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 #define L2CAP_MOVE_TIMEOUT msecs_to_jiffies(4000) 56 #define L2CAP_MOVE_ERTX_TIMEOUT msecs_to_jiffies(60000) 57 58 #define L2CAP_A2MP_DEFAULT_MTU 670 59 60 /* L2CAP socket address */ 61 struct sockaddr_l2 { 62 sa_family_t l2_family; 63 __le16 l2_psm; 64 bdaddr_t l2_bdaddr; 65 __le16 l2_cid; 66 __u8 l2_bdaddr_type; 67 }; 68 69 /* L2CAP socket options */ 70 #define L2CAP_OPTIONS 0x01 71 struct l2cap_options { 72 __u16 omtu; 73 __u16 imtu; 74 __u16 flush_to; 75 __u8 mode; 76 __u8 fcs; 77 __u8 max_tx; 78 __u16 txwin_size; 79 }; 80 81 #define L2CAP_CONNINFO 0x02 82 struct l2cap_conninfo { 83 __u16 hci_handle; 84 __u8 dev_class[3]; 85 }; 86 87 #define L2CAP_LM 0x03 88 #define L2CAP_LM_MASTER 0x0001 89 #define L2CAP_LM_AUTH 0x0002 90 #define L2CAP_LM_ENCRYPT 0x0004 91 #define L2CAP_LM_TRUSTED 0x0008 92 #define L2CAP_LM_RELIABLE 0x0010 93 #define L2CAP_LM_SECURE 0x0020 94 95 /* L2CAP command codes */ 96 #define L2CAP_COMMAND_REJ 0x01 97 #define L2CAP_CONN_REQ 0x02 98 #define L2CAP_CONN_RSP 0x03 99 #define L2CAP_CONF_REQ 0x04 100 #define L2CAP_CONF_RSP 0x05 101 #define L2CAP_DISCONN_REQ 0x06 102 #define L2CAP_DISCONN_RSP 0x07 103 #define L2CAP_ECHO_REQ 0x08 104 #define L2CAP_ECHO_RSP 0x09 105 #define L2CAP_INFO_REQ 0x0a 106 #define L2CAP_INFO_RSP 0x0b 107 #define L2CAP_CREATE_CHAN_REQ 0x0c 108 #define L2CAP_CREATE_CHAN_RSP 0x0d 109 #define L2CAP_MOVE_CHAN_REQ 0x0e 110 #define L2CAP_MOVE_CHAN_RSP 0x0f 111 #define L2CAP_MOVE_CHAN_CFM 0x10 112 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11 113 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12 114 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13 115 116 /* L2CAP extended feature mask */ 117 #define L2CAP_FEAT_FLOWCTL 0x00000001 118 #define L2CAP_FEAT_RETRANS 0x00000002 119 #define L2CAP_FEAT_BIDIR_QOS 0x00000004 120 #define L2CAP_FEAT_ERTM 0x00000008 121 #define L2CAP_FEAT_STREAMING 0x00000010 122 #define L2CAP_FEAT_FCS 0x00000020 123 #define L2CAP_FEAT_EXT_FLOW 0x00000040 124 #define L2CAP_FEAT_FIXED_CHAN 0x00000080 125 #define L2CAP_FEAT_EXT_WINDOW 0x00000100 126 #define L2CAP_FEAT_UCD 0x00000200 127 128 /* L2CAP checksum option */ 129 #define L2CAP_FCS_NONE 0x00 130 #define L2CAP_FCS_CRC16 0x01 131 132 /* L2CAP fixed channels */ 133 #define L2CAP_FC_L2CAP 0x02 134 #define L2CAP_FC_A2MP 0x08 135 136 /* L2CAP Control Field bit masks */ 137 #define L2CAP_CTRL_SAR 0xC000 138 #define L2CAP_CTRL_REQSEQ 0x3F00 139 #define L2CAP_CTRL_TXSEQ 0x007E 140 #define L2CAP_CTRL_SUPERVISE 0x000C 141 142 #define L2CAP_CTRL_RETRANS 0x0080 143 #define L2CAP_CTRL_FINAL 0x0080 144 #define L2CAP_CTRL_POLL 0x0010 145 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 146 147 #define L2CAP_CTRL_TXSEQ_SHIFT 1 148 #define L2CAP_CTRL_SUPER_SHIFT 2 149 #define L2CAP_CTRL_POLL_SHIFT 4 150 #define L2CAP_CTRL_FINAL_SHIFT 7 151 #define L2CAP_CTRL_REQSEQ_SHIFT 8 152 #define L2CAP_CTRL_SAR_SHIFT 14 153 154 /* L2CAP Extended Control Field bit mask */ 155 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 156 #define L2CAP_EXT_CTRL_SAR 0x00030000 157 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 158 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 159 160 #define L2CAP_EXT_CTRL_POLL 0x00040000 161 #define L2CAP_EXT_CTRL_FINAL 0x00000002 162 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 163 164 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1 165 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 166 #define L2CAP_EXT_CTRL_SAR_SHIFT 16 167 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 168 #define L2CAP_EXT_CTRL_POLL_SHIFT 18 169 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 170 171 /* L2CAP Supervisory Function */ 172 #define L2CAP_SUPER_RR 0x00 173 #define L2CAP_SUPER_REJ 0x01 174 #define L2CAP_SUPER_RNR 0x02 175 #define L2CAP_SUPER_SREJ 0x03 176 177 /* L2CAP Segmentation and Reassembly */ 178 #define L2CAP_SAR_UNSEGMENTED 0x00 179 #define L2CAP_SAR_START 0x01 180 #define L2CAP_SAR_END 0x02 181 #define L2CAP_SAR_CONTINUE 0x03 182 183 /* L2CAP Command rej. reasons */ 184 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 185 #define L2CAP_REJ_MTU_EXCEEDED 0x0001 186 #define L2CAP_REJ_INVALID_CID 0x0002 187 188 /* L2CAP structures */ 189 struct l2cap_hdr { 190 __le16 len; 191 __le16 cid; 192 } __packed; 193 #define L2CAP_HDR_SIZE 4 194 #define L2CAP_ENH_HDR_SIZE 6 195 #define L2CAP_EXT_HDR_SIZE 8 196 197 #define L2CAP_FCS_SIZE 2 198 #define L2CAP_SDULEN_SIZE 2 199 #define L2CAP_PSMLEN_SIZE 2 200 #define L2CAP_ENH_CTRL_SIZE 2 201 #define L2CAP_EXT_CTRL_SIZE 4 202 203 struct l2cap_cmd_hdr { 204 __u8 code; 205 __u8 ident; 206 __le16 len; 207 } __packed; 208 #define L2CAP_CMD_HDR_SIZE 4 209 210 struct l2cap_cmd_rej_unk { 211 __le16 reason; 212 } __packed; 213 214 struct l2cap_cmd_rej_mtu { 215 __le16 reason; 216 __le16 max_mtu; 217 } __packed; 218 219 struct l2cap_cmd_rej_cid { 220 __le16 reason; 221 __le16 scid; 222 __le16 dcid; 223 } __packed; 224 225 struct l2cap_conn_req { 226 __le16 psm; 227 __le16 scid; 228 } __packed; 229 230 struct l2cap_conn_rsp { 231 __le16 dcid; 232 __le16 scid; 233 __le16 result; 234 __le16 status; 235 } __packed; 236 237 /* protocol/service multiplexer (PSM) */ 238 #define L2CAP_PSM_SDP 0x0001 239 #define L2CAP_PSM_RFCOMM 0x0003 240 241 /* channel indentifier */ 242 #define L2CAP_CID_SIGNALING 0x0001 243 #define L2CAP_CID_CONN_LESS 0x0002 244 #define L2CAP_CID_A2MP 0x0003 245 #define L2CAP_CID_ATT 0x0004 246 #define L2CAP_CID_LE_SIGNALING 0x0005 247 #define L2CAP_CID_SMP 0x0006 248 #define L2CAP_CID_DYN_START 0x0040 249 #define L2CAP_CID_DYN_END 0xffff 250 251 /* connect/create channel results */ 252 #define L2CAP_CR_SUCCESS 0x0000 253 #define L2CAP_CR_PEND 0x0001 254 #define L2CAP_CR_BAD_PSM 0x0002 255 #define L2CAP_CR_SEC_BLOCK 0x0003 256 #define L2CAP_CR_NO_MEM 0x0004 257 #define L2CAP_CR_BAD_AMP 0x0005 258 259 /* connect/create channel status */ 260 #define L2CAP_CS_NO_INFO 0x0000 261 #define L2CAP_CS_AUTHEN_PEND 0x0001 262 #define L2CAP_CS_AUTHOR_PEND 0x0002 263 264 struct l2cap_conf_req { 265 __le16 dcid; 266 __le16 flags; 267 __u8 data[0]; 268 } __packed; 269 270 struct l2cap_conf_rsp { 271 __le16 scid; 272 __le16 flags; 273 __le16 result; 274 __u8 data[0]; 275 } __packed; 276 277 #define L2CAP_CONF_SUCCESS 0x0000 278 #define L2CAP_CONF_UNACCEPT 0x0001 279 #define L2CAP_CONF_REJECT 0x0002 280 #define L2CAP_CONF_UNKNOWN 0x0003 281 #define L2CAP_CONF_PENDING 0x0004 282 #define L2CAP_CONF_EFS_REJECT 0x0005 283 284 /* configuration req/rsp continuation flag */ 285 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 286 287 struct l2cap_conf_opt { 288 __u8 type; 289 __u8 len; 290 __u8 val[0]; 291 } __packed; 292 #define L2CAP_CONF_OPT_SIZE 2 293 294 #define L2CAP_CONF_HINT 0x80 295 #define L2CAP_CONF_MASK 0x7f 296 297 #define L2CAP_CONF_MTU 0x01 298 #define L2CAP_CONF_FLUSH_TO 0x02 299 #define L2CAP_CONF_QOS 0x03 300 #define L2CAP_CONF_RFC 0x04 301 #define L2CAP_CONF_FCS 0x05 302 #define L2CAP_CONF_EFS 0x06 303 #define L2CAP_CONF_EWS 0x07 304 305 #define L2CAP_CONF_MAX_SIZE 22 306 307 struct l2cap_conf_rfc { 308 __u8 mode; 309 __u8 txwin_size; 310 __u8 max_transmit; 311 __le16 retrans_timeout; 312 __le16 monitor_timeout; 313 __le16 max_pdu_size; 314 } __packed; 315 316 #define L2CAP_MODE_BASIC 0x00 317 #define L2CAP_MODE_RETRANS 0x01 318 #define L2CAP_MODE_FLOWCTL 0x02 319 #define L2CAP_MODE_ERTM 0x03 320 #define L2CAP_MODE_STREAMING 0x04 321 322 struct l2cap_conf_efs { 323 __u8 id; 324 __u8 stype; 325 __le16 msdu; 326 __le32 sdu_itime; 327 __le32 acc_lat; 328 __le32 flush_to; 329 } __packed; 330 331 #define L2CAP_SERV_NOTRAFIC 0x00 332 #define L2CAP_SERV_BESTEFFORT 0x01 333 #define L2CAP_SERV_GUARANTEED 0x02 334 335 #define L2CAP_BESTEFFORT_ID 0x01 336 337 struct l2cap_disconn_req { 338 __le16 dcid; 339 __le16 scid; 340 } __packed; 341 342 struct l2cap_disconn_rsp { 343 __le16 dcid; 344 __le16 scid; 345 } __packed; 346 347 struct l2cap_info_req { 348 __le16 type; 349 } __packed; 350 351 struct l2cap_info_rsp { 352 __le16 type; 353 __le16 result; 354 __u8 data[0]; 355 } __packed; 356 357 struct l2cap_create_chan_req { 358 __le16 psm; 359 __le16 scid; 360 __u8 amp_id; 361 } __packed; 362 363 struct l2cap_create_chan_rsp { 364 __le16 dcid; 365 __le16 scid; 366 __le16 result; 367 __le16 status; 368 } __packed; 369 370 struct l2cap_move_chan_req { 371 __le16 icid; 372 __u8 dest_amp_id; 373 } __packed; 374 375 struct l2cap_move_chan_rsp { 376 __le16 icid; 377 __le16 result; 378 } __packed; 379 380 #define L2CAP_MR_SUCCESS 0x0000 381 #define L2CAP_MR_PEND 0x0001 382 #define L2CAP_MR_BAD_ID 0x0002 383 #define L2CAP_MR_SAME_ID 0x0003 384 #define L2CAP_MR_NOT_SUPP 0x0004 385 #define L2CAP_MR_COLLISION 0x0005 386 #define L2CAP_MR_NOT_ALLOWED 0x0006 387 388 struct l2cap_move_chan_cfm { 389 __le16 icid; 390 __le16 result; 391 } __packed; 392 393 #define L2CAP_MC_CONFIRMED 0x0000 394 #define L2CAP_MC_UNCONFIRMED 0x0001 395 396 struct l2cap_move_chan_cfm_rsp { 397 __le16 icid; 398 } __packed; 399 400 /* info type */ 401 #define L2CAP_IT_CL_MTU 0x0001 402 #define L2CAP_IT_FEAT_MASK 0x0002 403 #define L2CAP_IT_FIXED_CHAN 0x0003 404 405 /* info result */ 406 #define L2CAP_IR_SUCCESS 0x0000 407 #define L2CAP_IR_NOTSUPP 0x0001 408 409 struct l2cap_conn_param_update_req { 410 __le16 min; 411 __le16 max; 412 __le16 latency; 413 __le16 to_multiplier; 414 } __packed; 415 416 struct l2cap_conn_param_update_rsp { 417 __le16 result; 418 } __packed; 419 420 /* Connection Parameters result */ 421 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 422 #define L2CAP_CONN_PARAM_REJECTED 0x0001 423 424 /* ----- L2CAP channels and connections ----- */ 425 struct l2cap_seq_list { 426 __u16 head; 427 __u16 tail; 428 __u16 mask; 429 __u16 *list; 430 }; 431 432 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF 433 #define L2CAP_SEQ_LIST_TAIL 0x8000 434 435 struct l2cap_chan { 436 struct sock *sk; 437 438 struct l2cap_conn *conn; 439 struct hci_conn *hs_hcon; 440 struct hci_chan *hs_hchan; 441 struct kref kref; 442 443 __u8 state; 444 445 __le16 psm; 446 __u16 dcid; 447 __u16 scid; 448 449 __u16 imtu; 450 __u16 omtu; 451 __u16 flush_to; 452 __u8 mode; 453 __u8 chan_type; 454 __u8 chan_policy; 455 456 __le16 sport; 457 458 __u8 sec_level; 459 460 __u8 ident; 461 462 __u8 conf_req[64]; 463 __u8 conf_len; 464 __u8 num_conf_req; 465 __u8 num_conf_rsp; 466 467 __u8 fcs; 468 469 __u16 tx_win; 470 __u16 tx_win_max; 471 __u16 ack_win; 472 __u8 max_tx; 473 __u16 retrans_timeout; 474 __u16 monitor_timeout; 475 __u16 mps; 476 477 __u8 tx_state; 478 __u8 rx_state; 479 480 unsigned long conf_state; 481 unsigned long conn_state; 482 unsigned long flags; 483 484 __u8 remote_amp_id; 485 __u8 local_amp_id; 486 __u8 move_id; 487 __u8 move_state; 488 __u8 move_role; 489 490 __u16 next_tx_seq; 491 __u16 expected_ack_seq; 492 __u16 expected_tx_seq; 493 __u16 buffer_seq; 494 __u16 srej_save_reqseq; 495 __u16 last_acked_seq; 496 __u16 frames_sent; 497 __u16 unacked_frames; 498 __u8 retry_count; 499 __u16 sdu_len; 500 struct sk_buff *sdu; 501 struct sk_buff *sdu_last_frag; 502 503 __u16 remote_tx_win; 504 __u8 remote_max_tx; 505 __u16 remote_mps; 506 507 __u8 local_id; 508 __u8 local_stype; 509 __u16 local_msdu; 510 __u32 local_sdu_itime; 511 __u32 local_acc_lat; 512 __u32 local_flush_to; 513 514 __u8 remote_id; 515 __u8 remote_stype; 516 __u16 remote_msdu; 517 __u32 remote_sdu_itime; 518 __u32 remote_acc_lat; 519 __u32 remote_flush_to; 520 521 struct delayed_work chan_timer; 522 struct delayed_work retrans_timer; 523 struct delayed_work monitor_timer; 524 struct delayed_work ack_timer; 525 526 struct sk_buff *tx_send_head; 527 struct sk_buff_head tx_q; 528 struct sk_buff_head srej_q; 529 struct l2cap_seq_list srej_list; 530 struct l2cap_seq_list retrans_list; 531 532 struct list_head list; 533 struct list_head global_l; 534 535 void *data; 536 struct l2cap_ops *ops; 537 struct mutex lock; 538 }; 539 540 struct l2cap_ops { 541 char *name; 542 543 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 544 int (*recv) (struct l2cap_chan * chan, 545 struct sk_buff *skb); 546 void (*teardown) (struct l2cap_chan *chan, int err); 547 void (*close) (struct l2cap_chan *chan); 548 void (*state_change) (struct l2cap_chan *chan, 549 int state); 550 void (*ready) (struct l2cap_chan *chan); 551 void (*defer) (struct l2cap_chan *chan); 552 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 553 unsigned long len, int nb); 554 }; 555 556 struct l2cap_conn { 557 struct hci_conn *hcon; 558 struct hci_chan *hchan; 559 560 bdaddr_t *dst; 561 bdaddr_t *src; 562 563 unsigned int mtu; 564 565 __u32 feat_mask; 566 __u8 fixed_chan_mask; 567 bool hs_enabled; 568 569 __u8 info_state; 570 __u8 info_ident; 571 572 struct delayed_work info_timer; 573 574 spinlock_t lock; 575 576 struct sk_buff *rx_skb; 577 __u32 rx_len; 578 __u8 tx_ident; 579 580 __u8 disc_reason; 581 582 struct delayed_work security_timer; 583 struct smp_chan *smp_chan; 584 585 struct list_head chan_l; 586 struct mutex chan_lock; 587 struct kref ref; 588 struct list_head users; 589 }; 590 591 struct l2cap_user { 592 struct list_head list; 593 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); 594 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); 595 }; 596 597 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 598 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 599 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 600 601 #define L2CAP_CHAN_RAW 1 602 #define L2CAP_CHAN_CONN_LESS 2 603 #define L2CAP_CHAN_CONN_ORIENTED 3 604 #define L2CAP_CHAN_CONN_FIX_A2MP 4 605 606 /* ----- L2CAP socket info ----- */ 607 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 608 609 struct l2cap_pinfo { 610 struct bt_sock bt; 611 struct l2cap_chan *chan; 612 struct sk_buff *rx_busy_skb; 613 }; 614 615 enum { 616 CONF_REQ_SENT, 617 CONF_INPUT_DONE, 618 CONF_OUTPUT_DONE, 619 CONF_MTU_DONE, 620 CONF_MODE_DONE, 621 CONF_CONNECT_PEND, 622 CONF_RECV_NO_FCS, 623 CONF_STATE2_DEVICE, 624 CONF_EWS_RECV, 625 CONF_LOC_CONF_PEND, 626 CONF_REM_CONF_PEND, 627 CONF_NOT_COMPLETE, 628 }; 629 630 #define L2CAP_CONF_MAX_CONF_REQ 2 631 #define L2CAP_CONF_MAX_CONF_RSP 2 632 633 enum { 634 CONN_SREJ_SENT, 635 CONN_WAIT_F, 636 CONN_SREJ_ACT, 637 CONN_SEND_PBIT, 638 CONN_REMOTE_BUSY, 639 CONN_LOCAL_BUSY, 640 CONN_REJ_ACT, 641 CONN_SEND_FBIT, 642 CONN_RNR_SENT, 643 }; 644 645 /* Definitions for flags in l2cap_chan */ 646 enum { 647 FLAG_ROLE_SWITCH, 648 FLAG_FORCE_ACTIVE, 649 FLAG_FORCE_RELIABLE, 650 FLAG_FLUSHABLE, 651 FLAG_EXT_CTRL, 652 FLAG_EFS_ENABLE, 653 }; 654 655 enum { 656 L2CAP_TX_STATE_XMIT, 657 L2CAP_TX_STATE_WAIT_F, 658 }; 659 660 enum { 661 L2CAP_RX_STATE_RECV, 662 L2CAP_RX_STATE_SREJ_SENT, 663 L2CAP_RX_STATE_MOVE, 664 L2CAP_RX_STATE_WAIT_P, 665 L2CAP_RX_STATE_WAIT_F, 666 }; 667 668 enum { 669 L2CAP_TXSEQ_EXPECTED, 670 L2CAP_TXSEQ_EXPECTED_SREJ, 671 L2CAP_TXSEQ_UNEXPECTED, 672 L2CAP_TXSEQ_UNEXPECTED_SREJ, 673 L2CAP_TXSEQ_DUPLICATE, 674 L2CAP_TXSEQ_DUPLICATE_SREJ, 675 L2CAP_TXSEQ_INVALID, 676 L2CAP_TXSEQ_INVALID_IGNORE, 677 }; 678 679 enum { 680 L2CAP_EV_DATA_REQUEST, 681 L2CAP_EV_LOCAL_BUSY_DETECTED, 682 L2CAP_EV_LOCAL_BUSY_CLEAR, 683 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 684 L2CAP_EV_RECV_FBIT, 685 L2CAP_EV_RETRANS_TO, 686 L2CAP_EV_MONITOR_TO, 687 L2CAP_EV_EXPLICIT_POLL, 688 L2CAP_EV_RECV_IFRAME, 689 L2CAP_EV_RECV_RR, 690 L2CAP_EV_RECV_REJ, 691 L2CAP_EV_RECV_RNR, 692 L2CAP_EV_RECV_SREJ, 693 L2CAP_EV_RECV_FRAME, 694 }; 695 696 enum { 697 L2CAP_MOVE_ROLE_NONE, 698 L2CAP_MOVE_ROLE_INITIATOR, 699 L2CAP_MOVE_ROLE_RESPONDER, 700 }; 701 702 enum { 703 L2CAP_MOVE_STABLE, 704 L2CAP_MOVE_WAIT_REQ, 705 L2CAP_MOVE_WAIT_RSP, 706 L2CAP_MOVE_WAIT_RSP_SUCCESS, 707 L2CAP_MOVE_WAIT_CONFIRM, 708 L2CAP_MOVE_WAIT_CONFIRM_RSP, 709 L2CAP_MOVE_WAIT_LOGICAL_COMP, 710 L2CAP_MOVE_WAIT_LOGICAL_CFM, 711 L2CAP_MOVE_WAIT_LOCAL_BUSY, 712 L2CAP_MOVE_WAIT_PREPARE, 713 }; 714 715 void l2cap_chan_hold(struct l2cap_chan *c); 716 void l2cap_chan_put(struct l2cap_chan *c); 717 718 static inline void l2cap_chan_lock(struct l2cap_chan *chan) 719 { 720 mutex_lock(&chan->lock); 721 } 722 723 static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 724 { 725 mutex_unlock(&chan->lock); 726 } 727 728 static inline void l2cap_set_timer(struct l2cap_chan *chan, 729 struct delayed_work *work, long timeout) 730 { 731 BT_DBG("chan %p state %s timeout %ld", chan, 732 state_to_string(chan->state), timeout); 733 734 /* If delayed work cancelled do not hold(chan) 735 since it is already done with previous set_timer */ 736 if (!cancel_delayed_work(work)) 737 l2cap_chan_hold(chan); 738 739 schedule_delayed_work(work, timeout); 740 } 741 742 static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 743 struct delayed_work *work) 744 { 745 bool ret; 746 747 /* put(chan) if delayed work cancelled otherwise it 748 is done in delayed work function */ 749 ret = cancel_delayed_work(work); 750 if (ret) 751 l2cap_chan_put(chan); 752 753 return ret; 754 } 755 756 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 757 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 758 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 759 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 760 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 761 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 762 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 763 764 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 765 { 766 if (seq1 >= seq2) 767 return seq1 - seq2; 768 else 769 return chan->tx_win_max + 1 - seq2 + seq1; 770 } 771 772 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 773 { 774 return (seq + 1) % (chan->tx_win_max + 1); 775 } 776 777 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 778 { 779 return NULL; 780 } 781 782 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 783 { 784 } 785 786 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 787 { 788 } 789 790 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) 791 { 792 } 793 794 extern bool disable_ertm; 795 796 int l2cap_init_sockets(void); 797 void l2cap_cleanup_sockets(void); 798 bool l2cap_is_socket(struct socket *sock); 799 800 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 801 int __l2cap_wait_ack(struct sock *sk); 802 803 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 804 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 805 806 struct l2cap_chan *l2cap_chan_create(void); 807 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 808 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 809 bdaddr_t *dst, u8 dst_type); 810 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len, 811 u32 priority); 812 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 813 int l2cap_chan_check_security(struct l2cap_chan *chan); 814 void l2cap_chan_set_defaults(struct l2cap_chan *chan); 815 int l2cap_ertm_init(struct l2cap_chan *chan); 816 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 817 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 818 void l2cap_chan_del(struct l2cap_chan *chan, int err); 819 void l2cap_send_conn_req(struct l2cap_chan *chan); 820 void l2cap_move_start(struct l2cap_chan *chan); 821 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, 822 u8 status); 823 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result); 824 825 void l2cap_conn_get(struct l2cap_conn *conn); 826 void l2cap_conn_put(struct l2cap_conn *conn); 827 828 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); 829 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); 830 831 #endif /* __L2CAP_H */ 832