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_CONNLESS 0x04 135 #define L2CAP_FC_A2MP 0x08 136 137 /* L2CAP Control Field bit masks */ 138 #define L2CAP_CTRL_SAR 0xC000 139 #define L2CAP_CTRL_REQSEQ 0x3F00 140 #define L2CAP_CTRL_TXSEQ 0x007E 141 #define L2CAP_CTRL_SUPERVISE 0x000C 142 143 #define L2CAP_CTRL_RETRANS 0x0080 144 #define L2CAP_CTRL_FINAL 0x0080 145 #define L2CAP_CTRL_POLL 0x0010 146 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 147 148 #define L2CAP_CTRL_TXSEQ_SHIFT 1 149 #define L2CAP_CTRL_SUPER_SHIFT 2 150 #define L2CAP_CTRL_POLL_SHIFT 4 151 #define L2CAP_CTRL_FINAL_SHIFT 7 152 #define L2CAP_CTRL_REQSEQ_SHIFT 8 153 #define L2CAP_CTRL_SAR_SHIFT 14 154 155 /* L2CAP Extended Control Field bit mask */ 156 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 157 #define L2CAP_EXT_CTRL_SAR 0x00030000 158 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 159 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 160 161 #define L2CAP_EXT_CTRL_POLL 0x00040000 162 #define L2CAP_EXT_CTRL_FINAL 0x00000002 163 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 164 165 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1 166 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 167 #define L2CAP_EXT_CTRL_SAR_SHIFT 16 168 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 169 #define L2CAP_EXT_CTRL_POLL_SHIFT 18 170 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 171 172 /* L2CAP Supervisory Function */ 173 #define L2CAP_SUPER_RR 0x00 174 #define L2CAP_SUPER_REJ 0x01 175 #define L2CAP_SUPER_RNR 0x02 176 #define L2CAP_SUPER_SREJ 0x03 177 178 /* L2CAP Segmentation and Reassembly */ 179 #define L2CAP_SAR_UNSEGMENTED 0x00 180 #define L2CAP_SAR_START 0x01 181 #define L2CAP_SAR_END 0x02 182 #define L2CAP_SAR_CONTINUE 0x03 183 184 /* L2CAP Command rej. reasons */ 185 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 186 #define L2CAP_REJ_MTU_EXCEEDED 0x0001 187 #define L2CAP_REJ_INVALID_CID 0x0002 188 189 /* L2CAP structures */ 190 struct l2cap_hdr { 191 __le16 len; 192 __le16 cid; 193 } __packed; 194 #define L2CAP_HDR_SIZE 4 195 #define L2CAP_ENH_HDR_SIZE 6 196 #define L2CAP_EXT_HDR_SIZE 8 197 198 #define L2CAP_FCS_SIZE 2 199 #define L2CAP_SDULEN_SIZE 2 200 #define L2CAP_PSMLEN_SIZE 2 201 #define L2CAP_ENH_CTRL_SIZE 2 202 #define L2CAP_EXT_CTRL_SIZE 4 203 204 struct l2cap_cmd_hdr { 205 __u8 code; 206 __u8 ident; 207 __le16 len; 208 } __packed; 209 #define L2CAP_CMD_HDR_SIZE 4 210 211 struct l2cap_cmd_rej_unk { 212 __le16 reason; 213 } __packed; 214 215 struct l2cap_cmd_rej_mtu { 216 __le16 reason; 217 __le16 max_mtu; 218 } __packed; 219 220 struct l2cap_cmd_rej_cid { 221 __le16 reason; 222 __le16 scid; 223 __le16 dcid; 224 } __packed; 225 226 struct l2cap_conn_req { 227 __le16 psm; 228 __le16 scid; 229 } __packed; 230 231 struct l2cap_conn_rsp { 232 __le16 dcid; 233 __le16 scid; 234 __le16 result; 235 __le16 status; 236 } __packed; 237 238 /* protocol/service multiplexer (PSM) */ 239 #define L2CAP_PSM_SDP 0x0001 240 #define L2CAP_PSM_RFCOMM 0x0003 241 #define L2CAP_PSM_3DSP 0x0021 242 243 /* channel identifier */ 244 #define L2CAP_CID_SIGNALING 0x0001 245 #define L2CAP_CID_CONN_LESS 0x0002 246 #define L2CAP_CID_A2MP 0x0003 247 #define L2CAP_CID_ATT 0x0004 248 #define L2CAP_CID_LE_SIGNALING 0x0005 249 #define L2CAP_CID_SMP 0x0006 250 #define L2CAP_CID_DYN_START 0x0040 251 #define L2CAP_CID_DYN_END 0xffff 252 253 /* connect/create channel results */ 254 #define L2CAP_CR_SUCCESS 0x0000 255 #define L2CAP_CR_PEND 0x0001 256 #define L2CAP_CR_BAD_PSM 0x0002 257 #define L2CAP_CR_SEC_BLOCK 0x0003 258 #define L2CAP_CR_NO_MEM 0x0004 259 #define L2CAP_CR_BAD_AMP 0x0005 260 261 /* connect/create channel status */ 262 #define L2CAP_CS_NO_INFO 0x0000 263 #define L2CAP_CS_AUTHEN_PEND 0x0001 264 #define L2CAP_CS_AUTHOR_PEND 0x0002 265 266 struct l2cap_conf_req { 267 __le16 dcid; 268 __le16 flags; 269 __u8 data[0]; 270 } __packed; 271 272 struct l2cap_conf_rsp { 273 __le16 scid; 274 __le16 flags; 275 __le16 result; 276 __u8 data[0]; 277 } __packed; 278 279 #define L2CAP_CONF_SUCCESS 0x0000 280 #define L2CAP_CONF_UNACCEPT 0x0001 281 #define L2CAP_CONF_REJECT 0x0002 282 #define L2CAP_CONF_UNKNOWN 0x0003 283 #define L2CAP_CONF_PENDING 0x0004 284 #define L2CAP_CONF_EFS_REJECT 0x0005 285 286 /* configuration req/rsp continuation flag */ 287 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 288 289 struct l2cap_conf_opt { 290 __u8 type; 291 __u8 len; 292 __u8 val[0]; 293 } __packed; 294 #define L2CAP_CONF_OPT_SIZE 2 295 296 #define L2CAP_CONF_HINT 0x80 297 #define L2CAP_CONF_MASK 0x7f 298 299 #define L2CAP_CONF_MTU 0x01 300 #define L2CAP_CONF_FLUSH_TO 0x02 301 #define L2CAP_CONF_QOS 0x03 302 #define L2CAP_CONF_RFC 0x04 303 #define L2CAP_CONF_FCS 0x05 304 #define L2CAP_CONF_EFS 0x06 305 #define L2CAP_CONF_EWS 0x07 306 307 #define L2CAP_CONF_MAX_SIZE 22 308 309 struct l2cap_conf_rfc { 310 __u8 mode; 311 __u8 txwin_size; 312 __u8 max_transmit; 313 __le16 retrans_timeout; 314 __le16 monitor_timeout; 315 __le16 max_pdu_size; 316 } __packed; 317 318 #define L2CAP_MODE_BASIC 0x00 319 #define L2CAP_MODE_RETRANS 0x01 320 #define L2CAP_MODE_FLOWCTL 0x02 321 #define L2CAP_MODE_ERTM 0x03 322 #define L2CAP_MODE_STREAMING 0x04 323 324 struct l2cap_conf_efs { 325 __u8 id; 326 __u8 stype; 327 __le16 msdu; 328 __le32 sdu_itime; 329 __le32 acc_lat; 330 __le32 flush_to; 331 } __packed; 332 333 #define L2CAP_SERV_NOTRAFIC 0x00 334 #define L2CAP_SERV_BESTEFFORT 0x01 335 #define L2CAP_SERV_GUARANTEED 0x02 336 337 #define L2CAP_BESTEFFORT_ID 0x01 338 339 struct l2cap_disconn_req { 340 __le16 dcid; 341 __le16 scid; 342 } __packed; 343 344 struct l2cap_disconn_rsp { 345 __le16 dcid; 346 __le16 scid; 347 } __packed; 348 349 struct l2cap_info_req { 350 __le16 type; 351 } __packed; 352 353 struct l2cap_info_rsp { 354 __le16 type; 355 __le16 result; 356 __u8 data[0]; 357 } __packed; 358 359 struct l2cap_create_chan_req { 360 __le16 psm; 361 __le16 scid; 362 __u8 amp_id; 363 } __packed; 364 365 struct l2cap_create_chan_rsp { 366 __le16 dcid; 367 __le16 scid; 368 __le16 result; 369 __le16 status; 370 } __packed; 371 372 struct l2cap_move_chan_req { 373 __le16 icid; 374 __u8 dest_amp_id; 375 } __packed; 376 377 struct l2cap_move_chan_rsp { 378 __le16 icid; 379 __le16 result; 380 } __packed; 381 382 #define L2CAP_MR_SUCCESS 0x0000 383 #define L2CAP_MR_PEND 0x0001 384 #define L2CAP_MR_BAD_ID 0x0002 385 #define L2CAP_MR_SAME_ID 0x0003 386 #define L2CAP_MR_NOT_SUPP 0x0004 387 #define L2CAP_MR_COLLISION 0x0005 388 #define L2CAP_MR_NOT_ALLOWED 0x0006 389 390 struct l2cap_move_chan_cfm { 391 __le16 icid; 392 __le16 result; 393 } __packed; 394 395 #define L2CAP_MC_CONFIRMED 0x0000 396 #define L2CAP_MC_UNCONFIRMED 0x0001 397 398 struct l2cap_move_chan_cfm_rsp { 399 __le16 icid; 400 } __packed; 401 402 /* info type */ 403 #define L2CAP_IT_CL_MTU 0x0001 404 #define L2CAP_IT_FEAT_MASK 0x0002 405 #define L2CAP_IT_FIXED_CHAN 0x0003 406 407 /* info result */ 408 #define L2CAP_IR_SUCCESS 0x0000 409 #define L2CAP_IR_NOTSUPP 0x0001 410 411 struct l2cap_conn_param_update_req { 412 __le16 min; 413 __le16 max; 414 __le16 latency; 415 __le16 to_multiplier; 416 } __packed; 417 418 struct l2cap_conn_param_update_rsp { 419 __le16 result; 420 } __packed; 421 422 /* Connection Parameters result */ 423 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 424 #define L2CAP_CONN_PARAM_REJECTED 0x0001 425 426 /* ----- L2CAP channels and connections ----- */ 427 struct l2cap_seq_list { 428 __u16 head; 429 __u16 tail; 430 __u16 mask; 431 __u16 *list; 432 }; 433 434 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF 435 #define L2CAP_SEQ_LIST_TAIL 0x8000 436 437 struct l2cap_chan { 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 bdaddr_t dst; 446 __u8 dst_type; 447 bdaddr_t src; 448 __u8 src_type; 449 __le16 psm; 450 __le16 sport; 451 __u16 dcid; 452 __u16 scid; 453 454 __u16 imtu; 455 __u16 omtu; 456 __u16 flush_to; 457 __u8 mode; 458 __u8 chan_type; 459 __u8 chan_policy; 460 461 __u8 sec_level; 462 463 __u8 ident; 464 465 __u8 conf_req[64]; 466 __u8 conf_len; 467 __u8 num_conf_req; 468 __u8 num_conf_rsp; 469 470 __u8 fcs; 471 472 __u16 tx_win; 473 __u16 tx_win_max; 474 __u16 ack_win; 475 __u8 max_tx; 476 __u16 retrans_timeout; 477 __u16 monitor_timeout; 478 __u16 mps; 479 480 __u8 tx_state; 481 __u8 rx_state; 482 483 unsigned long conf_state; 484 unsigned long conn_state; 485 unsigned long flags; 486 487 __u8 remote_amp_id; 488 __u8 local_amp_id; 489 __u8 move_id; 490 __u8 move_state; 491 __u8 move_role; 492 493 __u16 next_tx_seq; 494 __u16 expected_ack_seq; 495 __u16 expected_tx_seq; 496 __u16 buffer_seq; 497 __u16 srej_save_reqseq; 498 __u16 last_acked_seq; 499 __u16 frames_sent; 500 __u16 unacked_frames; 501 __u8 retry_count; 502 __u16 sdu_len; 503 struct sk_buff *sdu; 504 struct sk_buff *sdu_last_frag; 505 506 __u16 remote_tx_win; 507 __u8 remote_max_tx; 508 __u16 remote_mps; 509 510 __u8 local_id; 511 __u8 local_stype; 512 __u16 local_msdu; 513 __u32 local_sdu_itime; 514 __u32 local_acc_lat; 515 __u32 local_flush_to; 516 517 __u8 remote_id; 518 __u8 remote_stype; 519 __u16 remote_msdu; 520 __u32 remote_sdu_itime; 521 __u32 remote_acc_lat; 522 __u32 remote_flush_to; 523 524 struct delayed_work chan_timer; 525 struct delayed_work retrans_timer; 526 struct delayed_work monitor_timer; 527 struct delayed_work ack_timer; 528 529 struct sk_buff *tx_send_head; 530 struct sk_buff_head tx_q; 531 struct sk_buff_head srej_q; 532 struct l2cap_seq_list srej_list; 533 struct l2cap_seq_list retrans_list; 534 535 struct list_head list; 536 struct list_head global_l; 537 538 void *data; 539 struct l2cap_ops *ops; 540 struct mutex lock; 541 }; 542 543 struct l2cap_ops { 544 char *name; 545 546 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 547 int (*recv) (struct l2cap_chan * chan, 548 struct sk_buff *skb); 549 void (*teardown) (struct l2cap_chan *chan, int err); 550 void (*close) (struct l2cap_chan *chan); 551 void (*state_change) (struct l2cap_chan *chan, 552 int state, int err); 553 void (*ready) (struct l2cap_chan *chan); 554 void (*defer) (struct l2cap_chan *chan); 555 void (*resume) (struct l2cap_chan *chan); 556 void (*set_shutdown) (struct l2cap_chan *chan); 557 long (*get_sndtimeo) (struct l2cap_chan *chan); 558 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 559 unsigned long len, int nb); 560 }; 561 562 struct l2cap_conn { 563 struct hci_conn *hcon; 564 struct hci_chan *hchan; 565 566 unsigned int mtu; 567 568 __u32 feat_mask; 569 __u8 fixed_chan_mask; 570 bool hs_enabled; 571 572 __u8 info_state; 573 __u8 info_ident; 574 575 struct delayed_work info_timer; 576 577 spinlock_t lock; 578 579 struct sk_buff *rx_skb; 580 __u32 rx_len; 581 __u8 tx_ident; 582 583 __u8 disc_reason; 584 585 struct delayed_work security_timer; 586 struct smp_chan *smp_chan; 587 588 struct list_head chan_l; 589 struct mutex chan_lock; 590 struct kref ref; 591 struct list_head users; 592 }; 593 594 struct l2cap_user { 595 struct list_head list; 596 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); 597 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); 598 }; 599 600 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 601 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 602 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 603 604 #define L2CAP_CHAN_RAW 1 605 #define L2CAP_CHAN_CONN_LESS 2 606 #define L2CAP_CHAN_CONN_ORIENTED 3 607 #define L2CAP_CHAN_CONN_FIX_A2MP 4 608 609 /* ----- L2CAP socket info ----- */ 610 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 611 612 struct l2cap_pinfo { 613 struct bt_sock bt; 614 struct l2cap_chan *chan; 615 struct sk_buff *rx_busy_skb; 616 }; 617 618 enum { 619 CONF_REQ_SENT, 620 CONF_INPUT_DONE, 621 CONF_OUTPUT_DONE, 622 CONF_MTU_DONE, 623 CONF_MODE_DONE, 624 CONF_CONNECT_PEND, 625 CONF_RECV_NO_FCS, 626 CONF_STATE2_DEVICE, 627 CONF_EWS_RECV, 628 CONF_LOC_CONF_PEND, 629 CONF_REM_CONF_PEND, 630 CONF_NOT_COMPLETE, 631 }; 632 633 #define L2CAP_CONF_MAX_CONF_REQ 2 634 #define L2CAP_CONF_MAX_CONF_RSP 2 635 636 enum { 637 CONN_SREJ_SENT, 638 CONN_WAIT_F, 639 CONN_SREJ_ACT, 640 CONN_SEND_PBIT, 641 CONN_REMOTE_BUSY, 642 CONN_LOCAL_BUSY, 643 CONN_REJ_ACT, 644 CONN_SEND_FBIT, 645 CONN_RNR_SENT, 646 }; 647 648 /* Definitions for flags in l2cap_chan */ 649 enum { 650 FLAG_ROLE_SWITCH, 651 FLAG_FORCE_ACTIVE, 652 FLAG_FORCE_RELIABLE, 653 FLAG_FLUSHABLE, 654 FLAG_EXT_CTRL, 655 FLAG_EFS_ENABLE, 656 FLAG_DEFER_SETUP, 657 }; 658 659 enum { 660 L2CAP_TX_STATE_XMIT, 661 L2CAP_TX_STATE_WAIT_F, 662 }; 663 664 enum { 665 L2CAP_RX_STATE_RECV, 666 L2CAP_RX_STATE_SREJ_SENT, 667 L2CAP_RX_STATE_MOVE, 668 L2CAP_RX_STATE_WAIT_P, 669 L2CAP_RX_STATE_WAIT_F, 670 }; 671 672 enum { 673 L2CAP_TXSEQ_EXPECTED, 674 L2CAP_TXSEQ_EXPECTED_SREJ, 675 L2CAP_TXSEQ_UNEXPECTED, 676 L2CAP_TXSEQ_UNEXPECTED_SREJ, 677 L2CAP_TXSEQ_DUPLICATE, 678 L2CAP_TXSEQ_DUPLICATE_SREJ, 679 L2CAP_TXSEQ_INVALID, 680 L2CAP_TXSEQ_INVALID_IGNORE, 681 }; 682 683 enum { 684 L2CAP_EV_DATA_REQUEST, 685 L2CAP_EV_LOCAL_BUSY_DETECTED, 686 L2CAP_EV_LOCAL_BUSY_CLEAR, 687 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 688 L2CAP_EV_RECV_FBIT, 689 L2CAP_EV_RETRANS_TO, 690 L2CAP_EV_MONITOR_TO, 691 L2CAP_EV_EXPLICIT_POLL, 692 L2CAP_EV_RECV_IFRAME, 693 L2CAP_EV_RECV_RR, 694 L2CAP_EV_RECV_REJ, 695 L2CAP_EV_RECV_RNR, 696 L2CAP_EV_RECV_SREJ, 697 L2CAP_EV_RECV_FRAME, 698 }; 699 700 enum { 701 L2CAP_MOVE_ROLE_NONE, 702 L2CAP_MOVE_ROLE_INITIATOR, 703 L2CAP_MOVE_ROLE_RESPONDER, 704 }; 705 706 enum { 707 L2CAP_MOVE_STABLE, 708 L2CAP_MOVE_WAIT_REQ, 709 L2CAP_MOVE_WAIT_RSP, 710 L2CAP_MOVE_WAIT_RSP_SUCCESS, 711 L2CAP_MOVE_WAIT_CONFIRM, 712 L2CAP_MOVE_WAIT_CONFIRM_RSP, 713 L2CAP_MOVE_WAIT_LOGICAL_COMP, 714 L2CAP_MOVE_WAIT_LOGICAL_CFM, 715 L2CAP_MOVE_WAIT_LOCAL_BUSY, 716 L2CAP_MOVE_WAIT_PREPARE, 717 }; 718 719 void l2cap_chan_hold(struct l2cap_chan *c); 720 void l2cap_chan_put(struct l2cap_chan *c); 721 722 static inline void l2cap_chan_lock(struct l2cap_chan *chan) 723 { 724 mutex_lock(&chan->lock); 725 } 726 727 static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 728 { 729 mutex_unlock(&chan->lock); 730 } 731 732 static inline void l2cap_set_timer(struct l2cap_chan *chan, 733 struct delayed_work *work, long timeout) 734 { 735 BT_DBG("chan %p state %s timeout %ld", chan, 736 state_to_string(chan->state), timeout); 737 738 /* If delayed work cancelled do not hold(chan) 739 since it is already done with previous set_timer */ 740 if (!cancel_delayed_work(work)) 741 l2cap_chan_hold(chan); 742 743 schedule_delayed_work(work, timeout); 744 } 745 746 static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 747 struct delayed_work *work) 748 { 749 bool ret; 750 751 /* put(chan) if delayed work cancelled otherwise it 752 is done in delayed work function */ 753 ret = cancel_delayed_work(work); 754 if (ret) 755 l2cap_chan_put(chan); 756 757 return ret; 758 } 759 760 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 761 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 762 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 763 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 764 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 765 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 766 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 767 768 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 769 { 770 if (seq1 >= seq2) 771 return seq1 - seq2; 772 else 773 return chan->tx_win_max + 1 - seq2 + seq1; 774 } 775 776 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 777 { 778 return (seq + 1) % (chan->tx_win_max + 1); 779 } 780 781 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 782 { 783 return NULL; 784 } 785 786 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 787 { 788 } 789 790 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 791 { 792 } 793 794 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) 795 { 796 } 797 798 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) 799 { 800 } 801 802 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) 803 { 804 } 805 806 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) 807 { 808 return 0; 809 } 810 811 extern bool disable_ertm; 812 813 int l2cap_init_sockets(void); 814 void l2cap_cleanup_sockets(void); 815 bool l2cap_is_socket(struct socket *sock); 816 817 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 818 819 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 820 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 821 822 struct l2cap_chan *l2cap_chan_create(void); 823 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 824 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 825 bdaddr_t *dst, u8 dst_type); 826 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len, 827 u32 priority); 828 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 829 int l2cap_chan_check_security(struct l2cap_chan *chan); 830 void l2cap_chan_set_defaults(struct l2cap_chan *chan); 831 int l2cap_ertm_init(struct l2cap_chan *chan); 832 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 833 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 834 void l2cap_chan_del(struct l2cap_chan *chan, int err); 835 void l2cap_send_conn_req(struct l2cap_chan *chan); 836 void l2cap_move_start(struct l2cap_chan *chan); 837 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, 838 u8 status); 839 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result); 840 841 void l2cap_conn_get(struct l2cap_conn *conn); 842 void l2cap_conn_put(struct l2cap_conn *conn); 843 844 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); 845 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); 846 847 #endif /* __L2CAP_H */ 848