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 #define L2CAP_CID_LE_DYN_END 0x007f 256 257 /* connect/create channel results */ 258 #define L2CAP_CR_SUCCESS 0x0000 259 #define L2CAP_CR_PEND 0x0001 260 #define L2CAP_CR_BAD_PSM 0x0002 261 #define L2CAP_CR_SEC_BLOCK 0x0003 262 #define L2CAP_CR_NO_MEM 0x0004 263 #define L2CAP_CR_BAD_AMP 0x0005 264 #define L2CAP_CR_AUTHENTICATION 0x0005 265 #define L2CAP_CR_AUTHORIZATION 0x0006 266 #define L2CAP_CR_BAD_KEY_SIZE 0x0007 267 #define L2CAP_CR_ENCRYPTION 0x0008 268 269 /* connect/create channel status */ 270 #define L2CAP_CS_NO_INFO 0x0000 271 #define L2CAP_CS_AUTHEN_PEND 0x0001 272 #define L2CAP_CS_AUTHOR_PEND 0x0002 273 274 struct l2cap_conf_req { 275 __le16 dcid; 276 __le16 flags; 277 __u8 data[0]; 278 } __packed; 279 280 struct l2cap_conf_rsp { 281 __le16 scid; 282 __le16 flags; 283 __le16 result; 284 __u8 data[0]; 285 } __packed; 286 287 #define L2CAP_CONF_SUCCESS 0x0000 288 #define L2CAP_CONF_UNACCEPT 0x0001 289 #define L2CAP_CONF_REJECT 0x0002 290 #define L2CAP_CONF_UNKNOWN 0x0003 291 #define L2CAP_CONF_PENDING 0x0004 292 #define L2CAP_CONF_EFS_REJECT 0x0005 293 294 /* configuration req/rsp continuation flag */ 295 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 296 297 struct l2cap_conf_opt { 298 __u8 type; 299 __u8 len; 300 __u8 val[0]; 301 } __packed; 302 #define L2CAP_CONF_OPT_SIZE 2 303 304 #define L2CAP_CONF_HINT 0x80 305 #define L2CAP_CONF_MASK 0x7f 306 307 #define L2CAP_CONF_MTU 0x01 308 #define L2CAP_CONF_FLUSH_TO 0x02 309 #define L2CAP_CONF_QOS 0x03 310 #define L2CAP_CONF_RFC 0x04 311 #define L2CAP_CONF_FCS 0x05 312 #define L2CAP_CONF_EFS 0x06 313 #define L2CAP_CONF_EWS 0x07 314 315 #define L2CAP_CONF_MAX_SIZE 22 316 317 struct l2cap_conf_rfc { 318 __u8 mode; 319 __u8 txwin_size; 320 __u8 max_transmit; 321 __le16 retrans_timeout; 322 __le16 monitor_timeout; 323 __le16 max_pdu_size; 324 } __packed; 325 326 #define L2CAP_MODE_BASIC 0x00 327 #define L2CAP_MODE_RETRANS 0x01 328 #define L2CAP_MODE_FLOWCTL 0x02 329 #define L2CAP_MODE_ERTM 0x03 330 #define L2CAP_MODE_STREAMING 0x04 331 332 /* Unlike the above this one doesn't actually map to anything that would 333 * ever be sent over the air. Therefore, use a value that's unlikely to 334 * ever be used in the BR/EDR configuration phase. 335 */ 336 #define L2CAP_MODE_LE_FLOWCTL 0x80 337 338 struct l2cap_conf_efs { 339 __u8 id; 340 __u8 stype; 341 __le16 msdu; 342 __le32 sdu_itime; 343 __le32 acc_lat; 344 __le32 flush_to; 345 } __packed; 346 347 #define L2CAP_SERV_NOTRAFIC 0x00 348 #define L2CAP_SERV_BESTEFFORT 0x01 349 #define L2CAP_SERV_GUARANTEED 0x02 350 351 #define L2CAP_BESTEFFORT_ID 0x01 352 353 struct l2cap_disconn_req { 354 __le16 dcid; 355 __le16 scid; 356 } __packed; 357 358 struct l2cap_disconn_rsp { 359 __le16 dcid; 360 __le16 scid; 361 } __packed; 362 363 struct l2cap_info_req { 364 __le16 type; 365 } __packed; 366 367 struct l2cap_info_rsp { 368 __le16 type; 369 __le16 result; 370 __u8 data[0]; 371 } __packed; 372 373 struct l2cap_create_chan_req { 374 __le16 psm; 375 __le16 scid; 376 __u8 amp_id; 377 } __packed; 378 379 struct l2cap_create_chan_rsp { 380 __le16 dcid; 381 __le16 scid; 382 __le16 result; 383 __le16 status; 384 } __packed; 385 386 struct l2cap_move_chan_req { 387 __le16 icid; 388 __u8 dest_amp_id; 389 } __packed; 390 391 struct l2cap_move_chan_rsp { 392 __le16 icid; 393 __le16 result; 394 } __packed; 395 396 #define L2CAP_MR_SUCCESS 0x0000 397 #define L2CAP_MR_PEND 0x0001 398 #define L2CAP_MR_BAD_ID 0x0002 399 #define L2CAP_MR_SAME_ID 0x0003 400 #define L2CAP_MR_NOT_SUPP 0x0004 401 #define L2CAP_MR_COLLISION 0x0005 402 #define L2CAP_MR_NOT_ALLOWED 0x0006 403 404 struct l2cap_move_chan_cfm { 405 __le16 icid; 406 __le16 result; 407 } __packed; 408 409 #define L2CAP_MC_CONFIRMED 0x0000 410 #define L2CAP_MC_UNCONFIRMED 0x0001 411 412 struct l2cap_move_chan_cfm_rsp { 413 __le16 icid; 414 } __packed; 415 416 /* info type */ 417 #define L2CAP_IT_CL_MTU 0x0001 418 #define L2CAP_IT_FEAT_MASK 0x0002 419 #define L2CAP_IT_FIXED_CHAN 0x0003 420 421 /* info result */ 422 #define L2CAP_IR_SUCCESS 0x0000 423 #define L2CAP_IR_NOTSUPP 0x0001 424 425 struct l2cap_conn_param_update_req { 426 __le16 min; 427 __le16 max; 428 __le16 latency; 429 __le16 to_multiplier; 430 } __packed; 431 432 struct l2cap_conn_param_update_rsp { 433 __le16 result; 434 } __packed; 435 436 /* Connection Parameters result */ 437 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 438 #define L2CAP_CONN_PARAM_REJECTED 0x0001 439 440 #define L2CAP_LE_MAX_CREDITS 10 441 #define L2CAP_LE_DEFAULT_MPS 230 442 443 struct l2cap_le_conn_req { 444 __le16 psm; 445 __le16 scid; 446 __le16 mtu; 447 __le16 mps; 448 __le16 credits; 449 } __packed; 450 451 struct l2cap_le_conn_rsp { 452 __le16 dcid; 453 __le16 mtu; 454 __le16 mps; 455 __le16 credits; 456 __le16 result; 457 } __packed; 458 459 struct l2cap_le_credits { 460 __le16 cid; 461 __le16 credits; 462 } __packed; 463 464 /* ----- L2CAP channels and connections ----- */ 465 struct l2cap_seq_list { 466 __u16 head; 467 __u16 tail; 468 __u16 mask; 469 __u16 *list; 470 }; 471 472 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF 473 #define L2CAP_SEQ_LIST_TAIL 0x8000 474 475 struct l2cap_chan { 476 struct l2cap_conn *conn; 477 struct hci_conn *hs_hcon; 478 struct hci_chan *hs_hchan; 479 struct kref kref; 480 481 __u8 state; 482 483 bdaddr_t dst; 484 __u8 dst_type; 485 bdaddr_t src; 486 __u8 src_type; 487 __le16 psm; 488 __le16 sport; 489 __u16 dcid; 490 __u16 scid; 491 492 __u16 imtu; 493 __u16 omtu; 494 __u16 flush_to; 495 __u8 mode; 496 __u8 chan_type; 497 __u8 chan_policy; 498 499 __u8 sec_level; 500 501 __u8 ident; 502 503 __u8 conf_req[64]; 504 __u8 conf_len; 505 __u8 num_conf_req; 506 __u8 num_conf_rsp; 507 508 __u8 fcs; 509 510 __u16 tx_win; 511 __u16 tx_win_max; 512 __u16 ack_win; 513 __u8 max_tx; 514 __u16 retrans_timeout; 515 __u16 monitor_timeout; 516 __u16 mps; 517 518 __u16 tx_credits; 519 __u16 rx_credits; 520 521 __u8 tx_state; 522 __u8 rx_state; 523 524 unsigned long conf_state; 525 unsigned long conn_state; 526 unsigned long flags; 527 528 __u8 remote_amp_id; 529 __u8 local_amp_id; 530 __u8 move_id; 531 __u8 move_state; 532 __u8 move_role; 533 534 __u16 next_tx_seq; 535 __u16 expected_ack_seq; 536 __u16 expected_tx_seq; 537 __u16 buffer_seq; 538 __u16 srej_save_reqseq; 539 __u16 last_acked_seq; 540 __u16 frames_sent; 541 __u16 unacked_frames; 542 __u8 retry_count; 543 __u16 sdu_len; 544 struct sk_buff *sdu; 545 struct sk_buff *sdu_last_frag; 546 547 __u16 remote_tx_win; 548 __u8 remote_max_tx; 549 __u16 remote_mps; 550 551 __u8 local_id; 552 __u8 local_stype; 553 __u16 local_msdu; 554 __u32 local_sdu_itime; 555 __u32 local_acc_lat; 556 __u32 local_flush_to; 557 558 __u8 remote_id; 559 __u8 remote_stype; 560 __u16 remote_msdu; 561 __u32 remote_sdu_itime; 562 __u32 remote_acc_lat; 563 __u32 remote_flush_to; 564 565 struct delayed_work chan_timer; 566 struct delayed_work retrans_timer; 567 struct delayed_work monitor_timer; 568 struct delayed_work ack_timer; 569 570 struct sk_buff *tx_send_head; 571 struct sk_buff_head tx_q; 572 struct sk_buff_head srej_q; 573 struct l2cap_seq_list srej_list; 574 struct l2cap_seq_list retrans_list; 575 576 struct list_head list; 577 struct list_head global_l; 578 579 void *data; 580 struct l2cap_ops *ops; 581 struct mutex lock; 582 }; 583 584 struct l2cap_ops { 585 char *name; 586 587 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 588 int (*recv) (struct l2cap_chan * chan, 589 struct sk_buff *skb); 590 void (*teardown) (struct l2cap_chan *chan, int err); 591 void (*close) (struct l2cap_chan *chan); 592 void (*state_change) (struct l2cap_chan *chan, 593 int state, int err); 594 void (*ready) (struct l2cap_chan *chan); 595 void (*defer) (struct l2cap_chan *chan); 596 void (*resume) (struct l2cap_chan *chan); 597 void (*suspend) (struct l2cap_chan *chan); 598 void (*set_shutdown) (struct l2cap_chan *chan); 599 long (*get_sndtimeo) (struct l2cap_chan *chan); 600 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 601 unsigned long len, int nb); 602 }; 603 604 struct l2cap_conn { 605 struct hci_conn *hcon; 606 struct hci_chan *hchan; 607 608 unsigned int mtu; 609 610 __u32 feat_mask; 611 __u8 fixed_chan_mask; 612 bool hs_enabled; 613 614 __u8 info_state; 615 __u8 info_ident; 616 617 struct delayed_work info_timer; 618 619 spinlock_t lock; 620 621 struct sk_buff *rx_skb; 622 __u32 rx_len; 623 __u8 tx_ident; 624 625 __u8 disc_reason; 626 627 struct delayed_work security_timer; 628 struct smp_chan *smp_chan; 629 630 struct list_head chan_l; 631 struct mutex chan_lock; 632 struct kref ref; 633 struct list_head users; 634 }; 635 636 struct l2cap_user { 637 struct list_head list; 638 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); 639 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); 640 }; 641 642 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 643 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 644 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 645 646 #define L2CAP_CHAN_RAW 1 647 #define L2CAP_CHAN_CONN_LESS 2 648 #define L2CAP_CHAN_CONN_ORIENTED 3 649 #define L2CAP_CHAN_CONN_FIX_A2MP 4 650 651 /* ----- L2CAP socket info ----- */ 652 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 653 654 struct l2cap_pinfo { 655 struct bt_sock bt; 656 struct l2cap_chan *chan; 657 struct sk_buff *rx_busy_skb; 658 }; 659 660 enum { 661 CONF_REQ_SENT, 662 CONF_INPUT_DONE, 663 CONF_OUTPUT_DONE, 664 CONF_MTU_DONE, 665 CONF_MODE_DONE, 666 CONF_CONNECT_PEND, 667 CONF_RECV_NO_FCS, 668 CONF_STATE2_DEVICE, 669 CONF_EWS_RECV, 670 CONF_LOC_CONF_PEND, 671 CONF_REM_CONF_PEND, 672 CONF_NOT_COMPLETE, 673 }; 674 675 #define L2CAP_CONF_MAX_CONF_REQ 2 676 #define L2CAP_CONF_MAX_CONF_RSP 2 677 678 enum { 679 CONN_SREJ_SENT, 680 CONN_WAIT_F, 681 CONN_SREJ_ACT, 682 CONN_SEND_PBIT, 683 CONN_REMOTE_BUSY, 684 CONN_LOCAL_BUSY, 685 CONN_REJ_ACT, 686 CONN_SEND_FBIT, 687 CONN_RNR_SENT, 688 }; 689 690 /* Definitions for flags in l2cap_chan */ 691 enum { 692 FLAG_ROLE_SWITCH, 693 FLAG_FORCE_ACTIVE, 694 FLAG_FORCE_RELIABLE, 695 FLAG_FLUSHABLE, 696 FLAG_EXT_CTRL, 697 FLAG_EFS_ENABLE, 698 FLAG_DEFER_SETUP, 699 FLAG_LE_CONN_REQ_SENT, 700 }; 701 702 enum { 703 L2CAP_TX_STATE_XMIT, 704 L2CAP_TX_STATE_WAIT_F, 705 }; 706 707 enum { 708 L2CAP_RX_STATE_RECV, 709 L2CAP_RX_STATE_SREJ_SENT, 710 L2CAP_RX_STATE_MOVE, 711 L2CAP_RX_STATE_WAIT_P, 712 L2CAP_RX_STATE_WAIT_F, 713 }; 714 715 enum { 716 L2CAP_TXSEQ_EXPECTED, 717 L2CAP_TXSEQ_EXPECTED_SREJ, 718 L2CAP_TXSEQ_UNEXPECTED, 719 L2CAP_TXSEQ_UNEXPECTED_SREJ, 720 L2CAP_TXSEQ_DUPLICATE, 721 L2CAP_TXSEQ_DUPLICATE_SREJ, 722 L2CAP_TXSEQ_INVALID, 723 L2CAP_TXSEQ_INVALID_IGNORE, 724 }; 725 726 enum { 727 L2CAP_EV_DATA_REQUEST, 728 L2CAP_EV_LOCAL_BUSY_DETECTED, 729 L2CAP_EV_LOCAL_BUSY_CLEAR, 730 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 731 L2CAP_EV_RECV_FBIT, 732 L2CAP_EV_RETRANS_TO, 733 L2CAP_EV_MONITOR_TO, 734 L2CAP_EV_EXPLICIT_POLL, 735 L2CAP_EV_RECV_IFRAME, 736 L2CAP_EV_RECV_RR, 737 L2CAP_EV_RECV_REJ, 738 L2CAP_EV_RECV_RNR, 739 L2CAP_EV_RECV_SREJ, 740 L2CAP_EV_RECV_FRAME, 741 }; 742 743 enum { 744 L2CAP_MOVE_ROLE_NONE, 745 L2CAP_MOVE_ROLE_INITIATOR, 746 L2CAP_MOVE_ROLE_RESPONDER, 747 }; 748 749 enum { 750 L2CAP_MOVE_STABLE, 751 L2CAP_MOVE_WAIT_REQ, 752 L2CAP_MOVE_WAIT_RSP, 753 L2CAP_MOVE_WAIT_RSP_SUCCESS, 754 L2CAP_MOVE_WAIT_CONFIRM, 755 L2CAP_MOVE_WAIT_CONFIRM_RSP, 756 L2CAP_MOVE_WAIT_LOGICAL_COMP, 757 L2CAP_MOVE_WAIT_LOGICAL_CFM, 758 L2CAP_MOVE_WAIT_LOCAL_BUSY, 759 L2CAP_MOVE_WAIT_PREPARE, 760 }; 761 762 void l2cap_chan_hold(struct l2cap_chan *c); 763 void l2cap_chan_put(struct l2cap_chan *c); 764 765 static inline void l2cap_chan_lock(struct l2cap_chan *chan) 766 { 767 mutex_lock(&chan->lock); 768 } 769 770 static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 771 { 772 mutex_unlock(&chan->lock); 773 } 774 775 static inline void l2cap_set_timer(struct l2cap_chan *chan, 776 struct delayed_work *work, long timeout) 777 { 778 BT_DBG("chan %p state %s timeout %ld", chan, 779 state_to_string(chan->state), timeout); 780 781 /* If delayed work cancelled do not hold(chan) 782 since it is already done with previous set_timer */ 783 if (!cancel_delayed_work(work)) 784 l2cap_chan_hold(chan); 785 786 schedule_delayed_work(work, timeout); 787 } 788 789 static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 790 struct delayed_work *work) 791 { 792 bool ret; 793 794 /* put(chan) if delayed work cancelled otherwise it 795 is done in delayed work function */ 796 ret = cancel_delayed_work(work); 797 if (ret) 798 l2cap_chan_put(chan); 799 800 return ret; 801 } 802 803 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 804 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 805 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 806 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 807 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 808 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 809 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 810 811 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 812 { 813 if (seq1 >= seq2) 814 return seq1 - seq2; 815 else 816 return chan->tx_win_max + 1 - seq2 + seq1; 817 } 818 819 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 820 { 821 return (seq + 1) % (chan->tx_win_max + 1); 822 } 823 824 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 825 { 826 return NULL; 827 } 828 829 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 830 { 831 } 832 833 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 834 { 835 } 836 837 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) 838 { 839 } 840 841 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) 842 { 843 } 844 845 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) 846 { 847 } 848 849 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) 850 { 851 return 0; 852 } 853 854 extern bool disable_ertm; 855 extern bool enable_lecoc; 856 857 int l2cap_init_sockets(void); 858 void l2cap_cleanup_sockets(void); 859 bool l2cap_is_socket(struct socket *sock); 860 861 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan); 862 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 863 864 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 865 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 866 867 struct l2cap_chan *l2cap_chan_create(void); 868 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 869 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 870 bdaddr_t *dst, u8 dst_type); 871 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len, 872 u32 priority); 873 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 874 int l2cap_chan_check_security(struct l2cap_chan *chan); 875 void l2cap_chan_set_defaults(struct l2cap_chan *chan); 876 void l2cap_le_flowctl_init(struct l2cap_chan *chan); 877 int l2cap_ertm_init(struct l2cap_chan *chan); 878 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 879 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 880 void l2cap_chan_del(struct l2cap_chan *chan, int err); 881 void l2cap_send_conn_req(struct l2cap_chan *chan); 882 void l2cap_move_start(struct l2cap_chan *chan); 883 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, 884 u8 status); 885 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result); 886 887 void l2cap_conn_get(struct l2cap_conn *conn); 888 void l2cap_conn_put(struct l2cap_conn *conn); 889 890 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); 891 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); 892 893 #endif /* __L2CAP_H */ 894