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 #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 51 #define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100) 52 #define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000) 53 #define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000) 54 #define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000) 55 #define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000) 56 #define L2CAP_MOVE_TIMEOUT msecs_to_jiffies(4000) 57 #define L2CAP_MOVE_ERTX_TIMEOUT msecs_to_jiffies(60000) 58 #define L2CAP_WAIT_ACK_POLL_PERIOD msecs_to_jiffies(200) 59 #define L2CAP_WAIT_ACK_TIMEOUT msecs_to_jiffies(10000) 60 61 #define L2CAP_A2MP_DEFAULT_MTU 670 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_CREATE_CHAN_REQ 0x0c 112 #define L2CAP_CREATE_CHAN_RSP 0x0d 113 #define L2CAP_MOVE_CHAN_REQ 0x0e 114 #define L2CAP_MOVE_CHAN_RSP 0x0f 115 #define L2CAP_MOVE_CHAN_CFM 0x10 116 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11 117 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12 118 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13 119 #define L2CAP_LE_CONN_REQ 0x14 120 #define L2CAP_LE_CONN_RSP 0x15 121 #define L2CAP_LE_CREDITS 0x16 122 #define L2CAP_ECRED_CONN_REQ 0x17 123 #define L2CAP_ECRED_CONN_RSP 0x18 124 #define L2CAP_ECRED_RECONF_REQ 0x19 125 #define L2CAP_ECRED_RECONF_RSP 0x1a 126 127 /* L2CAP extended feature mask */ 128 #define L2CAP_FEAT_FLOWCTL 0x00000001 129 #define L2CAP_FEAT_RETRANS 0x00000002 130 #define L2CAP_FEAT_BIDIR_QOS 0x00000004 131 #define L2CAP_FEAT_ERTM 0x00000008 132 #define L2CAP_FEAT_STREAMING 0x00000010 133 #define L2CAP_FEAT_FCS 0x00000020 134 #define L2CAP_FEAT_EXT_FLOW 0x00000040 135 #define L2CAP_FEAT_FIXED_CHAN 0x00000080 136 #define L2CAP_FEAT_EXT_WINDOW 0x00000100 137 #define L2CAP_FEAT_UCD 0x00000200 138 139 /* L2CAP checksum option */ 140 #define L2CAP_FCS_NONE 0x00 141 #define L2CAP_FCS_CRC16 0x01 142 143 /* L2CAP fixed channels */ 144 #define L2CAP_FC_SIG_BREDR 0x02 145 #define L2CAP_FC_CONNLESS 0x04 146 #define L2CAP_FC_A2MP 0x08 147 #define L2CAP_FC_ATT 0x10 148 #define L2CAP_FC_SIG_LE 0x20 149 #define L2CAP_FC_SMP_LE 0x40 150 #define L2CAP_FC_SMP_BREDR 0x80 151 152 /* L2CAP Control Field bit masks */ 153 #define L2CAP_CTRL_SAR 0xC000 154 #define L2CAP_CTRL_REQSEQ 0x3F00 155 #define L2CAP_CTRL_TXSEQ 0x007E 156 #define L2CAP_CTRL_SUPERVISE 0x000C 157 158 #define L2CAP_CTRL_RETRANS 0x0080 159 #define L2CAP_CTRL_FINAL 0x0080 160 #define L2CAP_CTRL_POLL 0x0010 161 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 162 163 #define L2CAP_CTRL_TXSEQ_SHIFT 1 164 #define L2CAP_CTRL_SUPER_SHIFT 2 165 #define L2CAP_CTRL_POLL_SHIFT 4 166 #define L2CAP_CTRL_FINAL_SHIFT 7 167 #define L2CAP_CTRL_REQSEQ_SHIFT 8 168 #define L2CAP_CTRL_SAR_SHIFT 14 169 170 /* L2CAP Extended Control Field bit mask */ 171 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 172 #define L2CAP_EXT_CTRL_SAR 0x00030000 173 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 174 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 175 176 #define L2CAP_EXT_CTRL_POLL 0x00040000 177 #define L2CAP_EXT_CTRL_FINAL 0x00000002 178 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 179 180 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1 181 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 182 #define L2CAP_EXT_CTRL_SAR_SHIFT 16 183 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 184 #define L2CAP_EXT_CTRL_POLL_SHIFT 18 185 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 186 187 /* L2CAP Supervisory Function */ 188 #define L2CAP_SUPER_RR 0x00 189 #define L2CAP_SUPER_REJ 0x01 190 #define L2CAP_SUPER_RNR 0x02 191 #define L2CAP_SUPER_SREJ 0x03 192 193 /* L2CAP Segmentation and Reassembly */ 194 #define L2CAP_SAR_UNSEGMENTED 0x00 195 #define L2CAP_SAR_START 0x01 196 #define L2CAP_SAR_END 0x02 197 #define L2CAP_SAR_CONTINUE 0x03 198 199 /* L2CAP Command rej. reasons */ 200 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 201 #define L2CAP_REJ_MTU_EXCEEDED 0x0001 202 #define L2CAP_REJ_INVALID_CID 0x0002 203 204 /* L2CAP structures */ 205 struct l2cap_hdr { 206 __le16 len; 207 __le16 cid; 208 } __packed; 209 #define L2CAP_HDR_SIZE 4 210 #define L2CAP_ENH_HDR_SIZE 6 211 #define L2CAP_EXT_HDR_SIZE 8 212 213 #define L2CAP_FCS_SIZE 2 214 #define L2CAP_SDULEN_SIZE 2 215 #define L2CAP_PSMLEN_SIZE 2 216 #define L2CAP_ENH_CTRL_SIZE 2 217 #define L2CAP_EXT_CTRL_SIZE 4 218 219 struct l2cap_cmd_hdr { 220 __u8 code; 221 __u8 ident; 222 __le16 len; 223 } __packed; 224 #define L2CAP_CMD_HDR_SIZE 4 225 226 struct l2cap_cmd_rej_unk { 227 __le16 reason; 228 } __packed; 229 230 struct l2cap_cmd_rej_mtu { 231 __le16 reason; 232 __le16 max_mtu; 233 } __packed; 234 235 struct l2cap_cmd_rej_cid { 236 __le16 reason; 237 __le16 scid; 238 __le16 dcid; 239 } __packed; 240 241 struct l2cap_conn_req { 242 __le16 psm; 243 __le16 scid; 244 } __packed; 245 246 struct l2cap_conn_rsp { 247 __le16 dcid; 248 __le16 scid; 249 __le16 result; 250 __le16 status; 251 } __packed; 252 253 /* protocol/service multiplexer (PSM) */ 254 #define L2CAP_PSM_SDP 0x0001 255 #define L2CAP_PSM_RFCOMM 0x0003 256 #define L2CAP_PSM_3DSP 0x0021 257 #define L2CAP_PSM_IPSP 0x0023 /* 6LoWPAN */ 258 259 #define L2CAP_PSM_DYN_START 0x1001 260 #define L2CAP_PSM_DYN_END 0xffff 261 #define L2CAP_PSM_AUTO_END 0x10ff 262 #define L2CAP_PSM_LE_DYN_START 0x0080 263 #define L2CAP_PSM_LE_DYN_END 0x00ff 264 265 /* channel identifier */ 266 #define L2CAP_CID_SIGNALING 0x0001 267 #define L2CAP_CID_CONN_LESS 0x0002 268 #define L2CAP_CID_A2MP 0x0003 269 #define L2CAP_CID_ATT 0x0004 270 #define L2CAP_CID_LE_SIGNALING 0x0005 271 #define L2CAP_CID_SMP 0x0006 272 #define L2CAP_CID_SMP_BREDR 0x0007 273 #define L2CAP_CID_DYN_START 0x0040 274 #define L2CAP_CID_DYN_END 0xffff 275 #define L2CAP_CID_LE_DYN_END 0x007f 276 277 /* connect/create channel results */ 278 #define L2CAP_CR_SUCCESS 0x0000 279 #define L2CAP_CR_PEND 0x0001 280 #define L2CAP_CR_BAD_PSM 0x0002 281 #define L2CAP_CR_SEC_BLOCK 0x0003 282 #define L2CAP_CR_NO_MEM 0x0004 283 #define L2CAP_CR_BAD_AMP 0x0005 284 #define L2CAP_CR_INVALID_SCID 0x0006 285 #define L2CAP_CR_SCID_IN_USE 0x0007 286 287 /* credit based connect results */ 288 #define L2CAP_CR_LE_SUCCESS 0x0000 289 #define L2CAP_CR_LE_BAD_PSM 0x0002 290 #define L2CAP_CR_LE_NO_MEM 0x0004 291 #define L2CAP_CR_LE_AUTHENTICATION 0x0005 292 #define L2CAP_CR_LE_AUTHORIZATION 0x0006 293 #define L2CAP_CR_LE_BAD_KEY_SIZE 0x0007 294 #define L2CAP_CR_LE_ENCRYPTION 0x0008 295 #define L2CAP_CR_LE_INVALID_SCID 0x0009 296 #define L2CAP_CR_LE_SCID_IN_USE 0X000A 297 #define L2CAP_CR_LE_UNACCEPT_PARAMS 0X000B 298 #define L2CAP_CR_LE_INVALID_PARAMS 0X000C 299 300 /* connect/create channel status */ 301 #define L2CAP_CS_NO_INFO 0x0000 302 #define L2CAP_CS_AUTHEN_PEND 0x0001 303 #define L2CAP_CS_AUTHOR_PEND 0x0002 304 305 struct l2cap_conf_req { 306 __le16 dcid; 307 __le16 flags; 308 __u8 data[]; 309 } __packed; 310 311 struct l2cap_conf_rsp { 312 __le16 scid; 313 __le16 flags; 314 __le16 result; 315 __u8 data[]; 316 } __packed; 317 318 #define L2CAP_CONF_SUCCESS 0x0000 319 #define L2CAP_CONF_UNACCEPT 0x0001 320 #define L2CAP_CONF_REJECT 0x0002 321 #define L2CAP_CONF_UNKNOWN 0x0003 322 #define L2CAP_CONF_PENDING 0x0004 323 #define L2CAP_CONF_EFS_REJECT 0x0005 324 325 /* configuration req/rsp continuation flag */ 326 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 327 328 struct l2cap_conf_opt { 329 __u8 type; 330 __u8 len; 331 __u8 val[]; 332 } __packed; 333 #define L2CAP_CONF_OPT_SIZE 2 334 335 #define L2CAP_CONF_HINT 0x80 336 #define L2CAP_CONF_MASK 0x7f 337 338 #define L2CAP_CONF_MTU 0x01 339 #define L2CAP_CONF_FLUSH_TO 0x02 340 #define L2CAP_CONF_QOS 0x03 341 #define L2CAP_CONF_RFC 0x04 342 #define L2CAP_CONF_FCS 0x05 343 #define L2CAP_CONF_EFS 0x06 344 #define L2CAP_CONF_EWS 0x07 345 346 #define L2CAP_CONF_MAX_SIZE 22 347 348 struct l2cap_conf_rfc { 349 __u8 mode; 350 __u8 txwin_size; 351 __u8 max_transmit; 352 __le16 retrans_timeout; 353 __le16 monitor_timeout; 354 __le16 max_pdu_size; 355 } __packed; 356 357 #define L2CAP_MODE_BASIC 0x00 358 #define L2CAP_MODE_RETRANS 0x01 359 #define L2CAP_MODE_FLOWCTL 0x02 360 #define L2CAP_MODE_ERTM 0x03 361 #define L2CAP_MODE_STREAMING 0x04 362 363 /* Unlike the above this one doesn't actually map to anything that would 364 * ever be sent over the air. Therefore, use a value that's unlikely to 365 * ever be used in the BR/EDR configuration phase. 366 */ 367 #define L2CAP_MODE_LE_FLOWCTL 0x80 368 #define L2CAP_MODE_EXT_FLOWCTL 0x81 369 370 struct l2cap_conf_efs { 371 __u8 id; 372 __u8 stype; 373 __le16 msdu; 374 __le32 sdu_itime; 375 __le32 acc_lat; 376 __le32 flush_to; 377 } __packed; 378 379 #define L2CAP_SERV_NOTRAFIC 0x00 380 #define L2CAP_SERV_BESTEFFORT 0x01 381 #define L2CAP_SERV_GUARANTEED 0x02 382 383 #define L2CAP_BESTEFFORT_ID 0x01 384 385 struct l2cap_disconn_req { 386 __le16 dcid; 387 __le16 scid; 388 } __packed; 389 390 struct l2cap_disconn_rsp { 391 __le16 dcid; 392 __le16 scid; 393 } __packed; 394 395 struct l2cap_info_req { 396 __le16 type; 397 } __packed; 398 399 struct l2cap_info_rsp { 400 __le16 type; 401 __le16 result; 402 __u8 data[]; 403 } __packed; 404 405 struct l2cap_create_chan_req { 406 __le16 psm; 407 __le16 scid; 408 __u8 amp_id; 409 } __packed; 410 411 struct l2cap_create_chan_rsp { 412 __le16 dcid; 413 __le16 scid; 414 __le16 result; 415 __le16 status; 416 } __packed; 417 418 struct l2cap_move_chan_req { 419 __le16 icid; 420 __u8 dest_amp_id; 421 } __packed; 422 423 struct l2cap_move_chan_rsp { 424 __le16 icid; 425 __le16 result; 426 } __packed; 427 428 #define L2CAP_MR_SUCCESS 0x0000 429 #define L2CAP_MR_PEND 0x0001 430 #define L2CAP_MR_BAD_ID 0x0002 431 #define L2CAP_MR_SAME_ID 0x0003 432 #define L2CAP_MR_NOT_SUPP 0x0004 433 #define L2CAP_MR_COLLISION 0x0005 434 #define L2CAP_MR_NOT_ALLOWED 0x0006 435 436 struct l2cap_move_chan_cfm { 437 __le16 icid; 438 __le16 result; 439 } __packed; 440 441 #define L2CAP_MC_CONFIRMED 0x0000 442 #define L2CAP_MC_UNCONFIRMED 0x0001 443 444 struct l2cap_move_chan_cfm_rsp { 445 __le16 icid; 446 } __packed; 447 448 /* info type */ 449 #define L2CAP_IT_CL_MTU 0x0001 450 #define L2CAP_IT_FEAT_MASK 0x0002 451 #define L2CAP_IT_FIXED_CHAN 0x0003 452 453 /* info result */ 454 #define L2CAP_IR_SUCCESS 0x0000 455 #define L2CAP_IR_NOTSUPP 0x0001 456 457 struct l2cap_conn_param_update_req { 458 __le16 min; 459 __le16 max; 460 __le16 latency; 461 __le16 to_multiplier; 462 } __packed; 463 464 struct l2cap_conn_param_update_rsp { 465 __le16 result; 466 } __packed; 467 468 /* Connection Parameters result */ 469 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 470 #define L2CAP_CONN_PARAM_REJECTED 0x0001 471 472 struct l2cap_le_conn_req { 473 __le16 psm; 474 __le16 scid; 475 __le16 mtu; 476 __le16 mps; 477 __le16 credits; 478 } __packed; 479 480 struct l2cap_le_conn_rsp { 481 __le16 dcid; 482 __le16 mtu; 483 __le16 mps; 484 __le16 credits; 485 __le16 result; 486 } __packed; 487 488 struct l2cap_le_credits { 489 __le16 cid; 490 __le16 credits; 491 } __packed; 492 493 #define L2CAP_ECRED_MIN_MTU 64 494 #define L2CAP_ECRED_MIN_MPS 64 495 496 struct l2cap_ecred_conn_req { 497 __le16 psm; 498 __le16 mtu; 499 __le16 mps; 500 __le16 credits; 501 __le16 scid[0]; 502 } __packed; 503 504 struct l2cap_ecred_conn_rsp { 505 __le16 mtu; 506 __le16 mps; 507 __le16 credits; 508 __le16 result; 509 __le16 dcid[0]; 510 }; 511 512 struct l2cap_ecred_reconf_req { 513 __le16 mtu; 514 __le16 mps; 515 __le16 scid[0]; 516 } __packed; 517 518 #define L2CAP_RECONF_SUCCESS 0x0000 519 #define L2CAP_RECONF_INVALID_MTU 0x0001 520 #define L2CAP_RECONF_INVALID_MPS 0x0002 521 522 struct l2cap_ecred_reconf_rsp { 523 __le16 result; 524 } __packed; 525 526 /* ----- L2CAP channels and connections ----- */ 527 struct l2cap_seq_list { 528 __u16 head; 529 __u16 tail; 530 __u16 mask; 531 __u16 *list; 532 }; 533 534 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF 535 #define L2CAP_SEQ_LIST_TAIL 0x8000 536 537 struct l2cap_chan { 538 struct l2cap_conn *conn; 539 struct hci_conn *hs_hcon; 540 struct hci_chan *hs_hchan; 541 struct kref kref; 542 atomic_t nesting; 543 544 __u8 state; 545 546 bdaddr_t dst; 547 __u8 dst_type; 548 bdaddr_t src; 549 __u8 src_type; 550 __le16 psm; 551 __le16 sport; 552 __u16 dcid; 553 __u16 scid; 554 555 __u16 imtu; 556 __u16 omtu; 557 __u16 flush_to; 558 __u8 mode; 559 __u8 chan_type; 560 __u8 chan_policy; 561 562 __u8 sec_level; 563 564 __u8 ident; 565 566 __u8 conf_req[64]; 567 __u8 conf_len; 568 __u8 num_conf_req; 569 __u8 num_conf_rsp; 570 571 __u8 fcs; 572 573 __u16 tx_win; 574 __u16 tx_win_max; 575 __u16 ack_win; 576 __u8 max_tx; 577 __u16 retrans_timeout; 578 __u16 monitor_timeout; 579 __u16 mps; 580 581 __u16 tx_credits; 582 __u16 rx_credits; 583 584 __u8 tx_state; 585 __u8 rx_state; 586 587 unsigned long conf_state; 588 unsigned long conn_state; 589 unsigned long flags; 590 591 __u8 remote_amp_id; 592 __u8 local_amp_id; 593 __u8 move_id; 594 __u8 move_state; 595 __u8 move_role; 596 597 __u16 next_tx_seq; 598 __u16 expected_ack_seq; 599 __u16 expected_tx_seq; 600 __u16 buffer_seq; 601 __u16 srej_save_reqseq; 602 __u16 last_acked_seq; 603 __u16 frames_sent; 604 __u16 unacked_frames; 605 __u8 retry_count; 606 __u16 sdu_len; 607 struct sk_buff *sdu; 608 struct sk_buff *sdu_last_frag; 609 610 __u16 remote_tx_win; 611 __u8 remote_max_tx; 612 __u16 remote_mps; 613 614 __u8 local_id; 615 __u8 local_stype; 616 __u16 local_msdu; 617 __u32 local_sdu_itime; 618 __u32 local_acc_lat; 619 __u32 local_flush_to; 620 621 __u8 remote_id; 622 __u8 remote_stype; 623 __u16 remote_msdu; 624 __u32 remote_sdu_itime; 625 __u32 remote_acc_lat; 626 __u32 remote_flush_to; 627 628 struct delayed_work chan_timer; 629 struct delayed_work retrans_timer; 630 struct delayed_work monitor_timer; 631 struct delayed_work ack_timer; 632 633 struct sk_buff *tx_send_head; 634 struct sk_buff_head tx_q; 635 struct sk_buff_head srej_q; 636 struct l2cap_seq_list srej_list; 637 struct l2cap_seq_list retrans_list; 638 639 struct list_head list; 640 struct list_head global_l; 641 642 void *data; 643 const struct l2cap_ops *ops; 644 struct mutex lock; 645 }; 646 647 struct l2cap_ops { 648 char *name; 649 650 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 651 int (*recv) (struct l2cap_chan * chan, 652 struct sk_buff *skb); 653 void (*teardown) (struct l2cap_chan *chan, int err); 654 void (*close) (struct l2cap_chan *chan); 655 void (*state_change) (struct l2cap_chan *chan, 656 int state, int err); 657 void (*ready) (struct l2cap_chan *chan); 658 void (*defer) (struct l2cap_chan *chan); 659 void (*resume) (struct l2cap_chan *chan); 660 void (*suspend) (struct l2cap_chan *chan); 661 void (*set_shutdown) (struct l2cap_chan *chan); 662 long (*get_sndtimeo) (struct l2cap_chan *chan); 663 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 664 unsigned long hdr_len, 665 unsigned long len, int nb); 666 }; 667 668 struct l2cap_conn { 669 struct hci_conn *hcon; 670 struct hci_chan *hchan; 671 672 unsigned int mtu; 673 674 __u32 feat_mask; 675 __u8 remote_fixed_chan; 676 __u8 local_fixed_chan; 677 678 __u8 info_state; 679 __u8 info_ident; 680 681 struct delayed_work info_timer; 682 683 struct sk_buff *rx_skb; 684 __u32 rx_len; 685 __u8 tx_ident; 686 struct mutex ident_lock; 687 688 struct sk_buff_head pending_rx; 689 struct work_struct pending_rx_work; 690 691 struct work_struct id_addr_update_work; 692 693 __u8 disc_reason; 694 695 struct l2cap_chan *smp; 696 697 struct list_head chan_l; 698 struct mutex chan_lock; 699 struct kref ref; 700 struct list_head users; 701 }; 702 703 struct l2cap_user { 704 struct list_head list; 705 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); 706 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); 707 }; 708 709 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 710 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 711 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 712 713 #define L2CAP_CHAN_RAW 1 714 #define L2CAP_CHAN_CONN_LESS 2 715 #define L2CAP_CHAN_CONN_ORIENTED 3 716 #define L2CAP_CHAN_FIXED 4 717 718 /* ----- L2CAP socket info ----- */ 719 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 720 721 struct l2cap_pinfo { 722 struct bt_sock bt; 723 struct l2cap_chan *chan; 724 struct sk_buff *rx_busy_skb; 725 }; 726 727 enum { 728 CONF_REQ_SENT, 729 CONF_INPUT_DONE, 730 CONF_OUTPUT_DONE, 731 CONF_MTU_DONE, 732 CONF_MODE_DONE, 733 CONF_CONNECT_PEND, 734 CONF_RECV_NO_FCS, 735 CONF_STATE2_DEVICE, 736 CONF_EWS_RECV, 737 CONF_LOC_CONF_PEND, 738 CONF_REM_CONF_PEND, 739 CONF_NOT_COMPLETE, 740 }; 741 742 #define L2CAP_CONF_MAX_CONF_REQ 2 743 #define L2CAP_CONF_MAX_CONF_RSP 2 744 745 enum { 746 CONN_SREJ_SENT, 747 CONN_WAIT_F, 748 CONN_SREJ_ACT, 749 CONN_SEND_PBIT, 750 CONN_REMOTE_BUSY, 751 CONN_LOCAL_BUSY, 752 CONN_REJ_ACT, 753 CONN_SEND_FBIT, 754 CONN_RNR_SENT, 755 }; 756 757 /* Definitions for flags in l2cap_chan */ 758 enum { 759 FLAG_ROLE_SWITCH, 760 FLAG_FORCE_ACTIVE, 761 FLAG_FORCE_RELIABLE, 762 FLAG_FLUSHABLE, 763 FLAG_EXT_CTRL, 764 FLAG_EFS_ENABLE, 765 FLAG_DEFER_SETUP, 766 FLAG_LE_CONN_REQ_SENT, 767 FLAG_ECRED_CONN_REQ_SENT, 768 FLAG_PENDING_SECURITY, 769 FLAG_HOLD_HCI_CONN, 770 }; 771 772 /* Lock nesting levels for L2CAP channels. We need these because lockdep 773 * otherwise considers all channels equal and will e.g. complain about a 774 * connection oriented channel triggering SMP procedures or a listening 775 * channel creating and locking a child channel. 776 */ 777 enum { 778 L2CAP_NESTING_SMP, 779 L2CAP_NESTING_NORMAL, 780 L2CAP_NESTING_PARENT, 781 }; 782 783 enum { 784 L2CAP_TX_STATE_XMIT, 785 L2CAP_TX_STATE_WAIT_F, 786 }; 787 788 enum { 789 L2CAP_RX_STATE_RECV, 790 L2CAP_RX_STATE_SREJ_SENT, 791 L2CAP_RX_STATE_MOVE, 792 L2CAP_RX_STATE_WAIT_P, 793 L2CAP_RX_STATE_WAIT_F, 794 }; 795 796 enum { 797 L2CAP_TXSEQ_EXPECTED, 798 L2CAP_TXSEQ_EXPECTED_SREJ, 799 L2CAP_TXSEQ_UNEXPECTED, 800 L2CAP_TXSEQ_UNEXPECTED_SREJ, 801 L2CAP_TXSEQ_DUPLICATE, 802 L2CAP_TXSEQ_DUPLICATE_SREJ, 803 L2CAP_TXSEQ_INVALID, 804 L2CAP_TXSEQ_INVALID_IGNORE, 805 }; 806 807 enum { 808 L2CAP_EV_DATA_REQUEST, 809 L2CAP_EV_LOCAL_BUSY_DETECTED, 810 L2CAP_EV_LOCAL_BUSY_CLEAR, 811 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 812 L2CAP_EV_RECV_FBIT, 813 L2CAP_EV_RETRANS_TO, 814 L2CAP_EV_MONITOR_TO, 815 L2CAP_EV_EXPLICIT_POLL, 816 L2CAP_EV_RECV_IFRAME, 817 L2CAP_EV_RECV_RR, 818 L2CAP_EV_RECV_REJ, 819 L2CAP_EV_RECV_RNR, 820 L2CAP_EV_RECV_SREJ, 821 L2CAP_EV_RECV_FRAME, 822 }; 823 824 enum { 825 L2CAP_MOVE_ROLE_NONE, 826 L2CAP_MOVE_ROLE_INITIATOR, 827 L2CAP_MOVE_ROLE_RESPONDER, 828 }; 829 830 enum { 831 L2CAP_MOVE_STABLE, 832 L2CAP_MOVE_WAIT_REQ, 833 L2CAP_MOVE_WAIT_RSP, 834 L2CAP_MOVE_WAIT_RSP_SUCCESS, 835 L2CAP_MOVE_WAIT_CONFIRM, 836 L2CAP_MOVE_WAIT_CONFIRM_RSP, 837 L2CAP_MOVE_WAIT_LOGICAL_COMP, 838 L2CAP_MOVE_WAIT_LOGICAL_CFM, 839 L2CAP_MOVE_WAIT_LOCAL_BUSY, 840 L2CAP_MOVE_WAIT_PREPARE, 841 }; 842 843 void l2cap_chan_hold(struct l2cap_chan *c); 844 void l2cap_chan_put(struct l2cap_chan *c); 845 846 static inline void l2cap_chan_lock(struct l2cap_chan *chan) 847 { 848 mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting)); 849 } 850 851 static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 852 { 853 mutex_unlock(&chan->lock); 854 } 855 856 static inline void l2cap_set_timer(struct l2cap_chan *chan, 857 struct delayed_work *work, long timeout) 858 { 859 BT_DBG("chan %p state %s timeout %ld", chan, 860 state_to_string(chan->state), timeout); 861 862 /* If delayed work cancelled do not hold(chan) 863 since it is already done with previous set_timer */ 864 if (!cancel_delayed_work(work)) 865 l2cap_chan_hold(chan); 866 867 schedule_delayed_work(work, timeout); 868 } 869 870 static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 871 struct delayed_work *work) 872 { 873 bool ret; 874 875 /* put(chan) if delayed work cancelled otherwise it 876 is done in delayed work function */ 877 ret = cancel_delayed_work(work); 878 if (ret) 879 l2cap_chan_put(chan); 880 881 return ret; 882 } 883 884 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 885 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 886 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 887 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 888 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 889 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 890 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 891 892 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 893 { 894 if (seq1 >= seq2) 895 return seq1 - seq2; 896 else 897 return chan->tx_win_max + 1 - seq2 + seq1; 898 } 899 900 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 901 { 902 return (seq + 1) % (chan->tx_win_max + 1); 903 } 904 905 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 906 { 907 return NULL; 908 } 909 910 static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb) 911 { 912 return -ENOSYS; 913 } 914 915 static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan, 916 unsigned long hdr_len, 917 unsigned long len, int nb) 918 { 919 return ERR_PTR(-ENOSYS); 920 } 921 922 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 923 { 924 } 925 926 static inline void l2cap_chan_no_close(struct l2cap_chan *chan) 927 { 928 } 929 930 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 931 { 932 } 933 934 static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan, 935 int state, int err) 936 { 937 } 938 939 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) 940 { 941 } 942 943 static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan) 944 { 945 } 946 947 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) 948 { 949 } 950 951 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) 952 { 953 } 954 955 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) 956 { 957 return 0; 958 } 959 960 extern bool disable_ertm; 961 extern bool enable_ecred; 962 963 int l2cap_init_sockets(void); 964 void l2cap_cleanup_sockets(void); 965 bool l2cap_is_socket(struct socket *sock); 966 967 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan); 968 void __l2cap_ecred_conn_rsp_defer(struct l2cap_chan *chan); 969 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 970 971 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 972 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 973 974 struct l2cap_chan *l2cap_chan_create(void); 975 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 976 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 977 bdaddr_t *dst, u8 dst_type); 978 int l2cap_chan_reconfigure(struct l2cap_chan *chan, __u16 mtu); 979 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len); 980 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 981 int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator); 982 void l2cap_chan_set_defaults(struct l2cap_chan *chan); 983 int l2cap_ertm_init(struct l2cap_chan *chan); 984 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 985 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 986 void l2cap_chan_del(struct l2cap_chan *chan, int err); 987 void l2cap_send_conn_req(struct l2cap_chan *chan); 988 void l2cap_move_start(struct l2cap_chan *chan); 989 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, 990 u8 status); 991 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result); 992 993 struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn); 994 void l2cap_conn_put(struct l2cap_conn *conn); 995 996 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); 997 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); 998 999 #endif /* __L2CAP_H */ 1000