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 <linux/unaligned.h> 31 #include <linux/atomic.h> 32 33 /* L2CAP defaults */ 34 #define L2CAP_DEFAULT_MTU 672 35 #define L2CAP_DEFAULT_MIN_MTU 48 36 #define L2CAP_SIG_MTU 48 /* BR/EDR signaling MTU */ 37 #define L2CAP_DEFAULT_FLUSH_TO 0xFFFF 38 #define L2CAP_EFS_DEFAULT_FLUSH_TO 0xFFFFFFFF 39 #define L2CAP_DEFAULT_TX_WINDOW 63 40 #define L2CAP_DEFAULT_EXT_WINDOW 0x3FFF 41 #define L2CAP_DEFAULT_MAX_TX 3 42 #define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */ 43 #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */ 44 #define L2CAP_DEFAULT_MAX_PDU_SIZE 1492 /* Sized for AMP packet */ 45 #define L2CAP_DEFAULT_ACK_TO 200 46 #define L2CAP_DEFAULT_MAX_SDU_SIZE 0xFFFF 47 #define L2CAP_DEFAULT_SDU_ITIME 0xFFFFFFFF 48 #define L2CAP_DEFAULT_ACC_LAT 0xFFFFFFFF 49 #define L2CAP_BREDR_MAX_PAYLOAD 1019 /* 3-DH5 packet */ 50 #define L2CAP_LE_MIN_MTU 23 51 #define L2CAP_ECRED_CONN_SCID_MAX 5 52 53 #define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100) 54 #define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000) 55 #define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000) 56 #define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000) 57 #define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000) 58 #define L2CAP_MOVE_TIMEOUT msecs_to_jiffies(4000) 59 #define L2CAP_MOVE_ERTX_TIMEOUT msecs_to_jiffies(60000) 60 #define L2CAP_WAIT_ACK_POLL_PERIOD msecs_to_jiffies(200) 61 #define L2CAP_WAIT_ACK_TIMEOUT msecs_to_jiffies(10000) 62 63 /* L2CAP socket address */ 64 struct sockaddr_l2 { 65 sa_family_t l2_family; 66 __le16 l2_psm; 67 bdaddr_t l2_bdaddr; 68 __le16 l2_cid; 69 __u8 l2_bdaddr_type; 70 }; 71 72 /* L2CAP socket options */ 73 #define L2CAP_OPTIONS 0x01 74 struct l2cap_options { 75 __u16 omtu; 76 __u16 imtu; 77 __u16 flush_to; 78 __u8 mode; 79 __u8 fcs; 80 __u8 max_tx; 81 __u16 txwin_size; 82 }; 83 84 #define L2CAP_CONNINFO 0x02 85 struct l2cap_conninfo { 86 __u16 hci_handle; 87 __u8 dev_class[3]; 88 }; 89 90 #define L2CAP_LM 0x03 91 #define L2CAP_LM_MASTER 0x0001 92 #define L2CAP_LM_AUTH 0x0002 93 #define L2CAP_LM_ENCRYPT 0x0004 94 #define L2CAP_LM_TRUSTED 0x0008 95 #define L2CAP_LM_RELIABLE 0x0010 96 #define L2CAP_LM_SECURE 0x0020 97 #define L2CAP_LM_FIPS 0x0040 98 99 /* L2CAP command codes */ 100 #define L2CAP_COMMAND_REJ 0x01 101 #define L2CAP_CONN_REQ 0x02 102 #define L2CAP_CONN_RSP 0x03 103 #define L2CAP_CONF_REQ 0x04 104 #define L2CAP_CONF_RSP 0x05 105 #define L2CAP_DISCONN_REQ 0x06 106 #define L2CAP_DISCONN_RSP 0x07 107 #define L2CAP_ECHO_REQ 0x08 108 #define L2CAP_ECHO_RSP 0x09 109 #define L2CAP_INFO_REQ 0x0a 110 #define L2CAP_INFO_RSP 0x0b 111 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12 112 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13 113 #define L2CAP_LE_CONN_REQ 0x14 114 #define L2CAP_LE_CONN_RSP 0x15 115 #define L2CAP_LE_CREDITS 0x16 116 #define L2CAP_ECRED_CONN_REQ 0x17 117 #define L2CAP_ECRED_CONN_RSP 0x18 118 #define L2CAP_ECRED_RECONF_REQ 0x19 119 #define L2CAP_ECRED_RECONF_RSP 0x1a 120 121 /* L2CAP extended feature mask */ 122 #define L2CAP_FEAT_FLOWCTL 0x00000001 123 #define L2CAP_FEAT_RETRANS 0x00000002 124 #define L2CAP_FEAT_BIDIR_QOS 0x00000004 125 #define L2CAP_FEAT_ERTM 0x00000008 126 #define L2CAP_FEAT_STREAMING 0x00000010 127 #define L2CAP_FEAT_FCS 0x00000020 128 #define L2CAP_FEAT_EXT_FLOW 0x00000040 129 #define L2CAP_FEAT_FIXED_CHAN 0x00000080 130 #define L2CAP_FEAT_EXT_WINDOW 0x00000100 131 #define L2CAP_FEAT_UCD 0x00000200 132 133 /* L2CAP checksum option */ 134 #define L2CAP_FCS_NONE 0x00 135 #define L2CAP_FCS_CRC16 0x01 136 137 /* L2CAP fixed channels */ 138 #define L2CAP_FC_SIG_BREDR 0x02 139 #define L2CAP_FC_CONNLESS 0x04 140 #define L2CAP_FC_ATT 0x10 141 #define L2CAP_FC_SIG_LE 0x20 142 #define L2CAP_FC_SMP_LE 0x40 143 #define L2CAP_FC_SMP_BREDR 0x80 144 145 /* L2CAP Control Field bit masks */ 146 #define L2CAP_CTRL_SAR 0xC000 147 #define L2CAP_CTRL_REQSEQ 0x3F00 148 #define L2CAP_CTRL_TXSEQ 0x007E 149 #define L2CAP_CTRL_SUPERVISE 0x000C 150 151 #define L2CAP_CTRL_RETRANS 0x0080 152 #define L2CAP_CTRL_FINAL 0x0080 153 #define L2CAP_CTRL_POLL 0x0010 154 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 155 156 #define L2CAP_CTRL_TXSEQ_SHIFT 1 157 #define L2CAP_CTRL_SUPER_SHIFT 2 158 #define L2CAP_CTRL_POLL_SHIFT 4 159 #define L2CAP_CTRL_FINAL_SHIFT 7 160 #define L2CAP_CTRL_REQSEQ_SHIFT 8 161 #define L2CAP_CTRL_SAR_SHIFT 14 162 163 /* L2CAP Extended Control Field bit mask */ 164 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 165 #define L2CAP_EXT_CTRL_SAR 0x00030000 166 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 167 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 168 169 #define L2CAP_EXT_CTRL_POLL 0x00040000 170 #define L2CAP_EXT_CTRL_FINAL 0x00000002 171 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 172 173 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1 174 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 175 #define L2CAP_EXT_CTRL_SAR_SHIFT 16 176 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 177 #define L2CAP_EXT_CTRL_POLL_SHIFT 18 178 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 179 180 /* L2CAP Supervisory Function */ 181 #define L2CAP_SUPER_RR 0x00 182 #define L2CAP_SUPER_REJ 0x01 183 #define L2CAP_SUPER_RNR 0x02 184 #define L2CAP_SUPER_SREJ 0x03 185 186 /* L2CAP Segmentation and Reassembly */ 187 #define L2CAP_SAR_UNSEGMENTED 0x00 188 #define L2CAP_SAR_START 0x01 189 #define L2CAP_SAR_END 0x02 190 #define L2CAP_SAR_CONTINUE 0x03 191 192 /* L2CAP Command rej. reasons */ 193 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 194 #define L2CAP_REJ_MTU_EXCEEDED 0x0001 195 #define L2CAP_REJ_INVALID_CID 0x0002 196 197 /* L2CAP structures */ 198 struct l2cap_hdr { 199 __le16 len; 200 __le16 cid; 201 } __packed; 202 #define L2CAP_LEN_SIZE 2 203 #define L2CAP_HDR_SIZE 4 204 #define L2CAP_ENH_HDR_SIZE 6 205 #define L2CAP_EXT_HDR_SIZE 8 206 207 #define L2CAP_FCS_SIZE 2 208 #define L2CAP_SDULEN_SIZE 2 209 #define L2CAP_PSMLEN_SIZE 2 210 #define L2CAP_ENH_CTRL_SIZE 2 211 #define L2CAP_EXT_CTRL_SIZE 4 212 213 struct l2cap_cmd_hdr { 214 __u8 code; 215 __u8 ident; 216 __le16 len; 217 } __packed; 218 #define L2CAP_CMD_HDR_SIZE 4 219 220 struct l2cap_cmd_rej_unk { 221 __le16 reason; 222 } __packed; 223 224 struct l2cap_cmd_rej_mtu { 225 __le16 reason; 226 __le16 max_mtu; 227 } __packed; 228 229 struct l2cap_cmd_rej_cid { 230 __le16 reason; 231 __le16 scid; 232 __le16 dcid; 233 } __packed; 234 235 struct l2cap_conn_req { 236 __le16 psm; 237 __le16 scid; 238 } __packed; 239 240 struct l2cap_conn_rsp { 241 __le16 dcid; 242 __le16 scid; 243 __le16 result; 244 __le16 status; 245 } __packed; 246 247 /* protocol/service multiplexer (PSM) */ 248 #define L2CAP_PSM_SDP 0x0001 249 #define L2CAP_PSM_RFCOMM 0x0003 250 #define L2CAP_PSM_3DSP 0x0021 251 #define L2CAP_PSM_IPSP 0x0023 /* 6LoWPAN */ 252 253 #define L2CAP_PSM_DYN_START 0x1001 254 #define L2CAP_PSM_DYN_END 0xffff 255 #define L2CAP_PSM_AUTO_END 0x10ff 256 #define L2CAP_PSM_LE_DYN_START 0x0080 257 #define L2CAP_PSM_LE_DYN_END 0x00ff 258 259 /* channel identifier */ 260 #define L2CAP_CID_SIGNALING 0x0001 261 #define L2CAP_CID_CONN_LESS 0x0002 262 #define L2CAP_CID_ATT 0x0004 263 #define L2CAP_CID_LE_SIGNALING 0x0005 264 #define L2CAP_CID_SMP 0x0006 265 #define L2CAP_CID_SMP_BREDR 0x0007 266 #define L2CAP_CID_DYN_START 0x0040 267 #define L2CAP_CID_DYN_END 0xffff 268 #define L2CAP_CID_LE_DYN_END 0x007f 269 270 /* connect/create channel results */ 271 #define L2CAP_CR_SUCCESS 0x0000 272 #define L2CAP_CR_PEND 0x0001 273 #define L2CAP_CR_BAD_PSM 0x0002 274 #define L2CAP_CR_SEC_BLOCK 0x0003 275 #define L2CAP_CR_NO_MEM 0x0004 276 #define L2CAP_CR_INVALID_SCID 0x0006 277 #define L2CAP_CR_SCID_IN_USE 0x0007 278 279 /* credit based connect results */ 280 #define L2CAP_CR_LE_SUCCESS 0x0000 281 #define L2CAP_CR_LE_BAD_PSM 0x0002 282 #define L2CAP_CR_LE_NO_MEM 0x0004 283 #define L2CAP_CR_LE_AUTHENTICATION 0x0005 284 #define L2CAP_CR_LE_AUTHORIZATION 0x0006 285 #define L2CAP_CR_LE_BAD_KEY_SIZE 0x0007 286 #define L2CAP_CR_LE_ENCRYPTION 0x0008 287 #define L2CAP_CR_LE_INVALID_SCID 0x0009 288 #define L2CAP_CR_LE_SCID_IN_USE 0x000A 289 #define L2CAP_CR_LE_UNACCEPT_PARAMS 0x000B 290 #define L2CAP_CR_LE_INVALID_PARAMS 0x000C 291 292 /* connect/create channel status */ 293 #define L2CAP_CS_NO_INFO 0x0000 294 #define L2CAP_CS_AUTHEN_PEND 0x0001 295 #define L2CAP_CS_AUTHOR_PEND 0x0002 296 297 struct l2cap_conf_req { 298 __le16 dcid; 299 __le16 flags; 300 __u8 data[]; 301 } __packed; 302 303 struct l2cap_conf_rsp { 304 __le16 scid; 305 __le16 flags; 306 __le16 result; 307 __u8 data[]; 308 } __packed; 309 310 #define L2CAP_CONF_SUCCESS 0x0000 311 #define L2CAP_CONF_UNACCEPT 0x0001 312 #define L2CAP_CONF_REJECT 0x0002 313 #define L2CAP_CONF_UNKNOWN 0x0003 314 #define L2CAP_CONF_PENDING 0x0004 315 #define L2CAP_CONF_EFS_REJECT 0x0005 316 317 /* configuration req/rsp continuation flag */ 318 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 319 320 struct l2cap_conf_opt { 321 __u8 type; 322 __u8 len; 323 __u8 val[]; 324 } __packed; 325 #define L2CAP_CONF_OPT_SIZE 2 326 327 #define L2CAP_CONF_HINT 0x80 328 #define L2CAP_CONF_MASK 0x7f 329 330 #define L2CAP_CONF_MTU 0x01 331 #define L2CAP_CONF_FLUSH_TO 0x02 332 #define L2CAP_CONF_QOS 0x03 333 #define L2CAP_CONF_RFC 0x04 334 #define L2CAP_CONF_FCS 0x05 335 #define L2CAP_CONF_EFS 0x06 336 #define L2CAP_CONF_EWS 0x07 337 338 #define L2CAP_CONF_MAX_SIZE 22 339 340 struct l2cap_conf_rfc { 341 __u8 mode; 342 __u8 txwin_size; 343 __u8 max_transmit; 344 __le16 retrans_timeout; 345 __le16 monitor_timeout; 346 __le16 max_pdu_size; 347 } __packed; 348 349 #define L2CAP_MODE_BASIC 0x00 350 #define L2CAP_MODE_RETRANS 0x01 351 #define L2CAP_MODE_FLOWCTL 0x02 352 #define L2CAP_MODE_ERTM 0x03 353 #define L2CAP_MODE_STREAMING 0x04 354 355 /* Unlike the above this one doesn't actually map to anything that would 356 * ever be sent over the air. Therefore, use a value that's unlikely to 357 * ever be used in the BR/EDR configuration phase. 358 */ 359 #define L2CAP_MODE_LE_FLOWCTL 0x80 360 #define L2CAP_MODE_EXT_FLOWCTL 0x81 361 362 struct l2cap_conf_efs { 363 __u8 id; 364 __u8 stype; 365 __le16 msdu; 366 __le32 sdu_itime; 367 __le32 acc_lat; 368 __le32 flush_to; 369 } __packed; 370 371 #define L2CAP_SERV_NOTRAFIC 0x00 372 #define L2CAP_SERV_BESTEFFORT 0x01 373 #define L2CAP_SERV_GUARANTEED 0x02 374 375 #define L2CAP_BESTEFFORT_ID 0x01 376 377 struct l2cap_disconn_req { 378 __le16 dcid; 379 __le16 scid; 380 } __packed; 381 382 struct l2cap_disconn_rsp { 383 __le16 dcid; 384 __le16 scid; 385 } __packed; 386 387 struct l2cap_info_req { 388 __le16 type; 389 } __packed; 390 391 struct l2cap_info_rsp { 392 __le16 type; 393 __le16 result; 394 __u8 data[]; 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 struct l2cap_le_conn_req { 442 __le16 psm; 443 __le16 scid; 444 __le16 mtu; 445 __le16 mps; 446 __le16 credits; 447 } __packed; 448 449 struct l2cap_le_conn_rsp { 450 __le16 dcid; 451 __le16 mtu; 452 __le16 mps; 453 __le16 credits; 454 __le16 result; 455 } __packed; 456 457 struct l2cap_le_credits { 458 __le16 cid; 459 __le16 credits; 460 } __packed; 461 462 #define L2CAP_ECRED_MIN_MTU 64 463 #define L2CAP_ECRED_MIN_MPS 64 464 #define L2CAP_ECRED_MAX_CID 5 465 466 struct l2cap_ecred_conn_req { 467 /* New members must be added within the struct_group() macro below. */ 468 __struct_group(l2cap_ecred_conn_req_hdr, hdr, __packed, 469 __le16 psm; 470 __le16 mtu; 471 __le16 mps; 472 __le16 credits; 473 ); 474 __le16 scid[]; 475 } __packed; 476 477 struct l2cap_ecred_conn_rsp { 478 /* New members must be added within the struct_group() macro below. */ 479 struct_group_tagged(l2cap_ecred_conn_rsp_hdr, hdr, 480 __le16 mtu; 481 __le16 mps; 482 __le16 credits; 483 __le16 result; 484 ); 485 __le16 dcid[]; 486 }; 487 488 struct l2cap_ecred_reconf_req { 489 __le16 mtu; 490 __le16 mps; 491 __le16 scid[]; 492 } __packed; 493 494 #define L2CAP_RECONF_SUCCESS 0x0000 495 #define L2CAP_RECONF_INVALID_MTU 0x0001 496 #define L2CAP_RECONF_INVALID_MPS 0x0002 497 #define L2CAP_RECONF_INVALID_CID 0x0003 498 #define L2CAP_RECONF_INVALID_PARAMS 0x0004 499 500 struct l2cap_ecred_reconf_rsp { 501 __le16 result; 502 } __packed; 503 504 /* ----- L2CAP channels and connections ----- */ 505 struct l2cap_seq_list { 506 __u16 head; 507 __u16 tail; 508 __u16 mask; 509 __u16 *list; 510 }; 511 512 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF 513 #define L2CAP_SEQ_LIST_TAIL 0x8000 514 515 struct l2cap_chan { 516 struct l2cap_conn *conn; 517 struct kref kref; 518 atomic_t nesting; 519 520 __u8 state; 521 522 bdaddr_t dst; 523 __u8 dst_type; 524 bdaddr_t src; 525 __u8 src_type; 526 __le16 psm; 527 __le16 sport; 528 __u16 dcid; 529 __u16 scid; 530 531 __u16 imtu; 532 __u16 omtu; 533 __u16 flush_to; 534 __u8 mode; 535 __u8 chan_type; 536 __u8 chan_policy; 537 538 __u8 sec_level; 539 540 __u8 ident; 541 542 __u8 conf_req[64]; 543 __u8 conf_len; 544 __u8 num_conf_req; 545 __u8 num_conf_rsp; 546 547 __u8 fcs; 548 549 __u16 tx_win; 550 __u16 tx_win_max; 551 __u16 ack_win; 552 __u8 max_tx; 553 __u16 retrans_timeout; 554 __u16 monitor_timeout; 555 __u16 mps; 556 557 __u16 tx_credits; 558 __u16 rx_credits; 559 560 /* estimated available receive buffer space or -1 if unknown */ 561 ssize_t rx_avail; 562 563 __u8 tx_state; 564 __u8 rx_state; 565 566 unsigned long conf_state; 567 unsigned long conn_state; 568 unsigned long flags; 569 570 __u16 next_tx_seq; 571 __u16 expected_ack_seq; 572 __u16 expected_tx_seq; 573 __u16 buffer_seq; 574 __u16 srej_save_reqseq; 575 __u16 last_acked_seq; 576 __u16 frames_sent; 577 __u16 unacked_frames; 578 __u8 retry_count; 579 __u16 sdu_len; 580 struct sk_buff *sdu; 581 struct sk_buff *sdu_last_frag; 582 583 __u16 remote_tx_win; 584 __u8 remote_max_tx; 585 __u16 remote_mps; 586 587 __u8 local_id; 588 __u8 local_stype; 589 __u16 local_msdu; 590 __u32 local_sdu_itime; 591 __u32 local_acc_lat; 592 __u32 local_flush_to; 593 594 __u8 remote_id; 595 __u8 remote_stype; 596 __u16 remote_msdu; 597 __u32 remote_sdu_itime; 598 __u32 remote_acc_lat; 599 __u32 remote_flush_to; 600 601 struct delayed_work chan_timer; 602 struct delayed_work retrans_timer; 603 struct delayed_work monitor_timer; 604 struct delayed_work ack_timer; 605 606 struct sk_buff *tx_send_head; 607 struct sk_buff_head tx_q; 608 struct sk_buff_head srej_q; 609 struct l2cap_seq_list srej_list; 610 struct l2cap_seq_list retrans_list; 611 612 struct list_head list; 613 struct list_head global_l; 614 615 void *data; 616 const struct l2cap_ops *ops; 617 struct mutex lock; 618 }; 619 620 struct l2cap_ops { 621 char *name; 622 623 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 624 int (*recv) (struct l2cap_chan * chan, 625 struct sk_buff *skb); 626 void (*teardown) (struct l2cap_chan *chan, int err); 627 void (*close) (struct l2cap_chan *chan); 628 void (*state_change) (struct l2cap_chan *chan, 629 int state, int err); 630 void (*ready) (struct l2cap_chan *chan); 631 void (*defer) (struct l2cap_chan *chan); 632 void (*resume) (struct l2cap_chan *chan); 633 void (*suspend) (struct l2cap_chan *chan); 634 void (*set_shutdown) (struct l2cap_chan *chan); 635 long (*get_sndtimeo) (struct l2cap_chan *chan); 636 struct pid *(*get_peer_pid) (struct l2cap_chan *chan); 637 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 638 unsigned long hdr_len, 639 unsigned long len, int nb); 640 int (*filter) (struct l2cap_chan * chan, 641 struct sk_buff *skb); 642 }; 643 644 struct l2cap_conn { 645 struct hci_conn *hcon; 646 struct hci_chan *hchan; 647 648 unsigned int mtu; 649 650 __u32 feat_mask; 651 __u8 remote_fixed_chan; 652 __u8 local_fixed_chan; 653 654 __u8 info_state; 655 __u8 info_ident; 656 657 struct delayed_work info_timer; 658 659 struct sk_buff *rx_skb; 660 __u32 rx_len; 661 struct ida tx_ida; 662 __u8 tx_ident; 663 664 struct sk_buff_head pending_rx; 665 struct work_struct pending_rx_work; 666 667 struct delayed_work id_addr_timer; 668 669 __u8 disc_reason; 670 671 struct l2cap_chan *smp; 672 673 struct list_head chan_l; 674 struct mutex lock; 675 struct kref ref; 676 struct list_head users; 677 }; 678 679 struct l2cap_user { 680 struct list_head list; 681 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); 682 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); 683 }; 684 685 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 686 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 687 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 688 689 #define L2CAP_CHAN_RAW 1 690 #define L2CAP_CHAN_CONN_LESS 2 691 #define L2CAP_CHAN_CONN_ORIENTED 3 692 #define L2CAP_CHAN_FIXED 4 693 694 /* ----- L2CAP socket info ----- */ 695 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 696 697 struct l2cap_rx_busy { 698 struct list_head list; 699 struct sk_buff *skb; 700 }; 701 702 struct l2cap_pinfo { 703 struct bt_sock bt; 704 struct l2cap_chan *chan; 705 struct list_head rx_busy; 706 }; 707 708 enum { 709 CONF_REQ_SENT, 710 CONF_INPUT_DONE, 711 CONF_OUTPUT_DONE, 712 CONF_MTU_DONE, 713 CONF_MODE_DONE, 714 CONF_CONNECT_PEND, 715 CONF_RECV_NO_FCS, 716 CONF_STATE2_DEVICE, 717 CONF_EWS_RECV, 718 CONF_LOC_CONF_PEND, 719 CONF_REM_CONF_PEND, 720 CONF_NOT_COMPLETE, 721 }; 722 723 #define L2CAP_CONF_MAX_CONF_REQ 2 724 #define L2CAP_CONF_MAX_CONF_RSP 2 725 726 enum { 727 CONN_SREJ_SENT, 728 CONN_WAIT_F, 729 CONN_SREJ_ACT, 730 CONN_SEND_PBIT, 731 CONN_REMOTE_BUSY, 732 CONN_LOCAL_BUSY, 733 CONN_REJ_ACT, 734 CONN_SEND_FBIT, 735 CONN_RNR_SENT, 736 }; 737 738 /* Definitions for flags in l2cap_chan */ 739 enum { 740 FLAG_ROLE_SWITCH, 741 FLAG_FORCE_ACTIVE, 742 FLAG_FORCE_RELIABLE, 743 FLAG_FLUSHABLE, 744 FLAG_EXT_CTRL, 745 FLAG_EFS_ENABLE, 746 FLAG_DEFER_SETUP, 747 FLAG_LE_CONN_REQ_SENT, 748 FLAG_ECRED_CONN_REQ_SENT, 749 FLAG_PENDING_SECURITY, 750 FLAG_HOLD_HCI_CONN, 751 }; 752 753 /* Lock nesting levels for L2CAP channels. We need these because lockdep 754 * otherwise considers all channels equal and will e.g. complain about a 755 * connection oriented channel triggering SMP procedures or a listening 756 * channel creating and locking a child channel. 757 */ 758 enum { 759 L2CAP_NESTING_SMP, 760 L2CAP_NESTING_NORMAL, 761 L2CAP_NESTING_PARENT, 762 }; 763 764 enum { 765 L2CAP_TX_STATE_XMIT, 766 L2CAP_TX_STATE_WAIT_F, 767 }; 768 769 enum { 770 L2CAP_RX_STATE_RECV, 771 L2CAP_RX_STATE_SREJ_SENT, 772 L2CAP_RX_STATE_MOVE, 773 L2CAP_RX_STATE_WAIT_P, 774 L2CAP_RX_STATE_WAIT_F, 775 }; 776 777 enum { 778 L2CAP_TXSEQ_EXPECTED, 779 L2CAP_TXSEQ_EXPECTED_SREJ, 780 L2CAP_TXSEQ_UNEXPECTED, 781 L2CAP_TXSEQ_UNEXPECTED_SREJ, 782 L2CAP_TXSEQ_DUPLICATE, 783 L2CAP_TXSEQ_DUPLICATE_SREJ, 784 L2CAP_TXSEQ_INVALID, 785 L2CAP_TXSEQ_INVALID_IGNORE, 786 }; 787 788 enum { 789 L2CAP_EV_DATA_REQUEST, 790 L2CAP_EV_LOCAL_BUSY_DETECTED, 791 L2CAP_EV_LOCAL_BUSY_CLEAR, 792 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 793 L2CAP_EV_RECV_FBIT, 794 L2CAP_EV_RETRANS_TO, 795 L2CAP_EV_MONITOR_TO, 796 L2CAP_EV_EXPLICIT_POLL, 797 L2CAP_EV_RECV_IFRAME, 798 L2CAP_EV_RECV_RR, 799 L2CAP_EV_RECV_REJ, 800 L2CAP_EV_RECV_RNR, 801 L2CAP_EV_RECV_SREJ, 802 L2CAP_EV_RECV_FRAME, 803 }; 804 805 enum { 806 L2CAP_MOVE_ROLE_NONE, 807 L2CAP_MOVE_ROLE_INITIATOR, 808 L2CAP_MOVE_ROLE_RESPONDER, 809 }; 810 811 enum { 812 L2CAP_MOVE_STABLE, 813 L2CAP_MOVE_WAIT_REQ, 814 L2CAP_MOVE_WAIT_RSP, 815 L2CAP_MOVE_WAIT_RSP_SUCCESS, 816 L2CAP_MOVE_WAIT_CONFIRM, 817 L2CAP_MOVE_WAIT_CONFIRM_RSP, 818 L2CAP_MOVE_WAIT_LOGICAL_COMP, 819 L2CAP_MOVE_WAIT_LOGICAL_CFM, 820 L2CAP_MOVE_WAIT_LOCAL_BUSY, 821 L2CAP_MOVE_WAIT_PREPARE, 822 }; 823 824 void l2cap_chan_hold(struct l2cap_chan *c); 825 struct l2cap_chan *l2cap_chan_hold_unless_zero(struct l2cap_chan *c); 826 void l2cap_chan_put(struct l2cap_chan *c); 827 828 static inline void l2cap_chan_lock(struct l2cap_chan *chan) 829 { 830 mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting)); 831 } 832 833 static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 834 { 835 mutex_unlock(&chan->lock); 836 } 837 838 static inline void l2cap_set_timer(struct l2cap_chan *chan, 839 struct delayed_work *work, long timeout) 840 { 841 BT_DBG("chan %p state %s timeout %ld", chan, 842 state_to_string(chan->state), timeout); 843 844 /* If delayed work cancelled do not hold(chan) 845 since it is already done with previous set_timer */ 846 if (!cancel_delayed_work(work)) 847 l2cap_chan_hold(chan); 848 849 schedule_delayed_work(work, timeout); 850 } 851 852 static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 853 struct delayed_work *work) 854 { 855 bool ret; 856 857 /* put(chan) if delayed work cancelled otherwise it 858 is done in delayed work function */ 859 ret = cancel_delayed_work(work); 860 if (ret) 861 l2cap_chan_put(chan); 862 863 return ret; 864 } 865 866 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 867 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 868 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 869 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 870 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 871 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 872 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 873 874 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 875 { 876 if (seq1 >= seq2) 877 return seq1 - seq2; 878 else 879 return chan->tx_win_max + 1 - seq2 + seq1; 880 } 881 882 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 883 { 884 return (seq + 1) % (chan->tx_win_max + 1); 885 } 886 887 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 888 { 889 return NULL; 890 } 891 892 static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb) 893 { 894 return -ENOSYS; 895 } 896 897 static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan, 898 unsigned long hdr_len, 899 unsigned long len, int nb) 900 { 901 return ERR_PTR(-ENOSYS); 902 } 903 904 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 905 { 906 } 907 908 static inline void l2cap_chan_no_close(struct l2cap_chan *chan) 909 { 910 } 911 912 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 913 { 914 } 915 916 static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan, 917 int state, int err) 918 { 919 } 920 921 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) 922 { 923 } 924 925 static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan) 926 { 927 } 928 929 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) 930 { 931 } 932 933 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) 934 { 935 } 936 937 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) 938 { 939 return 0; 940 } 941 942 extern bool disable_ertm; 943 extern bool enable_ecred; 944 945 int l2cap_init_sockets(void); 946 void l2cap_cleanup_sockets(void); 947 bool l2cap_is_socket(struct socket *sock); 948 949 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan); 950 void __l2cap_ecred_conn_rsp_defer(struct l2cap_chan *chan); 951 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 952 953 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 954 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 955 956 struct l2cap_chan *l2cap_chan_create(void); 957 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 958 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 959 bdaddr_t *dst, u8 dst_type, u16 timeout); 960 int l2cap_chan_reconfigure(struct l2cap_chan *chan, __u16 mtu); 961 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len, 962 const struct sockcm_cookie *sockc); 963 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 964 void l2cap_chan_rx_avail(struct l2cap_chan *chan, ssize_t rx_avail); 965 int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator); 966 void l2cap_chan_set_defaults(struct l2cap_chan *chan); 967 int l2cap_ertm_init(struct l2cap_chan *chan); 968 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 969 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 970 typedef void (*l2cap_chan_func_t)(struct l2cap_chan *chan, void *data); 971 void l2cap_chan_list(struct l2cap_conn *conn, l2cap_chan_func_t func, 972 void *data); 973 void l2cap_chan_del(struct l2cap_chan *chan, int err); 974 void l2cap_send_conn_req(struct l2cap_chan *chan); 975 976 struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn); 977 struct l2cap_conn *l2cap_conn_hold_unless_zero(struct l2cap_conn *conn); 978 void l2cap_conn_put(struct l2cap_conn *conn); 979 980 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); 981 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); 982 983 #endif /* __L2CAP_H */ 984