1 /* 2 BlueZ - Bluetooth protocol stack for Linux 3 Copyright (C) 2000-2001 Qualcomm Incorporated 4 Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> 5 Copyright (C) 2010 Google Inc. 6 7 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License version 2 as 11 published by the Free Software Foundation; 12 13 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 14 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 16 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY 17 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 18 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 19 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 20 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 21 22 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 23 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 24 SOFTWARE IS DISCLAIMED. 25 */ 26 27 #ifndef __L2CAP_H 28 #define __L2CAP_H 29 30 #include <asm/unaligned.h> 31 32 /* L2CAP defaults */ 33 #define L2CAP_DEFAULT_MTU 672 34 #define L2CAP_DEFAULT_MIN_MTU 48 35 #define L2CAP_DEFAULT_FLUSH_TO 0xFFFF 36 #define L2CAP_EFS_DEFAULT_FLUSH_TO 0xFFFFFFFF 37 #define L2CAP_DEFAULT_TX_WINDOW 63 38 #define L2CAP_DEFAULT_EXT_WINDOW 0x3FFF 39 #define L2CAP_DEFAULT_MAX_TX 3 40 #define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */ 41 #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */ 42 #define L2CAP_DEFAULT_MAX_PDU_SIZE 1492 /* Sized for AMP packet */ 43 #define L2CAP_DEFAULT_ACK_TO 200 44 #define L2CAP_DEFAULT_MAX_SDU_SIZE 0xFFFF 45 #define L2CAP_DEFAULT_SDU_ITIME 0xFFFFFFFF 46 #define L2CAP_DEFAULT_ACC_LAT 0xFFFFFFFF 47 #define L2CAP_BREDR_MAX_PAYLOAD 1019 /* 3-DH5 packet */ 48 #define L2CAP_LE_MIN_MTU 23 49 50 #define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100) 51 #define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000) 52 #define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000) 53 #define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000) 54 #define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000) 55 56 #define L2CAP_A2MP_DEFAULT_MTU 670 57 58 /* L2CAP socket address */ 59 struct sockaddr_l2 { 60 sa_family_t l2_family; 61 __le16 l2_psm; 62 bdaddr_t l2_bdaddr; 63 __le16 l2_cid; 64 __u8 l2_bdaddr_type; 65 }; 66 67 /* L2CAP socket options */ 68 #define L2CAP_OPTIONS 0x01 69 struct l2cap_options { 70 __u16 omtu; 71 __u16 imtu; 72 __u16 flush_to; 73 __u8 mode; 74 __u8 fcs; 75 __u8 max_tx; 76 __u16 txwin_size; 77 }; 78 79 #define L2CAP_CONNINFO 0x02 80 struct l2cap_conninfo { 81 __u16 hci_handle; 82 __u8 dev_class[3]; 83 }; 84 85 #define L2CAP_LM 0x03 86 #define L2CAP_LM_MASTER 0x0001 87 #define L2CAP_LM_AUTH 0x0002 88 #define L2CAP_LM_ENCRYPT 0x0004 89 #define L2CAP_LM_TRUSTED 0x0008 90 #define L2CAP_LM_RELIABLE 0x0010 91 #define L2CAP_LM_SECURE 0x0020 92 93 /* L2CAP command codes */ 94 #define L2CAP_COMMAND_REJ 0x01 95 #define L2CAP_CONN_REQ 0x02 96 #define L2CAP_CONN_RSP 0x03 97 #define L2CAP_CONF_REQ 0x04 98 #define L2CAP_CONF_RSP 0x05 99 #define L2CAP_DISCONN_REQ 0x06 100 #define L2CAP_DISCONN_RSP 0x07 101 #define L2CAP_ECHO_REQ 0x08 102 #define L2CAP_ECHO_RSP 0x09 103 #define L2CAP_INFO_REQ 0x0a 104 #define L2CAP_INFO_RSP 0x0b 105 #define L2CAP_CREATE_CHAN_REQ 0x0c 106 #define L2CAP_CREATE_CHAN_RSP 0x0d 107 #define L2CAP_MOVE_CHAN_REQ 0x0e 108 #define L2CAP_MOVE_CHAN_RSP 0x0f 109 #define L2CAP_MOVE_CHAN_CFM 0x10 110 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11 111 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12 112 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13 113 114 /* L2CAP extended feature mask */ 115 #define L2CAP_FEAT_FLOWCTL 0x00000001 116 #define L2CAP_FEAT_RETRANS 0x00000002 117 #define L2CAP_FEAT_BIDIR_QOS 0x00000004 118 #define L2CAP_FEAT_ERTM 0x00000008 119 #define L2CAP_FEAT_STREAMING 0x00000010 120 #define L2CAP_FEAT_FCS 0x00000020 121 #define L2CAP_FEAT_EXT_FLOW 0x00000040 122 #define L2CAP_FEAT_FIXED_CHAN 0x00000080 123 #define L2CAP_FEAT_EXT_WINDOW 0x00000100 124 #define L2CAP_FEAT_UCD 0x00000200 125 126 /* L2CAP checksum option */ 127 #define L2CAP_FCS_NONE 0x00 128 #define L2CAP_FCS_CRC16 0x01 129 130 /* L2CAP fixed channels */ 131 #define L2CAP_FC_L2CAP 0x02 132 #define L2CAP_FC_A2MP 0x08 133 134 /* L2CAP Control Field bit masks */ 135 #define L2CAP_CTRL_SAR 0xC000 136 #define L2CAP_CTRL_REQSEQ 0x3F00 137 #define L2CAP_CTRL_TXSEQ 0x007E 138 #define L2CAP_CTRL_SUPERVISE 0x000C 139 140 #define L2CAP_CTRL_RETRANS 0x0080 141 #define L2CAP_CTRL_FINAL 0x0080 142 #define L2CAP_CTRL_POLL 0x0010 143 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 144 145 #define L2CAP_CTRL_TXSEQ_SHIFT 1 146 #define L2CAP_CTRL_SUPER_SHIFT 2 147 #define L2CAP_CTRL_POLL_SHIFT 4 148 #define L2CAP_CTRL_FINAL_SHIFT 7 149 #define L2CAP_CTRL_REQSEQ_SHIFT 8 150 #define L2CAP_CTRL_SAR_SHIFT 14 151 152 /* L2CAP Extended Control Field bit mask */ 153 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 154 #define L2CAP_EXT_CTRL_SAR 0x00030000 155 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 156 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 157 158 #define L2CAP_EXT_CTRL_POLL 0x00040000 159 #define L2CAP_EXT_CTRL_FINAL 0x00000002 160 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 161 162 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1 163 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 164 #define L2CAP_EXT_CTRL_SAR_SHIFT 16 165 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 166 #define L2CAP_EXT_CTRL_POLL_SHIFT 18 167 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 168 169 /* L2CAP Supervisory Function */ 170 #define L2CAP_SUPER_RR 0x00 171 #define L2CAP_SUPER_REJ 0x01 172 #define L2CAP_SUPER_RNR 0x02 173 #define L2CAP_SUPER_SREJ 0x03 174 175 /* L2CAP Segmentation and Reassembly */ 176 #define L2CAP_SAR_UNSEGMENTED 0x00 177 #define L2CAP_SAR_START 0x01 178 #define L2CAP_SAR_END 0x02 179 #define L2CAP_SAR_CONTINUE 0x03 180 181 /* L2CAP Command rej. reasons */ 182 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 183 #define L2CAP_REJ_MTU_EXCEEDED 0x0001 184 #define L2CAP_REJ_INVALID_CID 0x0002 185 186 /* L2CAP structures */ 187 struct l2cap_hdr { 188 __le16 len; 189 __le16 cid; 190 } __packed; 191 #define L2CAP_HDR_SIZE 4 192 #define L2CAP_ENH_HDR_SIZE 6 193 #define L2CAP_EXT_HDR_SIZE 8 194 195 #define L2CAP_FCS_SIZE 2 196 #define L2CAP_SDULEN_SIZE 2 197 #define L2CAP_PSMLEN_SIZE 2 198 #define L2CAP_ENH_CTRL_SIZE 2 199 #define L2CAP_EXT_CTRL_SIZE 4 200 201 struct l2cap_cmd_hdr { 202 __u8 code; 203 __u8 ident; 204 __le16 len; 205 } __packed; 206 #define L2CAP_CMD_HDR_SIZE 4 207 208 struct l2cap_cmd_rej_unk { 209 __le16 reason; 210 } __packed; 211 212 struct l2cap_cmd_rej_mtu { 213 __le16 reason; 214 __le16 max_mtu; 215 } __packed; 216 217 struct l2cap_cmd_rej_cid { 218 __le16 reason; 219 __le16 scid; 220 __le16 dcid; 221 } __packed; 222 223 struct l2cap_conn_req { 224 __le16 psm; 225 __le16 scid; 226 } __packed; 227 228 struct l2cap_conn_rsp { 229 __le16 dcid; 230 __le16 scid; 231 __le16 result; 232 __le16 status; 233 } __packed; 234 235 /* protocol/service multiplexer (PSM) */ 236 #define L2CAP_PSM_SDP 0x0001 237 #define L2CAP_PSM_RFCOMM 0x0003 238 239 /* channel indentifier */ 240 #define L2CAP_CID_SIGNALING 0x0001 241 #define L2CAP_CID_CONN_LESS 0x0002 242 #define L2CAP_CID_A2MP 0x0003 243 #define L2CAP_CID_LE_DATA 0x0004 244 #define L2CAP_CID_LE_SIGNALING 0x0005 245 #define L2CAP_CID_SMP 0x0006 246 #define L2CAP_CID_DYN_START 0x0040 247 #define L2CAP_CID_DYN_END 0xffff 248 249 /* connect/create channel results */ 250 #define L2CAP_CR_SUCCESS 0x0000 251 #define L2CAP_CR_PEND 0x0001 252 #define L2CAP_CR_BAD_PSM 0x0002 253 #define L2CAP_CR_SEC_BLOCK 0x0003 254 #define L2CAP_CR_NO_MEM 0x0004 255 #define L2CAP_CR_BAD_AMP 0x0005 256 257 /* connect/create channel status */ 258 #define L2CAP_CS_NO_INFO 0x0000 259 #define L2CAP_CS_AUTHEN_PEND 0x0001 260 #define L2CAP_CS_AUTHOR_PEND 0x0002 261 262 struct l2cap_conf_req { 263 __le16 dcid; 264 __le16 flags; 265 __u8 data[0]; 266 } __packed; 267 268 struct l2cap_conf_rsp { 269 __le16 scid; 270 __le16 flags; 271 __le16 result; 272 __u8 data[0]; 273 } __packed; 274 275 #define L2CAP_CONF_SUCCESS 0x0000 276 #define L2CAP_CONF_UNACCEPT 0x0001 277 #define L2CAP_CONF_REJECT 0x0002 278 #define L2CAP_CONF_UNKNOWN 0x0003 279 #define L2CAP_CONF_PENDING 0x0004 280 #define L2CAP_CONF_EFS_REJECT 0x0005 281 282 /* configuration req/rsp continuation flag */ 283 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 284 285 struct l2cap_conf_opt { 286 __u8 type; 287 __u8 len; 288 __u8 val[0]; 289 } __packed; 290 #define L2CAP_CONF_OPT_SIZE 2 291 292 #define L2CAP_CONF_HINT 0x80 293 #define L2CAP_CONF_MASK 0x7f 294 295 #define L2CAP_CONF_MTU 0x01 296 #define L2CAP_CONF_FLUSH_TO 0x02 297 #define L2CAP_CONF_QOS 0x03 298 #define L2CAP_CONF_RFC 0x04 299 #define L2CAP_CONF_FCS 0x05 300 #define L2CAP_CONF_EFS 0x06 301 #define L2CAP_CONF_EWS 0x07 302 303 #define L2CAP_CONF_MAX_SIZE 22 304 305 struct l2cap_conf_rfc { 306 __u8 mode; 307 __u8 txwin_size; 308 __u8 max_transmit; 309 __le16 retrans_timeout; 310 __le16 monitor_timeout; 311 __le16 max_pdu_size; 312 } __packed; 313 314 #define L2CAP_MODE_BASIC 0x00 315 #define L2CAP_MODE_RETRANS 0x01 316 #define L2CAP_MODE_FLOWCTL 0x02 317 #define L2CAP_MODE_ERTM 0x03 318 #define L2CAP_MODE_STREAMING 0x04 319 320 struct l2cap_conf_efs { 321 __u8 id; 322 __u8 stype; 323 __le16 msdu; 324 __le32 sdu_itime; 325 __le32 acc_lat; 326 __le32 flush_to; 327 } __packed; 328 329 #define L2CAP_SERV_NOTRAFIC 0x00 330 #define L2CAP_SERV_BESTEFFORT 0x01 331 #define L2CAP_SERV_GUARANTEED 0x02 332 333 #define L2CAP_BESTEFFORT_ID 0x01 334 335 struct l2cap_disconn_req { 336 __le16 dcid; 337 __le16 scid; 338 } __packed; 339 340 struct l2cap_disconn_rsp { 341 __le16 dcid; 342 __le16 scid; 343 } __packed; 344 345 struct l2cap_info_req { 346 __le16 type; 347 } __packed; 348 349 struct l2cap_info_rsp { 350 __le16 type; 351 __le16 result; 352 __u8 data[0]; 353 } __packed; 354 355 struct l2cap_create_chan_req { 356 __le16 psm; 357 __le16 scid; 358 __u8 amp_id; 359 } __packed; 360 361 struct l2cap_create_chan_rsp { 362 __le16 dcid; 363 __le16 scid; 364 __le16 result; 365 __le16 status; 366 } __packed; 367 368 struct l2cap_move_chan_req { 369 __le16 icid; 370 __u8 dest_amp_id; 371 } __packed; 372 373 struct l2cap_move_chan_rsp { 374 __le16 icid; 375 __le16 result; 376 } __packed; 377 378 #define L2CAP_MR_SUCCESS 0x0000 379 #define L2CAP_MR_PEND 0x0001 380 #define L2CAP_MR_BAD_ID 0x0002 381 #define L2CAP_MR_SAME_ID 0x0003 382 #define L2CAP_MR_NOT_SUPP 0x0004 383 #define L2CAP_MR_COLLISION 0x0005 384 #define L2CAP_MR_NOT_ALLOWED 0x0006 385 386 struct l2cap_move_chan_cfm { 387 __le16 icid; 388 __le16 result; 389 } __packed; 390 391 #define L2CAP_MC_CONFIRMED 0x0000 392 #define L2CAP_MC_UNCONFIRMED 0x0001 393 394 struct l2cap_move_chan_cfm_rsp { 395 __le16 icid; 396 } __packed; 397 398 /* info type */ 399 #define L2CAP_IT_CL_MTU 0x0001 400 #define L2CAP_IT_FEAT_MASK 0x0002 401 #define L2CAP_IT_FIXED_CHAN 0x0003 402 403 /* info result */ 404 #define L2CAP_IR_SUCCESS 0x0000 405 #define L2CAP_IR_NOTSUPP 0x0001 406 407 struct l2cap_conn_param_update_req { 408 __le16 min; 409 __le16 max; 410 __le16 latency; 411 __le16 to_multiplier; 412 } __packed; 413 414 struct l2cap_conn_param_update_rsp { 415 __le16 result; 416 } __packed; 417 418 /* Connection Parameters result */ 419 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 420 #define L2CAP_CONN_PARAM_REJECTED 0x0001 421 422 /* ----- L2CAP channels and connections ----- */ 423 struct l2cap_seq_list { 424 __u16 head; 425 __u16 tail; 426 __u16 mask; 427 __u16 *list; 428 }; 429 430 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF 431 #define L2CAP_SEQ_LIST_TAIL 0x8000 432 433 struct l2cap_chan { 434 struct sock *sk; 435 436 struct l2cap_conn *conn; 437 struct kref kref; 438 439 __u8 state; 440 441 __le16 psm; 442 __u16 dcid; 443 __u16 scid; 444 445 __u16 imtu; 446 __u16 omtu; 447 __u16 flush_to; 448 __u8 mode; 449 __u8 chan_type; 450 __u8 chan_policy; 451 452 __le16 sport; 453 454 __u8 sec_level; 455 456 __u8 ident; 457 458 __u8 conf_req[64]; 459 __u8 conf_len; 460 __u8 num_conf_req; 461 __u8 num_conf_rsp; 462 463 __u8 fcs; 464 465 __u16 tx_win; 466 __u16 tx_win_max; 467 __u16 ack_win; 468 __u8 max_tx; 469 __u16 retrans_timeout; 470 __u16 monitor_timeout; 471 __u16 mps; 472 473 __u8 tx_state; 474 __u8 rx_state; 475 476 unsigned long conf_state; 477 unsigned long conn_state; 478 unsigned long flags; 479 480 __u16 next_tx_seq; 481 __u16 expected_ack_seq; 482 __u16 expected_tx_seq; 483 __u16 buffer_seq; 484 __u16 srej_save_reqseq; 485 __u16 last_acked_seq; 486 __u16 frames_sent; 487 __u16 unacked_frames; 488 __u8 retry_count; 489 __u16 srej_queue_next; 490 __u16 sdu_len; 491 struct sk_buff *sdu; 492 struct sk_buff *sdu_last_frag; 493 494 __u16 remote_tx_win; 495 __u8 remote_max_tx; 496 __u16 remote_mps; 497 498 __u8 local_id; 499 __u8 local_stype; 500 __u16 local_msdu; 501 __u32 local_sdu_itime; 502 __u32 local_acc_lat; 503 __u32 local_flush_to; 504 505 __u8 remote_id; 506 __u8 remote_stype; 507 __u16 remote_msdu; 508 __u32 remote_sdu_itime; 509 __u32 remote_acc_lat; 510 __u32 remote_flush_to; 511 512 __u8 ctrl_id; 513 514 struct delayed_work chan_timer; 515 struct delayed_work retrans_timer; 516 struct delayed_work monitor_timer; 517 struct delayed_work ack_timer; 518 519 struct sk_buff *tx_send_head; 520 struct sk_buff_head tx_q; 521 struct sk_buff_head srej_q; 522 struct l2cap_seq_list srej_list; 523 struct l2cap_seq_list retrans_list; 524 525 struct list_head list; 526 struct list_head global_l; 527 528 void *data; 529 struct l2cap_ops *ops; 530 struct mutex lock; 531 }; 532 533 struct l2cap_ops { 534 char *name; 535 536 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 537 int (*recv) (struct l2cap_chan * chan, 538 struct sk_buff *skb); 539 void (*teardown) (struct l2cap_chan *chan, int err); 540 void (*close) (struct l2cap_chan *chan); 541 void (*state_change) (struct l2cap_chan *chan, 542 int state); 543 void (*ready) (struct l2cap_chan *chan); 544 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 545 unsigned long len, int nb); 546 }; 547 548 struct l2cap_conn { 549 struct hci_conn *hcon; 550 struct hci_chan *hchan; 551 552 bdaddr_t *dst; 553 bdaddr_t *src; 554 555 unsigned int mtu; 556 557 __u32 feat_mask; 558 __u8 fixed_chan_mask; 559 560 __u8 info_state; 561 __u8 info_ident; 562 563 struct delayed_work info_timer; 564 565 spinlock_t lock; 566 567 struct sk_buff *rx_skb; 568 __u32 rx_len; 569 __u8 tx_ident; 570 571 __u8 disc_reason; 572 573 struct delayed_work security_timer; 574 struct smp_chan *smp_chan; 575 576 struct list_head chan_l; 577 struct mutex chan_lock; 578 }; 579 580 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 581 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 582 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 583 584 #define L2CAP_CHAN_RAW 1 585 #define L2CAP_CHAN_CONN_LESS 2 586 #define L2CAP_CHAN_CONN_ORIENTED 3 587 #define L2CAP_CHAN_CONN_FIX_A2MP 4 588 589 /* ----- L2CAP socket info ----- */ 590 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 591 592 struct l2cap_pinfo { 593 struct bt_sock bt; 594 struct l2cap_chan *chan; 595 struct sk_buff *rx_busy_skb; 596 }; 597 598 enum { 599 CONF_REQ_SENT, 600 CONF_INPUT_DONE, 601 CONF_OUTPUT_DONE, 602 CONF_MTU_DONE, 603 CONF_MODE_DONE, 604 CONF_CONNECT_PEND, 605 CONF_NO_FCS_RECV, 606 CONF_STATE2_DEVICE, 607 CONF_EWS_RECV, 608 CONF_LOC_CONF_PEND, 609 CONF_REM_CONF_PEND, 610 CONF_NOT_COMPLETE, 611 }; 612 613 #define L2CAP_CONF_MAX_CONF_REQ 2 614 #define L2CAP_CONF_MAX_CONF_RSP 2 615 616 enum { 617 CONN_SREJ_SENT, 618 CONN_WAIT_F, 619 CONN_SREJ_ACT, 620 CONN_SEND_PBIT, 621 CONN_REMOTE_BUSY, 622 CONN_LOCAL_BUSY, 623 CONN_REJ_ACT, 624 CONN_SEND_FBIT, 625 CONN_RNR_SENT, 626 }; 627 628 /* Definitions for flags in l2cap_chan */ 629 enum { 630 FLAG_ROLE_SWITCH, 631 FLAG_FORCE_ACTIVE, 632 FLAG_FORCE_RELIABLE, 633 FLAG_FLUSHABLE, 634 FLAG_EXT_CTRL, 635 FLAG_EFS_ENABLE, 636 }; 637 638 enum { 639 L2CAP_TX_STATE_XMIT, 640 L2CAP_TX_STATE_WAIT_F, 641 }; 642 643 enum { 644 L2CAP_RX_STATE_RECV, 645 L2CAP_RX_STATE_SREJ_SENT, 646 }; 647 648 enum { 649 L2CAP_TXSEQ_EXPECTED, 650 L2CAP_TXSEQ_EXPECTED_SREJ, 651 L2CAP_TXSEQ_UNEXPECTED, 652 L2CAP_TXSEQ_UNEXPECTED_SREJ, 653 L2CAP_TXSEQ_DUPLICATE, 654 L2CAP_TXSEQ_DUPLICATE_SREJ, 655 L2CAP_TXSEQ_INVALID, 656 L2CAP_TXSEQ_INVALID_IGNORE, 657 }; 658 659 enum { 660 L2CAP_EV_DATA_REQUEST, 661 L2CAP_EV_LOCAL_BUSY_DETECTED, 662 L2CAP_EV_LOCAL_BUSY_CLEAR, 663 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 664 L2CAP_EV_RECV_FBIT, 665 L2CAP_EV_RETRANS_TO, 666 L2CAP_EV_MONITOR_TO, 667 L2CAP_EV_EXPLICIT_POLL, 668 L2CAP_EV_RECV_IFRAME, 669 L2CAP_EV_RECV_RR, 670 L2CAP_EV_RECV_REJ, 671 L2CAP_EV_RECV_RNR, 672 L2CAP_EV_RECV_SREJ, 673 L2CAP_EV_RECV_FRAME, 674 }; 675 676 void l2cap_chan_hold(struct l2cap_chan *c); 677 void l2cap_chan_put(struct l2cap_chan *c); 678 679 static inline void l2cap_chan_lock(struct l2cap_chan *chan) 680 { 681 mutex_lock(&chan->lock); 682 } 683 684 static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 685 { 686 mutex_unlock(&chan->lock); 687 } 688 689 static inline void l2cap_set_timer(struct l2cap_chan *chan, 690 struct delayed_work *work, long timeout) 691 { 692 BT_DBG("chan %p state %s timeout %ld", chan, 693 state_to_string(chan->state), timeout); 694 695 /* If delayed work cancelled do not hold(chan) 696 since it is already done with previous set_timer */ 697 if (!cancel_delayed_work(work)) 698 l2cap_chan_hold(chan); 699 700 schedule_delayed_work(work, timeout); 701 } 702 703 static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 704 struct delayed_work *work) 705 { 706 bool ret; 707 708 /* put(chan) if delayed work cancelled otherwise it 709 is done in delayed work function */ 710 ret = cancel_delayed_work(work); 711 if (ret) 712 l2cap_chan_put(chan); 713 714 return ret; 715 } 716 717 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 718 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 719 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 720 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 721 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 722 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 723 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 724 725 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 726 { 727 if (seq1 >= seq2) 728 return seq1 - seq2; 729 else 730 return chan->tx_win_max + 1 - seq2 + seq1; 731 } 732 733 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 734 { 735 return (seq + 1) % (chan->tx_win_max + 1); 736 } 737 738 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 739 { 740 return NULL; 741 } 742 743 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 744 { 745 } 746 747 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 748 { 749 } 750 751 extern bool disable_ertm; 752 753 int l2cap_init_sockets(void); 754 void l2cap_cleanup_sockets(void); 755 756 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 757 int __l2cap_wait_ack(struct sock *sk); 758 759 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 760 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 761 762 struct l2cap_chan *l2cap_chan_create(void); 763 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 764 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 765 bdaddr_t *dst, u8 dst_type); 766 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len, 767 u32 priority); 768 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 769 int l2cap_chan_check_security(struct l2cap_chan *chan); 770 void l2cap_chan_set_defaults(struct l2cap_chan *chan); 771 int l2cap_ertm_init(struct l2cap_chan *chan); 772 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 773 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 774 void l2cap_chan_del(struct l2cap_chan *chan, int err); 775 void l2cap_send_conn_req(struct l2cap_chan *chan); 776 777 #endif /* __L2CAP_H */ 778