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 #define L2CAP_FC_6LOWPAN 0x3e /* reserved and temporary value */ 140 141 /* L2CAP Control Field bit masks */ 142 #define L2CAP_CTRL_SAR 0xC000 143 #define L2CAP_CTRL_REQSEQ 0x3F00 144 #define L2CAP_CTRL_TXSEQ 0x007E 145 #define L2CAP_CTRL_SUPERVISE 0x000C 146 147 #define L2CAP_CTRL_RETRANS 0x0080 148 #define L2CAP_CTRL_FINAL 0x0080 149 #define L2CAP_CTRL_POLL 0x0010 150 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 151 152 #define L2CAP_CTRL_TXSEQ_SHIFT 1 153 #define L2CAP_CTRL_SUPER_SHIFT 2 154 #define L2CAP_CTRL_POLL_SHIFT 4 155 #define L2CAP_CTRL_FINAL_SHIFT 7 156 #define L2CAP_CTRL_REQSEQ_SHIFT 8 157 #define L2CAP_CTRL_SAR_SHIFT 14 158 159 /* L2CAP Extended Control Field bit mask */ 160 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 161 #define L2CAP_EXT_CTRL_SAR 0x00030000 162 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 163 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 164 165 #define L2CAP_EXT_CTRL_POLL 0x00040000 166 #define L2CAP_EXT_CTRL_FINAL 0x00000002 167 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 168 169 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1 170 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 171 #define L2CAP_EXT_CTRL_SAR_SHIFT 16 172 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 173 #define L2CAP_EXT_CTRL_POLL_SHIFT 18 174 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 175 176 /* L2CAP Supervisory Function */ 177 #define L2CAP_SUPER_RR 0x00 178 #define L2CAP_SUPER_REJ 0x01 179 #define L2CAP_SUPER_RNR 0x02 180 #define L2CAP_SUPER_SREJ 0x03 181 182 /* L2CAP Segmentation and Reassembly */ 183 #define L2CAP_SAR_UNSEGMENTED 0x00 184 #define L2CAP_SAR_START 0x01 185 #define L2CAP_SAR_END 0x02 186 #define L2CAP_SAR_CONTINUE 0x03 187 188 /* L2CAP Command rej. reasons */ 189 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 190 #define L2CAP_REJ_MTU_EXCEEDED 0x0001 191 #define L2CAP_REJ_INVALID_CID 0x0002 192 193 /* L2CAP structures */ 194 struct l2cap_hdr { 195 __le16 len; 196 __le16 cid; 197 } __packed; 198 #define L2CAP_HDR_SIZE 4 199 #define L2CAP_ENH_HDR_SIZE 6 200 #define L2CAP_EXT_HDR_SIZE 8 201 202 #define L2CAP_FCS_SIZE 2 203 #define L2CAP_SDULEN_SIZE 2 204 #define L2CAP_PSMLEN_SIZE 2 205 #define L2CAP_ENH_CTRL_SIZE 2 206 #define L2CAP_EXT_CTRL_SIZE 4 207 208 struct l2cap_cmd_hdr { 209 __u8 code; 210 __u8 ident; 211 __le16 len; 212 } __packed; 213 #define L2CAP_CMD_HDR_SIZE 4 214 215 struct l2cap_cmd_rej_unk { 216 __le16 reason; 217 } __packed; 218 219 struct l2cap_cmd_rej_mtu { 220 __le16 reason; 221 __le16 max_mtu; 222 } __packed; 223 224 struct l2cap_cmd_rej_cid { 225 __le16 reason; 226 __le16 scid; 227 __le16 dcid; 228 } __packed; 229 230 struct l2cap_conn_req { 231 __le16 psm; 232 __le16 scid; 233 } __packed; 234 235 struct l2cap_conn_rsp { 236 __le16 dcid; 237 __le16 scid; 238 __le16 result; 239 __le16 status; 240 } __packed; 241 242 /* protocol/service multiplexer (PSM) */ 243 #define L2CAP_PSM_SDP 0x0001 244 #define L2CAP_PSM_RFCOMM 0x0003 245 #define L2CAP_PSM_3DSP 0x0021 246 247 /* channel identifier */ 248 #define L2CAP_CID_SIGNALING 0x0001 249 #define L2CAP_CID_CONN_LESS 0x0002 250 #define L2CAP_CID_A2MP 0x0003 251 #define L2CAP_CID_ATT 0x0004 252 #define L2CAP_CID_LE_SIGNALING 0x0005 253 #define L2CAP_CID_SMP 0x0006 254 #define L2CAP_CID_DYN_START 0x0040 255 #define L2CAP_CID_DYN_END 0xffff 256 #define L2CAP_CID_LE_DYN_END 0x007f 257 258 /* connect/create channel results */ 259 #define L2CAP_CR_SUCCESS 0x0000 260 #define L2CAP_CR_PEND 0x0001 261 #define L2CAP_CR_BAD_PSM 0x0002 262 #define L2CAP_CR_SEC_BLOCK 0x0003 263 #define L2CAP_CR_NO_MEM 0x0004 264 #define L2CAP_CR_BAD_AMP 0x0005 265 #define L2CAP_CR_AUTHENTICATION 0x0005 266 #define L2CAP_CR_AUTHORIZATION 0x0006 267 #define L2CAP_CR_BAD_KEY_SIZE 0x0007 268 #define L2CAP_CR_ENCRYPTION 0x0008 269 270 /* connect/create channel status */ 271 #define L2CAP_CS_NO_INFO 0x0000 272 #define L2CAP_CS_AUTHEN_PEND 0x0001 273 #define L2CAP_CS_AUTHOR_PEND 0x0002 274 275 struct l2cap_conf_req { 276 __le16 dcid; 277 __le16 flags; 278 __u8 data[0]; 279 } __packed; 280 281 struct l2cap_conf_rsp { 282 __le16 scid; 283 __le16 flags; 284 __le16 result; 285 __u8 data[0]; 286 } __packed; 287 288 #define L2CAP_CONF_SUCCESS 0x0000 289 #define L2CAP_CONF_UNACCEPT 0x0001 290 #define L2CAP_CONF_REJECT 0x0002 291 #define L2CAP_CONF_UNKNOWN 0x0003 292 #define L2CAP_CONF_PENDING 0x0004 293 #define L2CAP_CONF_EFS_REJECT 0x0005 294 295 /* configuration req/rsp continuation flag */ 296 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 297 298 struct l2cap_conf_opt { 299 __u8 type; 300 __u8 len; 301 __u8 val[0]; 302 } __packed; 303 #define L2CAP_CONF_OPT_SIZE 2 304 305 #define L2CAP_CONF_HINT 0x80 306 #define L2CAP_CONF_MASK 0x7f 307 308 #define L2CAP_CONF_MTU 0x01 309 #define L2CAP_CONF_FLUSH_TO 0x02 310 #define L2CAP_CONF_QOS 0x03 311 #define L2CAP_CONF_RFC 0x04 312 #define L2CAP_CONF_FCS 0x05 313 #define L2CAP_CONF_EFS 0x06 314 #define L2CAP_CONF_EWS 0x07 315 316 #define L2CAP_CONF_MAX_SIZE 22 317 318 struct l2cap_conf_rfc { 319 __u8 mode; 320 __u8 txwin_size; 321 __u8 max_transmit; 322 __le16 retrans_timeout; 323 __le16 monitor_timeout; 324 __le16 max_pdu_size; 325 } __packed; 326 327 #define L2CAP_MODE_BASIC 0x00 328 #define L2CAP_MODE_RETRANS 0x01 329 #define L2CAP_MODE_FLOWCTL 0x02 330 #define L2CAP_MODE_ERTM 0x03 331 #define L2CAP_MODE_STREAMING 0x04 332 333 /* Unlike the above this one doesn't actually map to anything that would 334 * ever be sent over the air. Therefore, use a value that's unlikely to 335 * ever be used in the BR/EDR configuration phase. 336 */ 337 #define L2CAP_MODE_LE_FLOWCTL 0x80 338 339 struct l2cap_conf_efs { 340 __u8 id; 341 __u8 stype; 342 __le16 msdu; 343 __le32 sdu_itime; 344 __le32 acc_lat; 345 __le32 flush_to; 346 } __packed; 347 348 #define L2CAP_SERV_NOTRAFIC 0x00 349 #define L2CAP_SERV_BESTEFFORT 0x01 350 #define L2CAP_SERV_GUARANTEED 0x02 351 352 #define L2CAP_BESTEFFORT_ID 0x01 353 354 struct l2cap_disconn_req { 355 __le16 dcid; 356 __le16 scid; 357 } __packed; 358 359 struct l2cap_disconn_rsp { 360 __le16 dcid; 361 __le16 scid; 362 } __packed; 363 364 struct l2cap_info_req { 365 __le16 type; 366 } __packed; 367 368 struct l2cap_info_rsp { 369 __le16 type; 370 __le16 result; 371 __u8 data[0]; 372 } __packed; 373 374 struct l2cap_create_chan_req { 375 __le16 psm; 376 __le16 scid; 377 __u8 amp_id; 378 } __packed; 379 380 struct l2cap_create_chan_rsp { 381 __le16 dcid; 382 __le16 scid; 383 __le16 result; 384 __le16 status; 385 } __packed; 386 387 struct l2cap_move_chan_req { 388 __le16 icid; 389 __u8 dest_amp_id; 390 } __packed; 391 392 struct l2cap_move_chan_rsp { 393 __le16 icid; 394 __le16 result; 395 } __packed; 396 397 #define L2CAP_MR_SUCCESS 0x0000 398 #define L2CAP_MR_PEND 0x0001 399 #define L2CAP_MR_BAD_ID 0x0002 400 #define L2CAP_MR_SAME_ID 0x0003 401 #define L2CAP_MR_NOT_SUPP 0x0004 402 #define L2CAP_MR_COLLISION 0x0005 403 #define L2CAP_MR_NOT_ALLOWED 0x0006 404 405 struct l2cap_move_chan_cfm { 406 __le16 icid; 407 __le16 result; 408 } __packed; 409 410 #define L2CAP_MC_CONFIRMED 0x0000 411 #define L2CAP_MC_UNCONFIRMED 0x0001 412 413 struct l2cap_move_chan_cfm_rsp { 414 __le16 icid; 415 } __packed; 416 417 /* info type */ 418 #define L2CAP_IT_CL_MTU 0x0001 419 #define L2CAP_IT_FEAT_MASK 0x0002 420 #define L2CAP_IT_FIXED_CHAN 0x0003 421 422 /* info result */ 423 #define L2CAP_IR_SUCCESS 0x0000 424 #define L2CAP_IR_NOTSUPP 0x0001 425 426 struct l2cap_conn_param_update_req { 427 __le16 min; 428 __le16 max; 429 __le16 latency; 430 __le16 to_multiplier; 431 } __packed; 432 433 struct l2cap_conn_param_update_rsp { 434 __le16 result; 435 } __packed; 436 437 /* Connection Parameters result */ 438 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 439 #define L2CAP_CONN_PARAM_REJECTED 0x0001 440 441 #define L2CAP_LE_MAX_CREDITS 10 442 #define L2CAP_LE_DEFAULT_MPS 230 443 444 struct l2cap_le_conn_req { 445 __le16 psm; 446 __le16 scid; 447 __le16 mtu; 448 __le16 mps; 449 __le16 credits; 450 } __packed; 451 452 struct l2cap_le_conn_rsp { 453 __le16 dcid; 454 __le16 mtu; 455 __le16 mps; 456 __le16 credits; 457 __le16 result; 458 } __packed; 459 460 struct l2cap_le_credits { 461 __le16 cid; 462 __le16 credits; 463 } __packed; 464 465 /* ----- L2CAP channels and connections ----- */ 466 struct l2cap_seq_list { 467 __u16 head; 468 __u16 tail; 469 __u16 mask; 470 __u16 *list; 471 }; 472 473 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF 474 #define L2CAP_SEQ_LIST_TAIL 0x8000 475 476 struct l2cap_chan { 477 struct l2cap_conn *conn; 478 struct hci_conn *hs_hcon; 479 struct hci_chan *hs_hchan; 480 struct kref kref; 481 482 __u8 state; 483 484 bdaddr_t dst; 485 __u8 dst_type; 486 bdaddr_t src; 487 __u8 src_type; 488 __le16 psm; 489 __le16 sport; 490 __u16 dcid; 491 __u16 scid; 492 493 __u16 imtu; 494 __u16 omtu; 495 __u16 flush_to; 496 __u8 mode; 497 __u8 chan_type; 498 __u8 chan_policy; 499 500 __u8 sec_level; 501 502 __u8 ident; 503 504 __u8 conf_req[64]; 505 __u8 conf_len; 506 __u8 num_conf_req; 507 __u8 num_conf_rsp; 508 509 __u8 fcs; 510 511 __u16 tx_win; 512 __u16 tx_win_max; 513 __u16 ack_win; 514 __u8 max_tx; 515 __u16 retrans_timeout; 516 __u16 monitor_timeout; 517 __u16 mps; 518 519 __u16 tx_credits; 520 __u16 rx_credits; 521 522 __u8 tx_state; 523 __u8 rx_state; 524 525 unsigned long conf_state; 526 unsigned long conn_state; 527 unsigned long flags; 528 529 __u8 remote_amp_id; 530 __u8 local_amp_id; 531 __u8 move_id; 532 __u8 move_state; 533 __u8 move_role; 534 535 __u16 next_tx_seq; 536 __u16 expected_ack_seq; 537 __u16 expected_tx_seq; 538 __u16 buffer_seq; 539 __u16 srej_save_reqseq; 540 __u16 last_acked_seq; 541 __u16 frames_sent; 542 __u16 unacked_frames; 543 __u8 retry_count; 544 __u16 sdu_len; 545 struct sk_buff *sdu; 546 struct sk_buff *sdu_last_frag; 547 548 __u16 remote_tx_win; 549 __u8 remote_max_tx; 550 __u16 remote_mps; 551 552 __u8 local_id; 553 __u8 local_stype; 554 __u16 local_msdu; 555 __u32 local_sdu_itime; 556 __u32 local_acc_lat; 557 __u32 local_flush_to; 558 559 __u8 remote_id; 560 __u8 remote_stype; 561 __u16 remote_msdu; 562 __u32 remote_sdu_itime; 563 __u32 remote_acc_lat; 564 __u32 remote_flush_to; 565 566 struct delayed_work chan_timer; 567 struct delayed_work retrans_timer; 568 struct delayed_work monitor_timer; 569 struct delayed_work ack_timer; 570 571 struct sk_buff *tx_send_head; 572 struct sk_buff_head tx_q; 573 struct sk_buff_head srej_q; 574 struct l2cap_seq_list srej_list; 575 struct l2cap_seq_list retrans_list; 576 577 struct list_head list; 578 struct list_head global_l; 579 580 void *data; 581 struct l2cap_ops *ops; 582 struct mutex lock; 583 }; 584 585 struct l2cap_ops { 586 char *name; 587 588 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 589 int (*recv) (struct l2cap_chan * chan, 590 struct sk_buff *skb); 591 void (*teardown) (struct l2cap_chan *chan, int err); 592 void (*close) (struct l2cap_chan *chan); 593 void (*state_change) (struct l2cap_chan *chan, 594 int state, int err); 595 void (*ready) (struct l2cap_chan *chan); 596 void (*defer) (struct l2cap_chan *chan); 597 void (*resume) (struct l2cap_chan *chan); 598 void (*suspend) (struct l2cap_chan *chan); 599 void (*set_shutdown) (struct l2cap_chan *chan); 600 long (*get_sndtimeo) (struct l2cap_chan *chan); 601 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 602 unsigned long len, int nb); 603 }; 604 605 struct l2cap_conn { 606 struct hci_conn *hcon; 607 struct hci_chan *hchan; 608 609 unsigned int mtu; 610 611 __u32 feat_mask; 612 __u8 fixed_chan_mask; 613 bool hs_enabled; 614 615 __u8 info_state; 616 __u8 info_ident; 617 618 struct delayed_work info_timer; 619 620 spinlock_t lock; 621 622 struct sk_buff *rx_skb; 623 __u32 rx_len; 624 __u8 tx_ident; 625 626 __u8 disc_reason; 627 628 struct delayed_work security_timer; 629 struct smp_chan *smp_chan; 630 631 struct list_head chan_l; 632 struct mutex chan_lock; 633 struct kref ref; 634 struct list_head users; 635 }; 636 637 struct l2cap_user { 638 struct list_head list; 639 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); 640 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); 641 }; 642 643 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 644 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 645 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 646 647 #define L2CAP_CHAN_RAW 1 648 #define L2CAP_CHAN_CONN_LESS 2 649 #define L2CAP_CHAN_CONN_ORIENTED 3 650 #define L2CAP_CHAN_CONN_FIX_A2MP 4 651 652 /* ----- L2CAP socket info ----- */ 653 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 654 655 struct l2cap_pinfo { 656 struct bt_sock bt; 657 struct l2cap_chan *chan; 658 struct sk_buff *rx_busy_skb; 659 }; 660 661 enum { 662 CONF_REQ_SENT, 663 CONF_INPUT_DONE, 664 CONF_OUTPUT_DONE, 665 CONF_MTU_DONE, 666 CONF_MODE_DONE, 667 CONF_CONNECT_PEND, 668 CONF_RECV_NO_FCS, 669 CONF_STATE2_DEVICE, 670 CONF_EWS_RECV, 671 CONF_LOC_CONF_PEND, 672 CONF_REM_CONF_PEND, 673 CONF_NOT_COMPLETE, 674 }; 675 676 #define L2CAP_CONF_MAX_CONF_REQ 2 677 #define L2CAP_CONF_MAX_CONF_RSP 2 678 679 enum { 680 CONN_SREJ_SENT, 681 CONN_WAIT_F, 682 CONN_SREJ_ACT, 683 CONN_SEND_PBIT, 684 CONN_REMOTE_BUSY, 685 CONN_LOCAL_BUSY, 686 CONN_REJ_ACT, 687 CONN_SEND_FBIT, 688 CONN_RNR_SENT, 689 }; 690 691 /* Definitions for flags in l2cap_chan */ 692 enum { 693 FLAG_ROLE_SWITCH, 694 FLAG_FORCE_ACTIVE, 695 FLAG_FORCE_RELIABLE, 696 FLAG_FLUSHABLE, 697 FLAG_EXT_CTRL, 698 FLAG_EFS_ENABLE, 699 FLAG_DEFER_SETUP, 700 FLAG_LE_CONN_REQ_SENT, 701 }; 702 703 enum { 704 L2CAP_TX_STATE_XMIT, 705 L2CAP_TX_STATE_WAIT_F, 706 }; 707 708 enum { 709 L2CAP_RX_STATE_RECV, 710 L2CAP_RX_STATE_SREJ_SENT, 711 L2CAP_RX_STATE_MOVE, 712 L2CAP_RX_STATE_WAIT_P, 713 L2CAP_RX_STATE_WAIT_F, 714 }; 715 716 enum { 717 L2CAP_TXSEQ_EXPECTED, 718 L2CAP_TXSEQ_EXPECTED_SREJ, 719 L2CAP_TXSEQ_UNEXPECTED, 720 L2CAP_TXSEQ_UNEXPECTED_SREJ, 721 L2CAP_TXSEQ_DUPLICATE, 722 L2CAP_TXSEQ_DUPLICATE_SREJ, 723 L2CAP_TXSEQ_INVALID, 724 L2CAP_TXSEQ_INVALID_IGNORE, 725 }; 726 727 enum { 728 L2CAP_EV_DATA_REQUEST, 729 L2CAP_EV_LOCAL_BUSY_DETECTED, 730 L2CAP_EV_LOCAL_BUSY_CLEAR, 731 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 732 L2CAP_EV_RECV_FBIT, 733 L2CAP_EV_RETRANS_TO, 734 L2CAP_EV_MONITOR_TO, 735 L2CAP_EV_EXPLICIT_POLL, 736 L2CAP_EV_RECV_IFRAME, 737 L2CAP_EV_RECV_RR, 738 L2CAP_EV_RECV_REJ, 739 L2CAP_EV_RECV_RNR, 740 L2CAP_EV_RECV_SREJ, 741 L2CAP_EV_RECV_FRAME, 742 }; 743 744 enum { 745 L2CAP_MOVE_ROLE_NONE, 746 L2CAP_MOVE_ROLE_INITIATOR, 747 L2CAP_MOVE_ROLE_RESPONDER, 748 }; 749 750 enum { 751 L2CAP_MOVE_STABLE, 752 L2CAP_MOVE_WAIT_REQ, 753 L2CAP_MOVE_WAIT_RSP, 754 L2CAP_MOVE_WAIT_RSP_SUCCESS, 755 L2CAP_MOVE_WAIT_CONFIRM, 756 L2CAP_MOVE_WAIT_CONFIRM_RSP, 757 L2CAP_MOVE_WAIT_LOGICAL_COMP, 758 L2CAP_MOVE_WAIT_LOGICAL_CFM, 759 L2CAP_MOVE_WAIT_LOCAL_BUSY, 760 L2CAP_MOVE_WAIT_PREPARE, 761 }; 762 763 void l2cap_chan_hold(struct l2cap_chan *c); 764 void l2cap_chan_put(struct l2cap_chan *c); 765 766 static inline void l2cap_chan_lock(struct l2cap_chan *chan) 767 { 768 mutex_lock(&chan->lock); 769 } 770 771 static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 772 { 773 mutex_unlock(&chan->lock); 774 } 775 776 static inline void l2cap_set_timer(struct l2cap_chan *chan, 777 struct delayed_work *work, long timeout) 778 { 779 BT_DBG("chan %p state %s timeout %ld", chan, 780 state_to_string(chan->state), timeout); 781 782 /* If delayed work cancelled do not hold(chan) 783 since it is already done with previous set_timer */ 784 if (!cancel_delayed_work(work)) 785 l2cap_chan_hold(chan); 786 787 schedule_delayed_work(work, timeout); 788 } 789 790 static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 791 struct delayed_work *work) 792 { 793 bool ret; 794 795 /* put(chan) if delayed work cancelled otherwise it 796 is done in delayed work function */ 797 ret = cancel_delayed_work(work); 798 if (ret) 799 l2cap_chan_put(chan); 800 801 return ret; 802 } 803 804 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 805 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 806 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 807 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 808 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 809 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 810 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 811 812 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 813 { 814 if (seq1 >= seq2) 815 return seq1 - seq2; 816 else 817 return chan->tx_win_max + 1 - seq2 + seq1; 818 } 819 820 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 821 { 822 return (seq + 1) % (chan->tx_win_max + 1); 823 } 824 825 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 826 { 827 return NULL; 828 } 829 830 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 831 { 832 } 833 834 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 835 { 836 } 837 838 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) 839 { 840 } 841 842 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) 843 { 844 } 845 846 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) 847 { 848 } 849 850 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) 851 { 852 return 0; 853 } 854 855 extern bool disable_ertm; 856 extern bool enable_lecoc; 857 858 int l2cap_init_sockets(void); 859 void l2cap_cleanup_sockets(void); 860 bool l2cap_is_socket(struct socket *sock); 861 862 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan); 863 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 864 865 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 866 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 867 868 struct l2cap_chan *l2cap_chan_create(void); 869 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 870 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 871 bdaddr_t *dst, u8 dst_type); 872 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len, 873 u32 priority); 874 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 875 int l2cap_chan_check_security(struct l2cap_chan *chan); 876 void l2cap_chan_set_defaults(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