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_DEFAULT_FLUSH_TO 0xFFFF 37 #define L2CAP_EFS_DEFAULT_FLUSH_TO 0xFFFFFFFF 38 #define L2CAP_DEFAULT_TX_WINDOW 63 39 #define L2CAP_DEFAULT_EXT_WINDOW 0x3FFF 40 #define L2CAP_DEFAULT_MAX_TX 3 41 #define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */ 42 #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */ 43 #define L2CAP_DEFAULT_MAX_PDU_SIZE 1492 /* Sized for AMP packet */ 44 #define L2CAP_DEFAULT_ACK_TO 200 45 #define L2CAP_DEFAULT_MAX_SDU_SIZE 0xFFFF 46 #define L2CAP_DEFAULT_SDU_ITIME 0xFFFFFFFF 47 #define L2CAP_DEFAULT_ACC_LAT 0xFFFFFFFF 48 #define L2CAP_BREDR_MAX_PAYLOAD 1019 /* 3-DH5 packet */ 49 #define L2CAP_LE_MIN_MTU 23 50 #define L2CAP_ECRED_CONN_SCID_MAX 5 51 52 #define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100) 53 #define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000) 54 #define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000) 55 #define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000) 56 #define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000) 57 #define L2CAP_MOVE_TIMEOUT msecs_to_jiffies(4000) 58 #define L2CAP_MOVE_ERTX_TIMEOUT msecs_to_jiffies(60000) 59 #define L2CAP_WAIT_ACK_POLL_PERIOD msecs_to_jiffies(200) 60 #define L2CAP_WAIT_ACK_TIMEOUT msecs_to_jiffies(10000) 61 62 /* L2CAP socket address */ 63 struct sockaddr_l2 { 64 sa_family_t l2_family; 65 __le16 l2_psm; 66 bdaddr_t l2_bdaddr; 67 __le16 l2_cid; 68 __u8 l2_bdaddr_type; 69 }; 70 71 /* L2CAP socket options */ 72 #define L2CAP_OPTIONS 0x01 73 struct l2cap_options { 74 __u16 omtu; 75 __u16 imtu; 76 __u16 flush_to; 77 __u8 mode; 78 __u8 fcs; 79 __u8 max_tx; 80 __u16 txwin_size; 81 }; 82 83 #define L2CAP_CONNINFO 0x02 84 struct l2cap_conninfo { 85 __u16 hci_handle; 86 __u8 dev_class[3]; 87 }; 88 89 #define L2CAP_LM 0x03 90 #define L2CAP_LM_MASTER 0x0001 91 #define L2CAP_LM_AUTH 0x0002 92 #define L2CAP_LM_ENCRYPT 0x0004 93 #define L2CAP_LM_TRUSTED 0x0008 94 #define L2CAP_LM_RELIABLE 0x0010 95 #define L2CAP_LM_SECURE 0x0020 96 #define L2CAP_LM_FIPS 0x0040 97 98 /* L2CAP command codes */ 99 #define L2CAP_COMMAND_REJ 0x01 100 #define L2CAP_CONN_REQ 0x02 101 #define L2CAP_CONN_RSP 0x03 102 #define L2CAP_CONF_REQ 0x04 103 #define L2CAP_CONF_RSP 0x05 104 #define L2CAP_DISCONN_REQ 0x06 105 #define L2CAP_DISCONN_RSP 0x07 106 #define L2CAP_ECHO_REQ 0x08 107 #define L2CAP_ECHO_RSP 0x09 108 #define L2CAP_INFO_REQ 0x0a 109 #define L2CAP_INFO_RSP 0x0b 110 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12 111 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13 112 #define L2CAP_LE_CONN_REQ 0x14 113 #define L2CAP_LE_CONN_RSP 0x15 114 #define L2CAP_LE_CREDITS 0x16 115 #define L2CAP_ECRED_CONN_REQ 0x17 116 #define L2CAP_ECRED_CONN_RSP 0x18 117 #define L2CAP_ECRED_RECONF_REQ 0x19 118 #define L2CAP_ECRED_RECONF_RSP 0x1a 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_SIG_BREDR 0x02 138 #define L2CAP_FC_CONNLESS 0x04 139 #define L2CAP_FC_ATT 0x10 140 #define L2CAP_FC_SIG_LE 0x20 141 #define L2CAP_FC_SMP_LE 0x40 142 #define L2CAP_FC_SMP_BREDR 0x80 143 144 /* L2CAP Control Field bit masks */ 145 #define L2CAP_CTRL_SAR 0xC000 146 #define L2CAP_CTRL_REQSEQ 0x3F00 147 #define L2CAP_CTRL_TXSEQ 0x007E 148 #define L2CAP_CTRL_SUPERVISE 0x000C 149 150 #define L2CAP_CTRL_RETRANS 0x0080 151 #define L2CAP_CTRL_FINAL 0x0080 152 #define L2CAP_CTRL_POLL 0x0010 153 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 154 155 #define L2CAP_CTRL_TXSEQ_SHIFT 1 156 #define L2CAP_CTRL_SUPER_SHIFT 2 157 #define L2CAP_CTRL_POLL_SHIFT 4 158 #define L2CAP_CTRL_FINAL_SHIFT 7 159 #define L2CAP_CTRL_REQSEQ_SHIFT 8 160 #define L2CAP_CTRL_SAR_SHIFT 14 161 162 /* L2CAP Extended Control Field bit mask */ 163 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 164 #define L2CAP_EXT_CTRL_SAR 0x00030000 165 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 166 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 167 168 #define L2CAP_EXT_CTRL_POLL 0x00040000 169 #define L2CAP_EXT_CTRL_FINAL 0x00000002 170 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 171 172 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1 173 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 174 #define L2CAP_EXT_CTRL_SAR_SHIFT 16 175 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 176 #define L2CAP_EXT_CTRL_POLL_SHIFT 18 177 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 178 179 /* L2CAP Supervisory Function */ 180 #define L2CAP_SUPER_RR 0x00 181 #define L2CAP_SUPER_REJ 0x01 182 #define L2CAP_SUPER_RNR 0x02 183 #define L2CAP_SUPER_SREJ 0x03 184 185 /* L2CAP Segmentation and Reassembly */ 186 #define L2CAP_SAR_UNSEGMENTED 0x00 187 #define L2CAP_SAR_START 0x01 188 #define L2CAP_SAR_END 0x02 189 #define L2CAP_SAR_CONTINUE 0x03 190 191 /* L2CAP Command rej. reasons */ 192 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 193 #define L2CAP_REJ_MTU_EXCEEDED 0x0001 194 #define L2CAP_REJ_INVALID_CID 0x0002 195 196 /* L2CAP structures */ 197 struct l2cap_hdr { 198 __le16 len; 199 __le16 cid; 200 } __packed; 201 #define L2CAP_LEN_SIZE 2 202 #define L2CAP_HDR_SIZE 4 203 #define L2CAP_ENH_HDR_SIZE 6 204 #define L2CAP_EXT_HDR_SIZE 8 205 206 #define L2CAP_FCS_SIZE 2 207 #define L2CAP_SDULEN_SIZE 2 208 #define L2CAP_PSMLEN_SIZE 2 209 #define L2CAP_ENH_CTRL_SIZE 2 210 #define L2CAP_EXT_CTRL_SIZE 4 211 212 struct l2cap_cmd_hdr { 213 __u8 code; 214 __u8 ident; 215 __le16 len; 216 } __packed; 217 #define L2CAP_CMD_HDR_SIZE 4 218 219 struct l2cap_cmd_rej_unk { 220 __le16 reason; 221 } __packed; 222 223 struct l2cap_cmd_rej_mtu { 224 __le16 reason; 225 __le16 max_mtu; 226 } __packed; 227 228 struct l2cap_cmd_rej_cid { 229 __le16 reason; 230 __le16 scid; 231 __le16 dcid; 232 } __packed; 233 234 struct l2cap_conn_req { 235 __le16 psm; 236 __le16 scid; 237 } __packed; 238 239 struct l2cap_conn_rsp { 240 __le16 dcid; 241 __le16 scid; 242 __le16 result; 243 __le16 status; 244 } __packed; 245 246 /* protocol/service multiplexer (PSM) */ 247 #define L2CAP_PSM_SDP 0x0001 248 #define L2CAP_PSM_RFCOMM 0x0003 249 #define L2CAP_PSM_3DSP 0x0021 250 #define L2CAP_PSM_IPSP 0x0023 /* 6LoWPAN */ 251 252 #define L2CAP_PSM_DYN_START 0x1001 253 #define L2CAP_PSM_DYN_END 0xffff 254 #define L2CAP_PSM_AUTO_END 0x10ff 255 #define L2CAP_PSM_LE_DYN_START 0x0080 256 #define L2CAP_PSM_LE_DYN_END 0x00ff 257 258 /* channel identifier */ 259 #define L2CAP_CID_SIGNALING 0x0001 260 #define L2CAP_CID_CONN_LESS 0x0002 261 #define L2CAP_CID_ATT 0x0004 262 #define L2CAP_CID_LE_SIGNALING 0x0005 263 #define L2CAP_CID_SMP 0x0006 264 #define L2CAP_CID_SMP_BREDR 0x0007 265 #define L2CAP_CID_DYN_START 0x0040 266 #define L2CAP_CID_DYN_END 0xffff 267 #define L2CAP_CID_LE_DYN_END 0x007f 268 269 /* connect/create channel results */ 270 #define L2CAP_CR_SUCCESS 0x0000 271 #define L2CAP_CR_PEND 0x0001 272 #define L2CAP_CR_BAD_PSM 0x0002 273 #define L2CAP_CR_SEC_BLOCK 0x0003 274 #define L2CAP_CR_NO_MEM 0x0004 275 #define L2CAP_CR_INVALID_SCID 0x0006 276 #define L2CAP_CR_SCID_IN_USE 0x0007 277 278 /* credit based connect results */ 279 #define L2CAP_CR_LE_SUCCESS 0x0000 280 #define L2CAP_CR_LE_BAD_PSM 0x0002 281 #define L2CAP_CR_LE_NO_MEM 0x0004 282 #define L2CAP_CR_LE_AUTHENTICATION 0x0005 283 #define L2CAP_CR_LE_AUTHORIZATION 0x0006 284 #define L2CAP_CR_LE_BAD_KEY_SIZE 0x0007 285 #define L2CAP_CR_LE_ENCRYPTION 0x0008 286 #define L2CAP_CR_LE_INVALID_SCID 0x0009 287 #define L2CAP_CR_LE_SCID_IN_USE 0x000A 288 #define L2CAP_CR_LE_UNACCEPT_PARAMS 0x000B 289 #define L2CAP_CR_LE_INVALID_PARAMS 0x000C 290 291 /* connect/create channel status */ 292 #define L2CAP_CS_NO_INFO 0x0000 293 #define L2CAP_CS_AUTHEN_PEND 0x0001 294 #define L2CAP_CS_AUTHOR_PEND 0x0002 295 296 struct l2cap_conf_req { 297 __le16 dcid; 298 __le16 flags; 299 __u8 data[]; 300 } __packed; 301 302 struct l2cap_conf_rsp { 303 __le16 scid; 304 __le16 flags; 305 __le16 result; 306 __u8 data[]; 307 } __packed; 308 309 #define L2CAP_CONF_SUCCESS 0x0000 310 #define L2CAP_CONF_UNACCEPT 0x0001 311 #define L2CAP_CONF_REJECT 0x0002 312 #define L2CAP_CONF_UNKNOWN 0x0003 313 #define L2CAP_CONF_PENDING 0x0004 314 #define L2CAP_CONF_EFS_REJECT 0x0005 315 316 /* configuration req/rsp continuation flag */ 317 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 318 319 struct l2cap_conf_opt { 320 __u8 type; 321 __u8 len; 322 __u8 val[]; 323 } __packed; 324 #define L2CAP_CONF_OPT_SIZE 2 325 326 #define L2CAP_CONF_HINT 0x80 327 #define L2CAP_CONF_MASK 0x7f 328 329 #define L2CAP_CONF_MTU 0x01 330 #define L2CAP_CONF_FLUSH_TO 0x02 331 #define L2CAP_CONF_QOS 0x03 332 #define L2CAP_CONF_RFC 0x04 333 #define L2CAP_CONF_FCS 0x05 334 #define L2CAP_CONF_EFS 0x06 335 #define L2CAP_CONF_EWS 0x07 336 337 #define L2CAP_CONF_MAX_SIZE 22 338 339 struct l2cap_conf_rfc { 340 __u8 mode; 341 __u8 txwin_size; 342 __u8 max_transmit; 343 __le16 retrans_timeout; 344 __le16 monitor_timeout; 345 __le16 max_pdu_size; 346 } __packed; 347 348 #define L2CAP_MODE_BASIC 0x00 349 #define L2CAP_MODE_RETRANS 0x01 350 #define L2CAP_MODE_FLOWCTL 0x02 351 #define L2CAP_MODE_ERTM 0x03 352 #define L2CAP_MODE_STREAMING 0x04 353 354 /* Unlike the above this one doesn't actually map to anything that would 355 * ever be sent over the air. Therefore, use a value that's unlikely to 356 * ever be used in the BR/EDR configuration phase. 357 */ 358 #define L2CAP_MODE_LE_FLOWCTL 0x80 359 #define L2CAP_MODE_EXT_FLOWCTL 0x81 360 361 struct l2cap_conf_efs { 362 __u8 id; 363 __u8 stype; 364 __le16 msdu; 365 __le32 sdu_itime; 366 __le32 acc_lat; 367 __le32 flush_to; 368 } __packed; 369 370 #define L2CAP_SERV_NOTRAFIC 0x00 371 #define L2CAP_SERV_BESTEFFORT 0x01 372 #define L2CAP_SERV_GUARANTEED 0x02 373 374 #define L2CAP_BESTEFFORT_ID 0x01 375 376 struct l2cap_disconn_req { 377 __le16 dcid; 378 __le16 scid; 379 } __packed; 380 381 struct l2cap_disconn_rsp { 382 __le16 dcid; 383 __le16 scid; 384 } __packed; 385 386 struct l2cap_info_req { 387 __le16 type; 388 } __packed; 389 390 struct l2cap_info_rsp { 391 __le16 type; 392 __le16 result; 393 __u8 data[]; 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 struct l2cap_le_conn_req { 441 __le16 psm; 442 __le16 scid; 443 __le16 mtu; 444 __le16 mps; 445 __le16 credits; 446 } __packed; 447 448 struct l2cap_le_conn_rsp { 449 __le16 dcid; 450 __le16 mtu; 451 __le16 mps; 452 __le16 credits; 453 __le16 result; 454 } __packed; 455 456 struct l2cap_le_credits { 457 __le16 cid; 458 __le16 credits; 459 } __packed; 460 461 #define L2CAP_ECRED_MIN_MTU 64 462 #define L2CAP_ECRED_MIN_MPS 64 463 #define L2CAP_ECRED_MAX_CID 5 464 465 struct l2cap_ecred_conn_req { 466 /* New members must be added within the struct_group() macro below. */ 467 __struct_group(l2cap_ecred_conn_req_hdr, hdr, __packed, 468 __le16 psm; 469 __le16 mtu; 470 __le16 mps; 471 __le16 credits; 472 ); 473 __le16 scid[]; 474 } __packed; 475 476 struct l2cap_ecred_conn_rsp { 477 /* New members must be added within the struct_group() macro below. */ 478 struct_group_tagged(l2cap_ecred_conn_rsp_hdr, hdr, 479 __le16 mtu; 480 __le16 mps; 481 __le16 credits; 482 __le16 result; 483 ); 484 __le16 dcid[]; 485 }; 486 487 struct l2cap_ecred_reconf_req { 488 __le16 mtu; 489 __le16 mps; 490 __le16 scid[]; 491 } __packed; 492 493 #define L2CAP_RECONF_SUCCESS 0x0000 494 #define L2CAP_RECONF_INVALID_MTU 0x0001 495 #define L2CAP_RECONF_INVALID_MPS 0x0002 496 #define L2CAP_RECONF_INVALID_CID 0x0003 497 #define L2CAP_RECONF_INVALID_PARAMS 0x0004 498 499 struct l2cap_ecred_reconf_rsp { 500 __le16 result; 501 } __packed; 502 503 /* ----- L2CAP channels and connections ----- */ 504 struct l2cap_seq_list { 505 __u16 head; 506 __u16 tail; 507 __u16 mask; 508 __u16 *list; 509 }; 510 511 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF 512 #define L2CAP_SEQ_LIST_TAIL 0x8000 513 514 struct l2cap_chan { 515 struct l2cap_conn *conn; 516 struct kref kref; 517 atomic_t nesting; 518 519 __u8 state; 520 521 bdaddr_t dst; 522 __u8 dst_type; 523 bdaddr_t src; 524 __u8 src_type; 525 __le16 psm; 526 __le16 sport; 527 __u16 dcid; 528 __u16 scid; 529 530 __u16 imtu; 531 __u16 omtu; 532 __u16 flush_to; 533 __u8 mode; 534 __u8 chan_type; 535 __u8 chan_policy; 536 537 __u8 sec_level; 538 539 __u8 ident; 540 541 __u8 conf_req[64]; 542 __u8 conf_len; 543 __u8 num_conf_req; 544 __u8 num_conf_rsp; 545 546 __u8 fcs; 547 548 __u16 tx_win; 549 __u16 tx_win_max; 550 __u16 ack_win; 551 __u8 max_tx; 552 __u16 retrans_timeout; 553 __u16 monitor_timeout; 554 __u16 mps; 555 556 __u16 tx_credits; 557 __u16 rx_credits; 558 559 /* estimated available receive buffer space or -1 if unknown */ 560 ssize_t rx_avail; 561 562 __u8 tx_state; 563 __u8 rx_state; 564 565 unsigned long conf_state; 566 unsigned long conn_state; 567 unsigned long flags; 568 569 __u16 next_tx_seq; 570 __u16 expected_ack_seq; 571 __u16 expected_tx_seq; 572 __u16 buffer_seq; 573 __u16 srej_save_reqseq; 574 __u16 last_acked_seq; 575 __u16 frames_sent; 576 __u16 unacked_frames; 577 __u8 retry_count; 578 __u16 sdu_len; 579 struct sk_buff *sdu; 580 struct sk_buff *sdu_last_frag; 581 582 __u16 remote_tx_win; 583 __u8 remote_max_tx; 584 __u16 remote_mps; 585 586 __u8 local_id; 587 __u8 local_stype; 588 __u16 local_msdu; 589 __u32 local_sdu_itime; 590 __u32 local_acc_lat; 591 __u32 local_flush_to; 592 593 __u8 remote_id; 594 __u8 remote_stype; 595 __u16 remote_msdu; 596 __u32 remote_sdu_itime; 597 __u32 remote_acc_lat; 598 __u32 remote_flush_to; 599 600 struct delayed_work chan_timer; 601 struct delayed_work retrans_timer; 602 struct delayed_work monitor_timer; 603 struct delayed_work ack_timer; 604 605 struct sk_buff *tx_send_head; 606 struct sk_buff_head tx_q; 607 struct sk_buff_head srej_q; 608 struct l2cap_seq_list srej_list; 609 struct l2cap_seq_list retrans_list; 610 611 struct list_head list; 612 struct list_head global_l; 613 614 void *data; 615 const struct l2cap_ops *ops; 616 struct mutex lock; 617 }; 618 619 struct l2cap_ops { 620 char *name; 621 622 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 623 int (*recv) (struct l2cap_chan * chan, 624 struct sk_buff *skb); 625 void (*teardown) (struct l2cap_chan *chan, int err); 626 void (*close) (struct l2cap_chan *chan); 627 void (*state_change) (struct l2cap_chan *chan, 628 int state, int err); 629 void (*ready) (struct l2cap_chan *chan); 630 void (*defer) (struct l2cap_chan *chan); 631 void (*resume) (struct l2cap_chan *chan); 632 void (*suspend) (struct l2cap_chan *chan); 633 void (*set_shutdown) (struct l2cap_chan *chan); 634 long (*get_sndtimeo) (struct l2cap_chan *chan); 635 struct pid *(*get_peer_pid) (struct l2cap_chan *chan); 636 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 637 unsigned long hdr_len, 638 unsigned long len, int nb); 639 int (*filter) (struct l2cap_chan * chan, 640 struct sk_buff *skb); 641 }; 642 643 struct l2cap_conn { 644 struct hci_conn *hcon; 645 struct hci_chan *hchan; 646 647 unsigned int mtu; 648 649 __u32 feat_mask; 650 __u8 remote_fixed_chan; 651 __u8 local_fixed_chan; 652 653 __u8 info_state; 654 __u8 info_ident; 655 656 struct delayed_work info_timer; 657 658 struct sk_buff *rx_skb; 659 __u32 rx_len; 660 struct ida tx_ida; 661 __u8 tx_ident; 662 663 struct sk_buff_head pending_rx; 664 struct work_struct pending_rx_work; 665 666 struct delayed_work id_addr_timer; 667 668 __u8 disc_reason; 669 670 struct l2cap_chan *smp; 671 672 struct list_head chan_l; 673 struct mutex lock; 674 struct kref ref; 675 struct list_head users; 676 }; 677 678 struct l2cap_user { 679 struct list_head list; 680 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); 681 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); 682 }; 683 684 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 685 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 686 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 687 688 #define L2CAP_CHAN_RAW 1 689 #define L2CAP_CHAN_CONN_LESS 2 690 #define L2CAP_CHAN_CONN_ORIENTED 3 691 #define L2CAP_CHAN_FIXED 4 692 693 /* ----- L2CAP socket info ----- */ 694 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 695 696 struct l2cap_rx_busy { 697 struct list_head list; 698 struct sk_buff *skb; 699 }; 700 701 struct l2cap_pinfo { 702 struct bt_sock bt; 703 struct l2cap_chan *chan; 704 struct list_head rx_busy; 705 }; 706 707 enum { 708 CONF_REQ_SENT, 709 CONF_INPUT_DONE, 710 CONF_OUTPUT_DONE, 711 CONF_MTU_DONE, 712 CONF_MODE_DONE, 713 CONF_CONNECT_PEND, 714 CONF_RECV_NO_FCS, 715 CONF_STATE2_DEVICE, 716 CONF_EWS_RECV, 717 CONF_LOC_CONF_PEND, 718 CONF_REM_CONF_PEND, 719 CONF_NOT_COMPLETE, 720 }; 721 722 #define L2CAP_CONF_MAX_CONF_REQ 2 723 #define L2CAP_CONF_MAX_CONF_RSP 2 724 725 enum { 726 CONN_SREJ_SENT, 727 CONN_WAIT_F, 728 CONN_SREJ_ACT, 729 CONN_SEND_PBIT, 730 CONN_REMOTE_BUSY, 731 CONN_LOCAL_BUSY, 732 CONN_REJ_ACT, 733 CONN_SEND_FBIT, 734 CONN_RNR_SENT, 735 }; 736 737 /* Definitions for flags in l2cap_chan */ 738 enum { 739 FLAG_ROLE_SWITCH, 740 FLAG_FORCE_ACTIVE, 741 FLAG_FORCE_RELIABLE, 742 FLAG_FLUSHABLE, 743 FLAG_EXT_CTRL, 744 FLAG_EFS_ENABLE, 745 FLAG_DEFER_SETUP, 746 FLAG_LE_CONN_REQ_SENT, 747 FLAG_ECRED_CONN_REQ_SENT, 748 FLAG_PENDING_SECURITY, 749 FLAG_HOLD_HCI_CONN, 750 }; 751 752 /* Lock nesting levels for L2CAP channels. We need these because lockdep 753 * otherwise considers all channels equal and will e.g. complain about a 754 * connection oriented channel triggering SMP procedures or a listening 755 * channel creating and locking a child channel. 756 */ 757 enum { 758 L2CAP_NESTING_SMP, 759 L2CAP_NESTING_NORMAL, 760 L2CAP_NESTING_PARENT, 761 }; 762 763 enum { 764 L2CAP_TX_STATE_XMIT, 765 L2CAP_TX_STATE_WAIT_F, 766 }; 767 768 enum { 769 L2CAP_RX_STATE_RECV, 770 L2CAP_RX_STATE_SREJ_SENT, 771 L2CAP_RX_STATE_MOVE, 772 L2CAP_RX_STATE_WAIT_P, 773 L2CAP_RX_STATE_WAIT_F, 774 }; 775 776 enum { 777 L2CAP_TXSEQ_EXPECTED, 778 L2CAP_TXSEQ_EXPECTED_SREJ, 779 L2CAP_TXSEQ_UNEXPECTED, 780 L2CAP_TXSEQ_UNEXPECTED_SREJ, 781 L2CAP_TXSEQ_DUPLICATE, 782 L2CAP_TXSEQ_DUPLICATE_SREJ, 783 L2CAP_TXSEQ_INVALID, 784 L2CAP_TXSEQ_INVALID_IGNORE, 785 }; 786 787 enum { 788 L2CAP_EV_DATA_REQUEST, 789 L2CAP_EV_LOCAL_BUSY_DETECTED, 790 L2CAP_EV_LOCAL_BUSY_CLEAR, 791 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 792 L2CAP_EV_RECV_FBIT, 793 L2CAP_EV_RETRANS_TO, 794 L2CAP_EV_MONITOR_TO, 795 L2CAP_EV_EXPLICIT_POLL, 796 L2CAP_EV_RECV_IFRAME, 797 L2CAP_EV_RECV_RR, 798 L2CAP_EV_RECV_REJ, 799 L2CAP_EV_RECV_RNR, 800 L2CAP_EV_RECV_SREJ, 801 L2CAP_EV_RECV_FRAME, 802 }; 803 804 enum { 805 L2CAP_MOVE_ROLE_NONE, 806 L2CAP_MOVE_ROLE_INITIATOR, 807 L2CAP_MOVE_ROLE_RESPONDER, 808 }; 809 810 enum { 811 L2CAP_MOVE_STABLE, 812 L2CAP_MOVE_WAIT_REQ, 813 L2CAP_MOVE_WAIT_RSP, 814 L2CAP_MOVE_WAIT_RSP_SUCCESS, 815 L2CAP_MOVE_WAIT_CONFIRM, 816 L2CAP_MOVE_WAIT_CONFIRM_RSP, 817 L2CAP_MOVE_WAIT_LOGICAL_COMP, 818 L2CAP_MOVE_WAIT_LOGICAL_CFM, 819 L2CAP_MOVE_WAIT_LOCAL_BUSY, 820 L2CAP_MOVE_WAIT_PREPARE, 821 }; 822 823 void l2cap_chan_hold(struct l2cap_chan *c); 824 struct l2cap_chan *l2cap_chan_hold_unless_zero(struct l2cap_chan *c); 825 void l2cap_chan_put(struct l2cap_chan *c); 826 827 static inline void l2cap_chan_lock(struct l2cap_chan *chan) 828 { 829 mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting)); 830 } 831 832 static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 833 { 834 mutex_unlock(&chan->lock); 835 } 836 837 static inline void l2cap_set_timer(struct l2cap_chan *chan, 838 struct delayed_work *work, long timeout) 839 { 840 BT_DBG("chan %p state %s timeout %ld", chan, 841 state_to_string(chan->state), timeout); 842 843 /* If delayed work cancelled do not hold(chan) 844 since it is already done with previous set_timer */ 845 if (!cancel_delayed_work(work)) 846 l2cap_chan_hold(chan); 847 848 schedule_delayed_work(work, timeout); 849 } 850 851 static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 852 struct delayed_work *work) 853 { 854 bool ret; 855 856 /* put(chan) if delayed work cancelled otherwise it 857 is done in delayed work function */ 858 ret = cancel_delayed_work(work); 859 if (ret) 860 l2cap_chan_put(chan); 861 862 return ret; 863 } 864 865 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 866 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 867 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 868 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 869 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 870 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 871 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 872 873 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 874 { 875 if (seq1 >= seq2) 876 return seq1 - seq2; 877 else 878 return chan->tx_win_max + 1 - seq2 + seq1; 879 } 880 881 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 882 { 883 return (seq + 1) % (chan->tx_win_max + 1); 884 } 885 886 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 887 { 888 return NULL; 889 } 890 891 static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb) 892 { 893 return -ENOSYS; 894 } 895 896 static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan, 897 unsigned long hdr_len, 898 unsigned long len, int nb) 899 { 900 return ERR_PTR(-ENOSYS); 901 } 902 903 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 904 { 905 } 906 907 static inline void l2cap_chan_no_close(struct l2cap_chan *chan) 908 { 909 } 910 911 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 912 { 913 } 914 915 static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan, 916 int state, int err) 917 { 918 } 919 920 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) 921 { 922 } 923 924 static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan) 925 { 926 } 927 928 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) 929 { 930 } 931 932 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) 933 { 934 } 935 936 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) 937 { 938 return 0; 939 } 940 941 extern bool disable_ertm; 942 extern bool enable_ecred; 943 944 int l2cap_init_sockets(void); 945 void l2cap_cleanup_sockets(void); 946 bool l2cap_is_socket(struct socket *sock); 947 948 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan); 949 void __l2cap_ecred_conn_rsp_defer(struct l2cap_chan *chan); 950 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 951 952 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 953 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 954 955 struct l2cap_chan *l2cap_chan_create(void); 956 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 957 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 958 bdaddr_t *dst, u8 dst_type, u16 timeout); 959 int l2cap_chan_reconfigure(struct l2cap_chan *chan, __u16 mtu); 960 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len, 961 const struct sockcm_cookie *sockc); 962 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 963 void l2cap_chan_rx_avail(struct l2cap_chan *chan, ssize_t rx_avail); 964 int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator); 965 void l2cap_chan_set_defaults(struct l2cap_chan *chan); 966 int l2cap_ertm_init(struct l2cap_chan *chan); 967 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 968 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 969 typedef void (*l2cap_chan_func_t)(struct l2cap_chan *chan, void *data); 970 void l2cap_chan_list(struct l2cap_conn *conn, l2cap_chan_func_t func, 971 void *data); 972 void l2cap_chan_del(struct l2cap_chan *chan, int err); 973 void l2cap_send_conn_req(struct l2cap_chan *chan); 974 975 struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn); 976 struct l2cap_conn *l2cap_conn_hold_unless_zero(struct l2cap_conn *conn); 977 void l2cap_conn_put(struct l2cap_conn *conn); 978 979 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); 980 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); 981 982 #endif /* __L2CAP_H */ 983