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 #define L2CAP_LM_FIPS 0x0040 95 96 /* L2CAP command codes */ 97 #define L2CAP_COMMAND_REJ 0x01 98 #define L2CAP_CONN_REQ 0x02 99 #define L2CAP_CONN_RSP 0x03 100 #define L2CAP_CONF_REQ 0x04 101 #define L2CAP_CONF_RSP 0x05 102 #define L2CAP_DISCONN_REQ 0x06 103 #define L2CAP_DISCONN_RSP 0x07 104 #define L2CAP_ECHO_REQ 0x08 105 #define L2CAP_ECHO_RSP 0x09 106 #define L2CAP_INFO_REQ 0x0a 107 #define L2CAP_INFO_RSP 0x0b 108 #define L2CAP_CREATE_CHAN_REQ 0x0c 109 #define L2CAP_CREATE_CHAN_RSP 0x0d 110 #define L2CAP_MOVE_CHAN_REQ 0x0e 111 #define L2CAP_MOVE_CHAN_RSP 0x0f 112 #define L2CAP_MOVE_CHAN_CFM 0x10 113 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11 114 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12 115 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13 116 #define L2CAP_LE_CONN_REQ 0x14 117 #define L2CAP_LE_CONN_RSP 0x15 118 #define L2CAP_LE_CREDITS 0x16 119 120 /* L2CAP extended feature mask */ 121 #define L2CAP_FEAT_FLOWCTL 0x00000001 122 #define L2CAP_FEAT_RETRANS 0x00000002 123 #define L2CAP_FEAT_BIDIR_QOS 0x00000004 124 #define L2CAP_FEAT_ERTM 0x00000008 125 #define L2CAP_FEAT_STREAMING 0x00000010 126 #define L2CAP_FEAT_FCS 0x00000020 127 #define L2CAP_FEAT_EXT_FLOW 0x00000040 128 #define L2CAP_FEAT_FIXED_CHAN 0x00000080 129 #define L2CAP_FEAT_EXT_WINDOW 0x00000100 130 #define L2CAP_FEAT_UCD 0x00000200 131 132 /* L2CAP checksum option */ 133 #define L2CAP_FCS_NONE 0x00 134 #define L2CAP_FCS_CRC16 0x01 135 136 /* L2CAP fixed channels */ 137 #define L2CAP_FC_L2CAP 0x02 138 #define L2CAP_FC_CONNLESS 0x04 139 #define L2CAP_FC_A2MP 0x08 140 #define L2CAP_FC_6LOWPAN 0x3e /* reserved and temporary value */ 141 142 /* L2CAP Control Field bit masks */ 143 #define L2CAP_CTRL_SAR 0xC000 144 #define L2CAP_CTRL_REQSEQ 0x3F00 145 #define L2CAP_CTRL_TXSEQ 0x007E 146 #define L2CAP_CTRL_SUPERVISE 0x000C 147 148 #define L2CAP_CTRL_RETRANS 0x0080 149 #define L2CAP_CTRL_FINAL 0x0080 150 #define L2CAP_CTRL_POLL 0x0010 151 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 152 153 #define L2CAP_CTRL_TXSEQ_SHIFT 1 154 #define L2CAP_CTRL_SUPER_SHIFT 2 155 #define L2CAP_CTRL_POLL_SHIFT 4 156 #define L2CAP_CTRL_FINAL_SHIFT 7 157 #define L2CAP_CTRL_REQSEQ_SHIFT 8 158 #define L2CAP_CTRL_SAR_SHIFT 14 159 160 /* L2CAP Extended Control Field bit mask */ 161 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 162 #define L2CAP_EXT_CTRL_SAR 0x00030000 163 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 164 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 165 166 #define L2CAP_EXT_CTRL_POLL 0x00040000 167 #define L2CAP_EXT_CTRL_FINAL 0x00000002 168 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 169 170 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1 171 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 172 #define L2CAP_EXT_CTRL_SAR_SHIFT 16 173 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 174 #define L2CAP_EXT_CTRL_POLL_SHIFT 18 175 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 176 177 /* L2CAP Supervisory Function */ 178 #define L2CAP_SUPER_RR 0x00 179 #define L2CAP_SUPER_REJ 0x01 180 #define L2CAP_SUPER_RNR 0x02 181 #define L2CAP_SUPER_SREJ 0x03 182 183 /* L2CAP Segmentation and Reassembly */ 184 #define L2CAP_SAR_UNSEGMENTED 0x00 185 #define L2CAP_SAR_START 0x01 186 #define L2CAP_SAR_END 0x02 187 #define L2CAP_SAR_CONTINUE 0x03 188 189 /* L2CAP Command rej. reasons */ 190 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 191 #define L2CAP_REJ_MTU_EXCEEDED 0x0001 192 #define L2CAP_REJ_INVALID_CID 0x0002 193 194 /* L2CAP structures */ 195 struct l2cap_hdr { 196 __le16 len; 197 __le16 cid; 198 } __packed; 199 #define L2CAP_HDR_SIZE 4 200 #define L2CAP_ENH_HDR_SIZE 6 201 #define L2CAP_EXT_HDR_SIZE 8 202 203 #define L2CAP_FCS_SIZE 2 204 #define L2CAP_SDULEN_SIZE 2 205 #define L2CAP_PSMLEN_SIZE 2 206 #define L2CAP_ENH_CTRL_SIZE 2 207 #define L2CAP_EXT_CTRL_SIZE 4 208 209 struct l2cap_cmd_hdr { 210 __u8 code; 211 __u8 ident; 212 __le16 len; 213 } __packed; 214 #define L2CAP_CMD_HDR_SIZE 4 215 216 struct l2cap_cmd_rej_unk { 217 __le16 reason; 218 } __packed; 219 220 struct l2cap_cmd_rej_mtu { 221 __le16 reason; 222 __le16 max_mtu; 223 } __packed; 224 225 struct l2cap_cmd_rej_cid { 226 __le16 reason; 227 __le16 scid; 228 __le16 dcid; 229 } __packed; 230 231 struct l2cap_conn_req { 232 __le16 psm; 233 __le16 scid; 234 } __packed; 235 236 struct l2cap_conn_rsp { 237 __le16 dcid; 238 __le16 scid; 239 __le16 result; 240 __le16 status; 241 } __packed; 242 243 /* protocol/service multiplexer (PSM) */ 244 #define L2CAP_PSM_SDP 0x0001 245 #define L2CAP_PSM_RFCOMM 0x0003 246 #define L2CAP_PSM_3DSP 0x0021 247 248 /* channel identifier */ 249 #define L2CAP_CID_SIGNALING 0x0001 250 #define L2CAP_CID_CONN_LESS 0x0002 251 #define L2CAP_CID_A2MP 0x0003 252 #define L2CAP_CID_ATT 0x0004 253 #define L2CAP_CID_LE_SIGNALING 0x0005 254 #define L2CAP_CID_SMP 0x0006 255 #define L2CAP_CID_DYN_START 0x0040 256 #define L2CAP_CID_DYN_END 0xffff 257 #define L2CAP_CID_LE_DYN_END 0x007f 258 259 /* connect/create channel results */ 260 #define L2CAP_CR_SUCCESS 0x0000 261 #define L2CAP_CR_PEND 0x0001 262 #define L2CAP_CR_BAD_PSM 0x0002 263 #define L2CAP_CR_SEC_BLOCK 0x0003 264 #define L2CAP_CR_NO_MEM 0x0004 265 #define L2CAP_CR_BAD_AMP 0x0005 266 #define L2CAP_CR_AUTHENTICATION 0x0005 267 #define L2CAP_CR_AUTHORIZATION 0x0006 268 #define L2CAP_CR_BAD_KEY_SIZE 0x0007 269 #define L2CAP_CR_ENCRYPTION 0x0008 270 271 /* connect/create channel status */ 272 #define L2CAP_CS_NO_INFO 0x0000 273 #define L2CAP_CS_AUTHEN_PEND 0x0001 274 #define L2CAP_CS_AUTHOR_PEND 0x0002 275 276 struct l2cap_conf_req { 277 __le16 dcid; 278 __le16 flags; 279 __u8 data[0]; 280 } __packed; 281 282 struct l2cap_conf_rsp { 283 __le16 scid; 284 __le16 flags; 285 __le16 result; 286 __u8 data[0]; 287 } __packed; 288 289 #define L2CAP_CONF_SUCCESS 0x0000 290 #define L2CAP_CONF_UNACCEPT 0x0001 291 #define L2CAP_CONF_REJECT 0x0002 292 #define L2CAP_CONF_UNKNOWN 0x0003 293 #define L2CAP_CONF_PENDING 0x0004 294 #define L2CAP_CONF_EFS_REJECT 0x0005 295 296 /* configuration req/rsp continuation flag */ 297 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 298 299 struct l2cap_conf_opt { 300 __u8 type; 301 __u8 len; 302 __u8 val[0]; 303 } __packed; 304 #define L2CAP_CONF_OPT_SIZE 2 305 306 #define L2CAP_CONF_HINT 0x80 307 #define L2CAP_CONF_MASK 0x7f 308 309 #define L2CAP_CONF_MTU 0x01 310 #define L2CAP_CONF_FLUSH_TO 0x02 311 #define L2CAP_CONF_QOS 0x03 312 #define L2CAP_CONF_RFC 0x04 313 #define L2CAP_CONF_FCS 0x05 314 #define L2CAP_CONF_EFS 0x06 315 #define L2CAP_CONF_EWS 0x07 316 317 #define L2CAP_CONF_MAX_SIZE 22 318 319 struct l2cap_conf_rfc { 320 __u8 mode; 321 __u8 txwin_size; 322 __u8 max_transmit; 323 __le16 retrans_timeout; 324 __le16 monitor_timeout; 325 __le16 max_pdu_size; 326 } __packed; 327 328 #define L2CAP_MODE_BASIC 0x00 329 #define L2CAP_MODE_RETRANS 0x01 330 #define L2CAP_MODE_FLOWCTL 0x02 331 #define L2CAP_MODE_ERTM 0x03 332 #define L2CAP_MODE_STREAMING 0x04 333 334 /* Unlike the above this one doesn't actually map to anything that would 335 * ever be sent over the air. Therefore, use a value that's unlikely to 336 * ever be used in the BR/EDR configuration phase. 337 */ 338 #define L2CAP_MODE_LE_FLOWCTL 0x80 339 340 struct l2cap_conf_efs { 341 __u8 id; 342 __u8 stype; 343 __le16 msdu; 344 __le32 sdu_itime; 345 __le32 acc_lat; 346 __le32 flush_to; 347 } __packed; 348 349 #define L2CAP_SERV_NOTRAFIC 0x00 350 #define L2CAP_SERV_BESTEFFORT 0x01 351 #define L2CAP_SERV_GUARANTEED 0x02 352 353 #define L2CAP_BESTEFFORT_ID 0x01 354 355 struct l2cap_disconn_req { 356 __le16 dcid; 357 __le16 scid; 358 } __packed; 359 360 struct l2cap_disconn_rsp { 361 __le16 dcid; 362 __le16 scid; 363 } __packed; 364 365 struct l2cap_info_req { 366 __le16 type; 367 } __packed; 368 369 struct l2cap_info_rsp { 370 __le16 type; 371 __le16 result; 372 __u8 data[0]; 373 } __packed; 374 375 struct l2cap_create_chan_req { 376 __le16 psm; 377 __le16 scid; 378 __u8 amp_id; 379 } __packed; 380 381 struct l2cap_create_chan_rsp { 382 __le16 dcid; 383 __le16 scid; 384 __le16 result; 385 __le16 status; 386 } __packed; 387 388 struct l2cap_move_chan_req { 389 __le16 icid; 390 __u8 dest_amp_id; 391 } __packed; 392 393 struct l2cap_move_chan_rsp { 394 __le16 icid; 395 __le16 result; 396 } __packed; 397 398 #define L2CAP_MR_SUCCESS 0x0000 399 #define L2CAP_MR_PEND 0x0001 400 #define L2CAP_MR_BAD_ID 0x0002 401 #define L2CAP_MR_SAME_ID 0x0003 402 #define L2CAP_MR_NOT_SUPP 0x0004 403 #define L2CAP_MR_COLLISION 0x0005 404 #define L2CAP_MR_NOT_ALLOWED 0x0006 405 406 struct l2cap_move_chan_cfm { 407 __le16 icid; 408 __le16 result; 409 } __packed; 410 411 #define L2CAP_MC_CONFIRMED 0x0000 412 #define L2CAP_MC_UNCONFIRMED 0x0001 413 414 struct l2cap_move_chan_cfm_rsp { 415 __le16 icid; 416 } __packed; 417 418 /* info type */ 419 #define L2CAP_IT_CL_MTU 0x0001 420 #define L2CAP_IT_FEAT_MASK 0x0002 421 #define L2CAP_IT_FIXED_CHAN 0x0003 422 423 /* info result */ 424 #define L2CAP_IR_SUCCESS 0x0000 425 #define L2CAP_IR_NOTSUPP 0x0001 426 427 struct l2cap_conn_param_update_req { 428 __le16 min; 429 __le16 max; 430 __le16 latency; 431 __le16 to_multiplier; 432 } __packed; 433 434 struct l2cap_conn_param_update_rsp { 435 __le16 result; 436 } __packed; 437 438 /* Connection Parameters result */ 439 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 440 #define L2CAP_CONN_PARAM_REJECTED 0x0001 441 442 #define L2CAP_LE_MAX_CREDITS 10 443 #define L2CAP_LE_DEFAULT_MPS 230 444 445 struct l2cap_le_conn_req { 446 __le16 psm; 447 __le16 scid; 448 __le16 mtu; 449 __le16 mps; 450 __le16 credits; 451 } __packed; 452 453 struct l2cap_le_conn_rsp { 454 __le16 dcid; 455 __le16 mtu; 456 __le16 mps; 457 __le16 credits; 458 __le16 result; 459 } __packed; 460 461 struct l2cap_le_credits { 462 __le16 cid; 463 __le16 credits; 464 } __packed; 465 466 /* ----- L2CAP channels and connections ----- */ 467 struct l2cap_seq_list { 468 __u16 head; 469 __u16 tail; 470 __u16 mask; 471 __u16 *list; 472 }; 473 474 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF 475 #define L2CAP_SEQ_LIST_TAIL 0x8000 476 477 struct l2cap_chan { 478 struct l2cap_conn *conn; 479 struct hci_conn *hs_hcon; 480 struct hci_chan *hs_hchan; 481 struct kref kref; 482 483 __u8 state; 484 485 bdaddr_t dst; 486 __u8 dst_type; 487 bdaddr_t src; 488 __u8 src_type; 489 __le16 psm; 490 __le16 sport; 491 __u16 dcid; 492 __u16 scid; 493 494 __u16 imtu; 495 __u16 omtu; 496 __u16 flush_to; 497 __u8 mode; 498 __u8 chan_type; 499 __u8 chan_policy; 500 501 __u8 sec_level; 502 503 __u8 ident; 504 505 __u8 conf_req[64]; 506 __u8 conf_len; 507 __u8 num_conf_req; 508 __u8 num_conf_rsp; 509 510 __u8 fcs; 511 512 __u16 tx_win; 513 __u16 tx_win_max; 514 __u16 ack_win; 515 __u8 max_tx; 516 __u16 retrans_timeout; 517 __u16 monitor_timeout; 518 __u16 mps; 519 520 __u16 tx_credits; 521 __u16 rx_credits; 522 523 __u8 tx_state; 524 __u8 rx_state; 525 526 unsigned long conf_state; 527 unsigned long conn_state; 528 unsigned long flags; 529 530 __u8 remote_amp_id; 531 __u8 local_amp_id; 532 __u8 move_id; 533 __u8 move_state; 534 __u8 move_role; 535 536 __u16 next_tx_seq; 537 __u16 expected_ack_seq; 538 __u16 expected_tx_seq; 539 __u16 buffer_seq; 540 __u16 srej_save_reqseq; 541 __u16 last_acked_seq; 542 __u16 frames_sent; 543 __u16 unacked_frames; 544 __u8 retry_count; 545 __u16 sdu_len; 546 struct sk_buff *sdu; 547 struct sk_buff *sdu_last_frag; 548 549 __u16 remote_tx_win; 550 __u8 remote_max_tx; 551 __u16 remote_mps; 552 553 __u8 local_id; 554 __u8 local_stype; 555 __u16 local_msdu; 556 __u32 local_sdu_itime; 557 __u32 local_acc_lat; 558 __u32 local_flush_to; 559 560 __u8 remote_id; 561 __u8 remote_stype; 562 __u16 remote_msdu; 563 __u32 remote_sdu_itime; 564 __u32 remote_acc_lat; 565 __u32 remote_flush_to; 566 567 struct delayed_work chan_timer; 568 struct delayed_work retrans_timer; 569 struct delayed_work monitor_timer; 570 struct delayed_work ack_timer; 571 572 struct sk_buff *tx_send_head; 573 struct sk_buff_head tx_q; 574 struct sk_buff_head srej_q; 575 struct l2cap_seq_list srej_list; 576 struct l2cap_seq_list retrans_list; 577 578 struct list_head list; 579 struct list_head global_l; 580 581 void *data; 582 struct l2cap_ops *ops; 583 struct mutex lock; 584 }; 585 586 struct l2cap_ops { 587 char *name; 588 589 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 590 int (*recv) (struct l2cap_chan * chan, 591 struct sk_buff *skb); 592 void (*teardown) (struct l2cap_chan *chan, int err); 593 void (*close) (struct l2cap_chan *chan); 594 void (*state_change) (struct l2cap_chan *chan, 595 int state, int err); 596 void (*ready) (struct l2cap_chan *chan); 597 void (*defer) (struct l2cap_chan *chan); 598 void (*resume) (struct l2cap_chan *chan); 599 void (*suspend) (struct l2cap_chan *chan); 600 void (*set_shutdown) (struct l2cap_chan *chan); 601 long (*get_sndtimeo) (struct l2cap_chan *chan); 602 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 603 unsigned long len, int nb); 604 }; 605 606 struct l2cap_conn { 607 struct hci_conn *hcon; 608 struct hci_chan *hchan; 609 610 unsigned int mtu; 611 612 __u32 feat_mask; 613 __u8 fixed_chan_mask; 614 bool hs_enabled; 615 616 __u8 info_state; 617 __u8 info_ident; 618 619 struct delayed_work info_timer; 620 621 spinlock_t lock; 622 623 struct sk_buff *rx_skb; 624 __u32 rx_len; 625 __u8 tx_ident; 626 627 struct sk_buff_head pending_rx; 628 struct work_struct pending_rx_work; 629 630 __u8 disc_reason; 631 632 struct delayed_work security_timer; 633 struct smp_chan *smp_chan; 634 635 struct list_head chan_l; 636 struct mutex chan_lock; 637 struct kref ref; 638 struct list_head users; 639 }; 640 641 struct l2cap_user { 642 struct list_head list; 643 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); 644 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); 645 }; 646 647 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 648 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 649 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 650 651 #define L2CAP_CHAN_RAW 1 652 #define L2CAP_CHAN_CONN_LESS 2 653 #define L2CAP_CHAN_CONN_ORIENTED 3 654 #define L2CAP_CHAN_FIXED 4 655 656 /* ----- L2CAP socket info ----- */ 657 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 658 659 struct l2cap_pinfo { 660 struct bt_sock bt; 661 struct l2cap_chan *chan; 662 struct sk_buff *rx_busy_skb; 663 }; 664 665 enum { 666 CONF_REQ_SENT, 667 CONF_INPUT_DONE, 668 CONF_OUTPUT_DONE, 669 CONF_MTU_DONE, 670 CONF_MODE_DONE, 671 CONF_CONNECT_PEND, 672 CONF_RECV_NO_FCS, 673 CONF_STATE2_DEVICE, 674 CONF_EWS_RECV, 675 CONF_LOC_CONF_PEND, 676 CONF_REM_CONF_PEND, 677 CONF_NOT_COMPLETE, 678 }; 679 680 #define L2CAP_CONF_MAX_CONF_REQ 2 681 #define L2CAP_CONF_MAX_CONF_RSP 2 682 683 enum { 684 CONN_SREJ_SENT, 685 CONN_WAIT_F, 686 CONN_SREJ_ACT, 687 CONN_SEND_PBIT, 688 CONN_REMOTE_BUSY, 689 CONN_LOCAL_BUSY, 690 CONN_REJ_ACT, 691 CONN_SEND_FBIT, 692 CONN_RNR_SENT, 693 }; 694 695 /* Definitions for flags in l2cap_chan */ 696 enum { 697 FLAG_ROLE_SWITCH, 698 FLAG_FORCE_ACTIVE, 699 FLAG_FORCE_RELIABLE, 700 FLAG_FLUSHABLE, 701 FLAG_EXT_CTRL, 702 FLAG_EFS_ENABLE, 703 FLAG_DEFER_SETUP, 704 FLAG_LE_CONN_REQ_SENT, 705 }; 706 707 enum { 708 L2CAP_TX_STATE_XMIT, 709 L2CAP_TX_STATE_WAIT_F, 710 }; 711 712 enum { 713 L2CAP_RX_STATE_RECV, 714 L2CAP_RX_STATE_SREJ_SENT, 715 L2CAP_RX_STATE_MOVE, 716 L2CAP_RX_STATE_WAIT_P, 717 L2CAP_RX_STATE_WAIT_F, 718 }; 719 720 enum { 721 L2CAP_TXSEQ_EXPECTED, 722 L2CAP_TXSEQ_EXPECTED_SREJ, 723 L2CAP_TXSEQ_UNEXPECTED, 724 L2CAP_TXSEQ_UNEXPECTED_SREJ, 725 L2CAP_TXSEQ_DUPLICATE, 726 L2CAP_TXSEQ_DUPLICATE_SREJ, 727 L2CAP_TXSEQ_INVALID, 728 L2CAP_TXSEQ_INVALID_IGNORE, 729 }; 730 731 enum { 732 L2CAP_EV_DATA_REQUEST, 733 L2CAP_EV_LOCAL_BUSY_DETECTED, 734 L2CAP_EV_LOCAL_BUSY_CLEAR, 735 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 736 L2CAP_EV_RECV_FBIT, 737 L2CAP_EV_RETRANS_TO, 738 L2CAP_EV_MONITOR_TO, 739 L2CAP_EV_EXPLICIT_POLL, 740 L2CAP_EV_RECV_IFRAME, 741 L2CAP_EV_RECV_RR, 742 L2CAP_EV_RECV_REJ, 743 L2CAP_EV_RECV_RNR, 744 L2CAP_EV_RECV_SREJ, 745 L2CAP_EV_RECV_FRAME, 746 }; 747 748 enum { 749 L2CAP_MOVE_ROLE_NONE, 750 L2CAP_MOVE_ROLE_INITIATOR, 751 L2CAP_MOVE_ROLE_RESPONDER, 752 }; 753 754 enum { 755 L2CAP_MOVE_STABLE, 756 L2CAP_MOVE_WAIT_REQ, 757 L2CAP_MOVE_WAIT_RSP, 758 L2CAP_MOVE_WAIT_RSP_SUCCESS, 759 L2CAP_MOVE_WAIT_CONFIRM, 760 L2CAP_MOVE_WAIT_CONFIRM_RSP, 761 L2CAP_MOVE_WAIT_LOGICAL_COMP, 762 L2CAP_MOVE_WAIT_LOGICAL_CFM, 763 L2CAP_MOVE_WAIT_LOCAL_BUSY, 764 L2CAP_MOVE_WAIT_PREPARE, 765 }; 766 767 void l2cap_chan_hold(struct l2cap_chan *c); 768 void l2cap_chan_put(struct l2cap_chan *c); 769 770 static inline void l2cap_chan_lock(struct l2cap_chan *chan) 771 { 772 mutex_lock(&chan->lock); 773 } 774 775 static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 776 { 777 mutex_unlock(&chan->lock); 778 } 779 780 static inline void l2cap_set_timer(struct l2cap_chan *chan, 781 struct delayed_work *work, long timeout) 782 { 783 BT_DBG("chan %p state %s timeout %ld", chan, 784 state_to_string(chan->state), timeout); 785 786 /* If delayed work cancelled do not hold(chan) 787 since it is already done with previous set_timer */ 788 if (!cancel_delayed_work(work)) 789 l2cap_chan_hold(chan); 790 791 schedule_delayed_work(work, timeout); 792 } 793 794 static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 795 struct delayed_work *work) 796 { 797 bool ret; 798 799 /* put(chan) if delayed work cancelled otherwise it 800 is done in delayed work function */ 801 ret = cancel_delayed_work(work); 802 if (ret) 803 l2cap_chan_put(chan); 804 805 return ret; 806 } 807 808 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 809 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 810 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 811 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 812 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 813 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 814 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 815 816 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 817 { 818 if (seq1 >= seq2) 819 return seq1 - seq2; 820 else 821 return chan->tx_win_max + 1 - seq2 + seq1; 822 } 823 824 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 825 { 826 return (seq + 1) % (chan->tx_win_max + 1); 827 } 828 829 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 830 { 831 return NULL; 832 } 833 834 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 835 { 836 } 837 838 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 839 { 840 } 841 842 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) 843 { 844 } 845 846 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) 847 { 848 } 849 850 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) 851 { 852 } 853 854 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) 855 { 856 return 0; 857 } 858 859 extern bool disable_ertm; 860 861 int l2cap_init_sockets(void); 862 void l2cap_cleanup_sockets(void); 863 bool l2cap_is_socket(struct socket *sock); 864 865 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan); 866 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 867 868 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 869 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 870 871 struct l2cap_chan *l2cap_chan_create(void); 872 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 873 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 874 bdaddr_t *dst, u8 dst_type); 875 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len, 876 u32 priority); 877 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 878 int l2cap_chan_check_security(struct l2cap_chan *chan); 879 void l2cap_chan_set_defaults(struct l2cap_chan *chan); 880 int l2cap_ertm_init(struct l2cap_chan *chan); 881 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 882 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 883 void l2cap_chan_del(struct l2cap_chan *chan, int err); 884 void l2cap_conn_update_id_addr(struct hci_conn *hcon); 885 void l2cap_send_conn_req(struct l2cap_chan *chan); 886 void l2cap_move_start(struct l2cap_chan *chan); 887 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, 888 u8 status); 889 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result); 890 891 void l2cap_conn_get(struct l2cap_conn *conn); 892 void l2cap_conn_put(struct l2cap_conn *conn); 893 894 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); 895 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); 896 897 #endif /* __L2CAP_H */ 898