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 #define L2CAP_LE_CONN_REQ 0x14 116 #define L2CAP_LE_CONN_RSP 0x15 117 #define L2CAP_LE_CREDITS 0x16 118 119 /* L2CAP extended feature mask */ 120 #define L2CAP_FEAT_FLOWCTL 0x00000001 121 #define L2CAP_FEAT_RETRANS 0x00000002 122 #define L2CAP_FEAT_BIDIR_QOS 0x00000004 123 #define L2CAP_FEAT_ERTM 0x00000008 124 #define L2CAP_FEAT_STREAMING 0x00000010 125 #define L2CAP_FEAT_FCS 0x00000020 126 #define L2CAP_FEAT_EXT_FLOW 0x00000040 127 #define L2CAP_FEAT_FIXED_CHAN 0x00000080 128 #define L2CAP_FEAT_EXT_WINDOW 0x00000100 129 #define L2CAP_FEAT_UCD 0x00000200 130 131 /* L2CAP checksum option */ 132 #define L2CAP_FCS_NONE 0x00 133 #define L2CAP_FCS_CRC16 0x01 134 135 /* L2CAP fixed channels */ 136 #define L2CAP_FC_L2CAP 0x02 137 #define L2CAP_FC_CONNLESS 0x04 138 #define L2CAP_FC_A2MP 0x08 139 140 /* L2CAP Control Field bit masks */ 141 #define L2CAP_CTRL_SAR 0xC000 142 #define L2CAP_CTRL_REQSEQ 0x3F00 143 #define L2CAP_CTRL_TXSEQ 0x007E 144 #define L2CAP_CTRL_SUPERVISE 0x000C 145 146 #define L2CAP_CTRL_RETRANS 0x0080 147 #define L2CAP_CTRL_FINAL 0x0080 148 #define L2CAP_CTRL_POLL 0x0010 149 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 150 151 #define L2CAP_CTRL_TXSEQ_SHIFT 1 152 #define L2CAP_CTRL_SUPER_SHIFT 2 153 #define L2CAP_CTRL_POLL_SHIFT 4 154 #define L2CAP_CTRL_FINAL_SHIFT 7 155 #define L2CAP_CTRL_REQSEQ_SHIFT 8 156 #define L2CAP_CTRL_SAR_SHIFT 14 157 158 /* L2CAP Extended Control Field bit mask */ 159 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 160 #define L2CAP_EXT_CTRL_SAR 0x00030000 161 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 162 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 163 164 #define L2CAP_EXT_CTRL_POLL 0x00040000 165 #define L2CAP_EXT_CTRL_FINAL 0x00000002 166 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 167 168 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1 169 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 170 #define L2CAP_EXT_CTRL_SAR_SHIFT 16 171 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 172 #define L2CAP_EXT_CTRL_POLL_SHIFT 18 173 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 174 175 /* L2CAP Supervisory Function */ 176 #define L2CAP_SUPER_RR 0x00 177 #define L2CAP_SUPER_REJ 0x01 178 #define L2CAP_SUPER_RNR 0x02 179 #define L2CAP_SUPER_SREJ 0x03 180 181 /* L2CAP Segmentation and Reassembly */ 182 #define L2CAP_SAR_UNSEGMENTED 0x00 183 #define L2CAP_SAR_START 0x01 184 #define L2CAP_SAR_END 0x02 185 #define L2CAP_SAR_CONTINUE 0x03 186 187 /* L2CAP Command rej. reasons */ 188 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 189 #define L2CAP_REJ_MTU_EXCEEDED 0x0001 190 #define L2CAP_REJ_INVALID_CID 0x0002 191 192 /* L2CAP structures */ 193 struct l2cap_hdr { 194 __le16 len; 195 __le16 cid; 196 } __packed; 197 #define L2CAP_HDR_SIZE 4 198 #define L2CAP_ENH_HDR_SIZE 6 199 #define L2CAP_EXT_HDR_SIZE 8 200 201 #define L2CAP_FCS_SIZE 2 202 #define L2CAP_SDULEN_SIZE 2 203 #define L2CAP_PSMLEN_SIZE 2 204 #define L2CAP_ENH_CTRL_SIZE 2 205 #define L2CAP_EXT_CTRL_SIZE 4 206 207 struct l2cap_cmd_hdr { 208 __u8 code; 209 __u8 ident; 210 __le16 len; 211 } __packed; 212 #define L2CAP_CMD_HDR_SIZE 4 213 214 struct l2cap_cmd_rej_unk { 215 __le16 reason; 216 } __packed; 217 218 struct l2cap_cmd_rej_mtu { 219 __le16 reason; 220 __le16 max_mtu; 221 } __packed; 222 223 struct l2cap_cmd_rej_cid { 224 __le16 reason; 225 __le16 scid; 226 __le16 dcid; 227 } __packed; 228 229 struct l2cap_conn_req { 230 __le16 psm; 231 __le16 scid; 232 } __packed; 233 234 struct l2cap_conn_rsp { 235 __le16 dcid; 236 __le16 scid; 237 __le16 result; 238 __le16 status; 239 } __packed; 240 241 /* protocol/service multiplexer (PSM) */ 242 #define L2CAP_PSM_SDP 0x0001 243 #define L2CAP_PSM_RFCOMM 0x0003 244 #define L2CAP_PSM_3DSP 0x0021 245 246 /* channel identifier */ 247 #define L2CAP_CID_SIGNALING 0x0001 248 #define L2CAP_CID_CONN_LESS 0x0002 249 #define L2CAP_CID_A2MP 0x0003 250 #define L2CAP_CID_ATT 0x0004 251 #define L2CAP_CID_LE_SIGNALING 0x0005 252 #define L2CAP_CID_SMP 0x0006 253 #define L2CAP_CID_DYN_START 0x0040 254 #define L2CAP_CID_DYN_END 0xffff 255 256 /* connect/create channel results */ 257 #define L2CAP_CR_SUCCESS 0x0000 258 #define L2CAP_CR_PEND 0x0001 259 #define L2CAP_CR_BAD_PSM 0x0002 260 #define L2CAP_CR_SEC_BLOCK 0x0003 261 #define L2CAP_CR_NO_MEM 0x0004 262 #define L2CAP_CR_BAD_AMP 0x0005 263 #define L2CAP_CR_AUTHENTICATION 0x0005 264 #define L2CAP_CR_AUTHORIZATION 0x0006 265 #define L2CAP_CR_BAD_KEY_SIZE 0x0007 266 #define L2CAP_CR_ENCRYPTION 0x0008 267 268 /* connect/create channel status */ 269 #define L2CAP_CS_NO_INFO 0x0000 270 #define L2CAP_CS_AUTHEN_PEND 0x0001 271 #define L2CAP_CS_AUTHOR_PEND 0x0002 272 273 struct l2cap_conf_req { 274 __le16 dcid; 275 __le16 flags; 276 __u8 data[0]; 277 } __packed; 278 279 struct l2cap_conf_rsp { 280 __le16 scid; 281 __le16 flags; 282 __le16 result; 283 __u8 data[0]; 284 } __packed; 285 286 #define L2CAP_CONF_SUCCESS 0x0000 287 #define L2CAP_CONF_UNACCEPT 0x0001 288 #define L2CAP_CONF_REJECT 0x0002 289 #define L2CAP_CONF_UNKNOWN 0x0003 290 #define L2CAP_CONF_PENDING 0x0004 291 #define L2CAP_CONF_EFS_REJECT 0x0005 292 293 /* configuration req/rsp continuation flag */ 294 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 295 296 struct l2cap_conf_opt { 297 __u8 type; 298 __u8 len; 299 __u8 val[0]; 300 } __packed; 301 #define L2CAP_CONF_OPT_SIZE 2 302 303 #define L2CAP_CONF_HINT 0x80 304 #define L2CAP_CONF_MASK 0x7f 305 306 #define L2CAP_CONF_MTU 0x01 307 #define L2CAP_CONF_FLUSH_TO 0x02 308 #define L2CAP_CONF_QOS 0x03 309 #define L2CAP_CONF_RFC 0x04 310 #define L2CAP_CONF_FCS 0x05 311 #define L2CAP_CONF_EFS 0x06 312 #define L2CAP_CONF_EWS 0x07 313 314 #define L2CAP_CONF_MAX_SIZE 22 315 316 struct l2cap_conf_rfc { 317 __u8 mode; 318 __u8 txwin_size; 319 __u8 max_transmit; 320 __le16 retrans_timeout; 321 __le16 monitor_timeout; 322 __le16 max_pdu_size; 323 } __packed; 324 325 #define L2CAP_MODE_BASIC 0x00 326 #define L2CAP_MODE_RETRANS 0x01 327 #define L2CAP_MODE_FLOWCTL 0x02 328 #define L2CAP_MODE_ERTM 0x03 329 #define L2CAP_MODE_STREAMING 0x04 330 331 /* Unlike the above this one doesn't actually map to anything that would 332 * ever be sent over the air. Therefore, use a value that's unlikely to 333 * ever be used in the BR/EDR configuration phase. 334 */ 335 #define L2CAP_MODE_LE_FLOWCTL 0x80 336 337 struct l2cap_conf_efs { 338 __u8 id; 339 __u8 stype; 340 __le16 msdu; 341 __le32 sdu_itime; 342 __le32 acc_lat; 343 __le32 flush_to; 344 } __packed; 345 346 #define L2CAP_SERV_NOTRAFIC 0x00 347 #define L2CAP_SERV_BESTEFFORT 0x01 348 #define L2CAP_SERV_GUARANTEED 0x02 349 350 #define L2CAP_BESTEFFORT_ID 0x01 351 352 struct l2cap_disconn_req { 353 __le16 dcid; 354 __le16 scid; 355 } __packed; 356 357 struct l2cap_disconn_rsp { 358 __le16 dcid; 359 __le16 scid; 360 } __packed; 361 362 struct l2cap_info_req { 363 __le16 type; 364 } __packed; 365 366 struct l2cap_info_rsp { 367 __le16 type; 368 __le16 result; 369 __u8 data[0]; 370 } __packed; 371 372 struct l2cap_create_chan_req { 373 __le16 psm; 374 __le16 scid; 375 __u8 amp_id; 376 } __packed; 377 378 struct l2cap_create_chan_rsp { 379 __le16 dcid; 380 __le16 scid; 381 __le16 result; 382 __le16 status; 383 } __packed; 384 385 struct l2cap_move_chan_req { 386 __le16 icid; 387 __u8 dest_amp_id; 388 } __packed; 389 390 struct l2cap_move_chan_rsp { 391 __le16 icid; 392 __le16 result; 393 } __packed; 394 395 #define L2CAP_MR_SUCCESS 0x0000 396 #define L2CAP_MR_PEND 0x0001 397 #define L2CAP_MR_BAD_ID 0x0002 398 #define L2CAP_MR_SAME_ID 0x0003 399 #define L2CAP_MR_NOT_SUPP 0x0004 400 #define L2CAP_MR_COLLISION 0x0005 401 #define L2CAP_MR_NOT_ALLOWED 0x0006 402 403 struct l2cap_move_chan_cfm { 404 __le16 icid; 405 __le16 result; 406 } __packed; 407 408 #define L2CAP_MC_CONFIRMED 0x0000 409 #define L2CAP_MC_UNCONFIRMED 0x0001 410 411 struct l2cap_move_chan_cfm_rsp { 412 __le16 icid; 413 } __packed; 414 415 /* info type */ 416 #define L2CAP_IT_CL_MTU 0x0001 417 #define L2CAP_IT_FEAT_MASK 0x0002 418 #define L2CAP_IT_FIXED_CHAN 0x0003 419 420 /* info result */ 421 #define L2CAP_IR_SUCCESS 0x0000 422 #define L2CAP_IR_NOTSUPP 0x0001 423 424 struct l2cap_conn_param_update_req { 425 __le16 min; 426 __le16 max; 427 __le16 latency; 428 __le16 to_multiplier; 429 } __packed; 430 431 struct l2cap_conn_param_update_rsp { 432 __le16 result; 433 } __packed; 434 435 /* Connection Parameters result */ 436 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 437 #define L2CAP_CONN_PARAM_REJECTED 0x0001 438 439 #define L2CAP_LE_MAX_CREDITS 10 440 #define L2CAP_LE_DEFAULT_MPS 230 441 442 struct l2cap_le_conn_req { 443 __le16 psm; 444 __le16 scid; 445 __le16 mtu; 446 __le16 mps; 447 __le16 credits; 448 } __packed; 449 450 struct l2cap_le_conn_rsp { 451 __le16 dcid; 452 __le16 mtu; 453 __le16 mps; 454 __le16 credits; 455 __le16 result; 456 } __packed; 457 458 struct l2cap_le_credits { 459 __le16 cid; 460 __le16 credits; 461 } __packed; 462 463 /* ----- L2CAP channels and connections ----- */ 464 struct l2cap_seq_list { 465 __u16 head; 466 __u16 tail; 467 __u16 mask; 468 __u16 *list; 469 }; 470 471 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF 472 #define L2CAP_SEQ_LIST_TAIL 0x8000 473 474 struct l2cap_chan { 475 struct l2cap_conn *conn; 476 struct hci_conn *hs_hcon; 477 struct hci_chan *hs_hchan; 478 struct kref kref; 479 480 __u8 state; 481 482 bdaddr_t dst; 483 __u8 dst_type; 484 bdaddr_t src; 485 __u8 src_type; 486 __le16 psm; 487 __le16 sport; 488 __u16 dcid; 489 __u16 scid; 490 491 __u16 imtu; 492 __u16 omtu; 493 __u16 flush_to; 494 __u8 mode; 495 __u8 chan_type; 496 __u8 chan_policy; 497 498 __u8 sec_level; 499 500 __u8 ident; 501 502 __u8 conf_req[64]; 503 __u8 conf_len; 504 __u8 num_conf_req; 505 __u8 num_conf_rsp; 506 507 __u8 fcs; 508 509 __u16 tx_win; 510 __u16 tx_win_max; 511 __u16 ack_win; 512 __u8 max_tx; 513 __u16 retrans_timeout; 514 __u16 monitor_timeout; 515 __u16 mps; 516 517 __u16 tx_credits; 518 __u16 rx_credits; 519 520 __u8 tx_state; 521 __u8 rx_state; 522 523 unsigned long conf_state; 524 unsigned long conn_state; 525 unsigned long flags; 526 527 __u8 remote_amp_id; 528 __u8 local_amp_id; 529 __u8 move_id; 530 __u8 move_state; 531 __u8 move_role; 532 533 __u16 next_tx_seq; 534 __u16 expected_ack_seq; 535 __u16 expected_tx_seq; 536 __u16 buffer_seq; 537 __u16 srej_save_reqseq; 538 __u16 last_acked_seq; 539 __u16 frames_sent; 540 __u16 unacked_frames; 541 __u8 retry_count; 542 __u16 sdu_len; 543 struct sk_buff *sdu; 544 struct sk_buff *sdu_last_frag; 545 546 __u16 remote_tx_win; 547 __u8 remote_max_tx; 548 __u16 remote_mps; 549 550 __u8 local_id; 551 __u8 local_stype; 552 __u16 local_msdu; 553 __u32 local_sdu_itime; 554 __u32 local_acc_lat; 555 __u32 local_flush_to; 556 557 __u8 remote_id; 558 __u8 remote_stype; 559 __u16 remote_msdu; 560 __u32 remote_sdu_itime; 561 __u32 remote_acc_lat; 562 __u32 remote_flush_to; 563 564 struct delayed_work chan_timer; 565 struct delayed_work retrans_timer; 566 struct delayed_work monitor_timer; 567 struct delayed_work ack_timer; 568 569 struct sk_buff *tx_send_head; 570 struct sk_buff_head tx_q; 571 struct sk_buff_head srej_q; 572 struct l2cap_seq_list srej_list; 573 struct l2cap_seq_list retrans_list; 574 575 struct list_head list; 576 struct list_head global_l; 577 578 void *data; 579 struct l2cap_ops *ops; 580 struct mutex lock; 581 }; 582 583 struct l2cap_ops { 584 char *name; 585 586 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 587 int (*recv) (struct l2cap_chan * chan, 588 struct sk_buff *skb); 589 void (*teardown) (struct l2cap_chan *chan, int err); 590 void (*close) (struct l2cap_chan *chan); 591 void (*state_change) (struct l2cap_chan *chan, 592 int state, int err); 593 void (*ready) (struct l2cap_chan *chan); 594 void (*defer) (struct l2cap_chan *chan); 595 void (*resume) (struct l2cap_chan *chan); 596 void (*suspend) (struct l2cap_chan *chan); 597 void (*set_shutdown) (struct l2cap_chan *chan); 598 long (*get_sndtimeo) (struct l2cap_chan *chan); 599 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 600 unsigned long len, int nb); 601 }; 602 603 struct l2cap_conn { 604 struct hci_conn *hcon; 605 struct hci_chan *hchan; 606 607 unsigned int mtu; 608 609 __u32 feat_mask; 610 __u8 fixed_chan_mask; 611 bool hs_enabled; 612 613 __u8 info_state; 614 __u8 info_ident; 615 616 struct delayed_work info_timer; 617 618 spinlock_t lock; 619 620 struct sk_buff *rx_skb; 621 __u32 rx_len; 622 __u8 tx_ident; 623 624 __u8 disc_reason; 625 626 struct delayed_work security_timer; 627 struct smp_chan *smp_chan; 628 629 struct list_head chan_l; 630 struct mutex chan_lock; 631 struct kref ref; 632 struct list_head users; 633 }; 634 635 struct l2cap_user { 636 struct list_head list; 637 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); 638 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); 639 }; 640 641 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 642 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 643 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 644 645 #define L2CAP_CHAN_RAW 1 646 #define L2CAP_CHAN_CONN_LESS 2 647 #define L2CAP_CHAN_CONN_ORIENTED 3 648 #define L2CAP_CHAN_CONN_FIX_A2MP 4 649 650 /* ----- L2CAP socket info ----- */ 651 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 652 653 struct l2cap_pinfo { 654 struct bt_sock bt; 655 struct l2cap_chan *chan; 656 struct sk_buff *rx_busy_skb; 657 }; 658 659 enum { 660 CONF_REQ_SENT, 661 CONF_INPUT_DONE, 662 CONF_OUTPUT_DONE, 663 CONF_MTU_DONE, 664 CONF_MODE_DONE, 665 CONF_CONNECT_PEND, 666 CONF_RECV_NO_FCS, 667 CONF_STATE2_DEVICE, 668 CONF_EWS_RECV, 669 CONF_LOC_CONF_PEND, 670 CONF_REM_CONF_PEND, 671 CONF_NOT_COMPLETE, 672 }; 673 674 #define L2CAP_CONF_MAX_CONF_REQ 2 675 #define L2CAP_CONF_MAX_CONF_RSP 2 676 677 enum { 678 CONN_SREJ_SENT, 679 CONN_WAIT_F, 680 CONN_SREJ_ACT, 681 CONN_SEND_PBIT, 682 CONN_REMOTE_BUSY, 683 CONN_LOCAL_BUSY, 684 CONN_REJ_ACT, 685 CONN_SEND_FBIT, 686 CONN_RNR_SENT, 687 }; 688 689 /* Definitions for flags in l2cap_chan */ 690 enum { 691 FLAG_ROLE_SWITCH, 692 FLAG_FORCE_ACTIVE, 693 FLAG_FORCE_RELIABLE, 694 FLAG_FLUSHABLE, 695 FLAG_EXT_CTRL, 696 FLAG_EFS_ENABLE, 697 FLAG_DEFER_SETUP, 698 FLAG_LE_CONN_REQ_SENT, 699 }; 700 701 enum { 702 L2CAP_TX_STATE_XMIT, 703 L2CAP_TX_STATE_WAIT_F, 704 }; 705 706 enum { 707 L2CAP_RX_STATE_RECV, 708 L2CAP_RX_STATE_SREJ_SENT, 709 L2CAP_RX_STATE_MOVE, 710 L2CAP_RX_STATE_WAIT_P, 711 L2CAP_RX_STATE_WAIT_F, 712 }; 713 714 enum { 715 L2CAP_TXSEQ_EXPECTED, 716 L2CAP_TXSEQ_EXPECTED_SREJ, 717 L2CAP_TXSEQ_UNEXPECTED, 718 L2CAP_TXSEQ_UNEXPECTED_SREJ, 719 L2CAP_TXSEQ_DUPLICATE, 720 L2CAP_TXSEQ_DUPLICATE_SREJ, 721 L2CAP_TXSEQ_INVALID, 722 L2CAP_TXSEQ_INVALID_IGNORE, 723 }; 724 725 enum { 726 L2CAP_EV_DATA_REQUEST, 727 L2CAP_EV_LOCAL_BUSY_DETECTED, 728 L2CAP_EV_LOCAL_BUSY_CLEAR, 729 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 730 L2CAP_EV_RECV_FBIT, 731 L2CAP_EV_RETRANS_TO, 732 L2CAP_EV_MONITOR_TO, 733 L2CAP_EV_EXPLICIT_POLL, 734 L2CAP_EV_RECV_IFRAME, 735 L2CAP_EV_RECV_RR, 736 L2CAP_EV_RECV_REJ, 737 L2CAP_EV_RECV_RNR, 738 L2CAP_EV_RECV_SREJ, 739 L2CAP_EV_RECV_FRAME, 740 }; 741 742 enum { 743 L2CAP_MOVE_ROLE_NONE, 744 L2CAP_MOVE_ROLE_INITIATOR, 745 L2CAP_MOVE_ROLE_RESPONDER, 746 }; 747 748 enum { 749 L2CAP_MOVE_STABLE, 750 L2CAP_MOVE_WAIT_REQ, 751 L2CAP_MOVE_WAIT_RSP, 752 L2CAP_MOVE_WAIT_RSP_SUCCESS, 753 L2CAP_MOVE_WAIT_CONFIRM, 754 L2CAP_MOVE_WAIT_CONFIRM_RSP, 755 L2CAP_MOVE_WAIT_LOGICAL_COMP, 756 L2CAP_MOVE_WAIT_LOGICAL_CFM, 757 L2CAP_MOVE_WAIT_LOCAL_BUSY, 758 L2CAP_MOVE_WAIT_PREPARE, 759 }; 760 761 void l2cap_chan_hold(struct l2cap_chan *c); 762 void l2cap_chan_put(struct l2cap_chan *c); 763 764 static inline void l2cap_chan_lock(struct l2cap_chan *chan) 765 { 766 mutex_lock(&chan->lock); 767 } 768 769 static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 770 { 771 mutex_unlock(&chan->lock); 772 } 773 774 static inline void l2cap_set_timer(struct l2cap_chan *chan, 775 struct delayed_work *work, long timeout) 776 { 777 BT_DBG("chan %p state %s timeout %ld", chan, 778 state_to_string(chan->state), timeout); 779 780 /* If delayed work cancelled do not hold(chan) 781 since it is already done with previous set_timer */ 782 if (!cancel_delayed_work(work)) 783 l2cap_chan_hold(chan); 784 785 schedule_delayed_work(work, timeout); 786 } 787 788 static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 789 struct delayed_work *work) 790 { 791 bool ret; 792 793 /* put(chan) if delayed work cancelled otherwise it 794 is done in delayed work function */ 795 ret = cancel_delayed_work(work); 796 if (ret) 797 l2cap_chan_put(chan); 798 799 return ret; 800 } 801 802 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 803 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 804 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 805 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 806 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 807 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 808 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 809 810 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 811 { 812 if (seq1 >= seq2) 813 return seq1 - seq2; 814 else 815 return chan->tx_win_max + 1 - seq2 + seq1; 816 } 817 818 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 819 { 820 return (seq + 1) % (chan->tx_win_max + 1); 821 } 822 823 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 824 { 825 return NULL; 826 } 827 828 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 829 { 830 } 831 832 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 833 { 834 } 835 836 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) 837 { 838 } 839 840 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) 841 { 842 } 843 844 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) 845 { 846 } 847 848 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) 849 { 850 return 0; 851 } 852 853 extern bool disable_ertm; 854 extern bool enable_lecoc; 855 856 int l2cap_init_sockets(void); 857 void l2cap_cleanup_sockets(void); 858 bool l2cap_is_socket(struct socket *sock); 859 860 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan); 861 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 862 863 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 864 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 865 866 struct l2cap_chan *l2cap_chan_create(void); 867 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 868 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 869 bdaddr_t *dst, u8 dst_type); 870 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len, 871 u32 priority); 872 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 873 int l2cap_chan_check_security(struct l2cap_chan *chan); 874 void l2cap_chan_set_defaults(struct l2cap_chan *chan); 875 void l2cap_le_flowctl_init(struct l2cap_chan *chan); 876 int l2cap_ertm_init(struct l2cap_chan *chan); 877 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 878 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 879 void l2cap_chan_del(struct l2cap_chan *chan, int err); 880 void l2cap_send_conn_req(struct l2cap_chan *chan); 881 void l2cap_move_start(struct l2cap_chan *chan); 882 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, 883 u8 status); 884 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result); 885 886 void l2cap_conn_get(struct l2cap_conn *conn); 887 void l2cap_conn_put(struct l2cap_conn *conn); 888 889 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); 890 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); 891 892 #endif /* __L2CAP_H */ 893