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 #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 #define L2CAP_A2MP_DEFAULT_MTU 670 63 64 /* L2CAP socket address */ 65 struct sockaddr_l2 { 66 sa_family_t l2_family; 67 __le16 l2_psm; 68 bdaddr_t l2_bdaddr; 69 __le16 l2_cid; 70 __u8 l2_bdaddr_type; 71 }; 72 73 /* L2CAP socket options */ 74 #define L2CAP_OPTIONS 0x01 75 struct l2cap_options { 76 __u16 omtu; 77 __u16 imtu; 78 __u16 flush_to; 79 __u8 mode; 80 __u8 fcs; 81 __u8 max_tx; 82 __u16 txwin_size; 83 }; 84 85 #define L2CAP_CONNINFO 0x02 86 struct l2cap_conninfo { 87 __u16 hci_handle; 88 __u8 dev_class[3]; 89 }; 90 91 #define L2CAP_LM 0x03 92 #define L2CAP_LM_MASTER 0x0001 93 #define L2CAP_LM_AUTH 0x0002 94 #define L2CAP_LM_ENCRYPT 0x0004 95 #define L2CAP_LM_TRUSTED 0x0008 96 #define L2CAP_LM_RELIABLE 0x0010 97 #define L2CAP_LM_SECURE 0x0020 98 #define L2CAP_LM_FIPS 0x0040 99 100 /* L2CAP command codes */ 101 #define L2CAP_COMMAND_REJ 0x01 102 #define L2CAP_CONN_REQ 0x02 103 #define L2CAP_CONN_RSP 0x03 104 #define L2CAP_CONF_REQ 0x04 105 #define L2CAP_CONF_RSP 0x05 106 #define L2CAP_DISCONN_REQ 0x06 107 #define L2CAP_DISCONN_RSP 0x07 108 #define L2CAP_ECHO_REQ 0x08 109 #define L2CAP_ECHO_RSP 0x09 110 #define L2CAP_INFO_REQ 0x0a 111 #define L2CAP_INFO_RSP 0x0b 112 #define L2CAP_CREATE_CHAN_REQ 0x0c 113 #define L2CAP_CREATE_CHAN_RSP 0x0d 114 #define L2CAP_MOVE_CHAN_REQ 0x0e 115 #define L2CAP_MOVE_CHAN_RSP 0x0f 116 #define L2CAP_MOVE_CHAN_CFM 0x10 117 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11 118 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12 119 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13 120 #define L2CAP_LE_CONN_REQ 0x14 121 #define L2CAP_LE_CONN_RSP 0x15 122 #define L2CAP_LE_CREDITS 0x16 123 #define L2CAP_ECRED_CONN_REQ 0x17 124 #define L2CAP_ECRED_CONN_RSP 0x18 125 #define L2CAP_ECRED_RECONF_REQ 0x19 126 #define L2CAP_ECRED_RECONF_RSP 0x1a 127 128 /* L2CAP extended feature mask */ 129 #define L2CAP_FEAT_FLOWCTL 0x00000001 130 #define L2CAP_FEAT_RETRANS 0x00000002 131 #define L2CAP_FEAT_BIDIR_QOS 0x00000004 132 #define L2CAP_FEAT_ERTM 0x00000008 133 #define L2CAP_FEAT_STREAMING 0x00000010 134 #define L2CAP_FEAT_FCS 0x00000020 135 #define L2CAP_FEAT_EXT_FLOW 0x00000040 136 #define L2CAP_FEAT_FIXED_CHAN 0x00000080 137 #define L2CAP_FEAT_EXT_WINDOW 0x00000100 138 #define L2CAP_FEAT_UCD 0x00000200 139 140 /* L2CAP checksum option */ 141 #define L2CAP_FCS_NONE 0x00 142 #define L2CAP_FCS_CRC16 0x01 143 144 /* L2CAP fixed channels */ 145 #define L2CAP_FC_SIG_BREDR 0x02 146 #define L2CAP_FC_CONNLESS 0x04 147 #define L2CAP_FC_A2MP 0x08 148 #define L2CAP_FC_ATT 0x10 149 #define L2CAP_FC_SIG_LE 0x20 150 #define L2CAP_FC_SMP_LE 0x40 151 #define L2CAP_FC_SMP_BREDR 0x80 152 153 /* L2CAP Control Field bit masks */ 154 #define L2CAP_CTRL_SAR 0xC000 155 #define L2CAP_CTRL_REQSEQ 0x3F00 156 #define L2CAP_CTRL_TXSEQ 0x007E 157 #define L2CAP_CTRL_SUPERVISE 0x000C 158 159 #define L2CAP_CTRL_RETRANS 0x0080 160 #define L2CAP_CTRL_FINAL 0x0080 161 #define L2CAP_CTRL_POLL 0x0010 162 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 163 164 #define L2CAP_CTRL_TXSEQ_SHIFT 1 165 #define L2CAP_CTRL_SUPER_SHIFT 2 166 #define L2CAP_CTRL_POLL_SHIFT 4 167 #define L2CAP_CTRL_FINAL_SHIFT 7 168 #define L2CAP_CTRL_REQSEQ_SHIFT 8 169 #define L2CAP_CTRL_SAR_SHIFT 14 170 171 /* L2CAP Extended Control Field bit mask */ 172 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 173 #define L2CAP_EXT_CTRL_SAR 0x00030000 174 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 175 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 176 177 #define L2CAP_EXT_CTRL_POLL 0x00040000 178 #define L2CAP_EXT_CTRL_FINAL 0x00000002 179 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 180 181 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1 182 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 183 #define L2CAP_EXT_CTRL_SAR_SHIFT 16 184 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 185 #define L2CAP_EXT_CTRL_POLL_SHIFT 18 186 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 187 188 /* L2CAP Supervisory Function */ 189 #define L2CAP_SUPER_RR 0x00 190 #define L2CAP_SUPER_REJ 0x01 191 #define L2CAP_SUPER_RNR 0x02 192 #define L2CAP_SUPER_SREJ 0x03 193 194 /* L2CAP Segmentation and Reassembly */ 195 #define L2CAP_SAR_UNSEGMENTED 0x00 196 #define L2CAP_SAR_START 0x01 197 #define L2CAP_SAR_END 0x02 198 #define L2CAP_SAR_CONTINUE 0x03 199 200 /* L2CAP Command rej. reasons */ 201 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 202 #define L2CAP_REJ_MTU_EXCEEDED 0x0001 203 #define L2CAP_REJ_INVALID_CID 0x0002 204 205 /* L2CAP structures */ 206 struct l2cap_hdr { 207 __le16 len; 208 __le16 cid; 209 } __packed; 210 #define L2CAP_HDR_SIZE 4 211 #define L2CAP_ENH_HDR_SIZE 6 212 #define L2CAP_EXT_HDR_SIZE 8 213 214 #define L2CAP_FCS_SIZE 2 215 #define L2CAP_SDULEN_SIZE 2 216 #define L2CAP_PSMLEN_SIZE 2 217 #define L2CAP_ENH_CTRL_SIZE 2 218 #define L2CAP_EXT_CTRL_SIZE 4 219 220 struct l2cap_cmd_hdr { 221 __u8 code; 222 __u8 ident; 223 __le16 len; 224 } __packed; 225 #define L2CAP_CMD_HDR_SIZE 4 226 227 struct l2cap_cmd_rej_unk { 228 __le16 reason; 229 } __packed; 230 231 struct l2cap_cmd_rej_mtu { 232 __le16 reason; 233 __le16 max_mtu; 234 } __packed; 235 236 struct l2cap_cmd_rej_cid { 237 __le16 reason; 238 __le16 scid; 239 __le16 dcid; 240 } __packed; 241 242 struct l2cap_conn_req { 243 __le16 psm; 244 __le16 scid; 245 } __packed; 246 247 struct l2cap_conn_rsp { 248 __le16 dcid; 249 __le16 scid; 250 __le16 result; 251 __le16 status; 252 } __packed; 253 254 /* protocol/service multiplexer (PSM) */ 255 #define L2CAP_PSM_SDP 0x0001 256 #define L2CAP_PSM_RFCOMM 0x0003 257 #define L2CAP_PSM_3DSP 0x0021 258 #define L2CAP_PSM_IPSP 0x0023 /* 6LoWPAN */ 259 260 #define L2CAP_PSM_DYN_START 0x1001 261 #define L2CAP_PSM_DYN_END 0xffff 262 #define L2CAP_PSM_AUTO_END 0x10ff 263 #define L2CAP_PSM_LE_DYN_START 0x0080 264 #define L2CAP_PSM_LE_DYN_END 0x00ff 265 266 /* channel identifier */ 267 #define L2CAP_CID_SIGNALING 0x0001 268 #define L2CAP_CID_CONN_LESS 0x0002 269 #define L2CAP_CID_A2MP 0x0003 270 #define L2CAP_CID_ATT 0x0004 271 #define L2CAP_CID_LE_SIGNALING 0x0005 272 #define L2CAP_CID_SMP 0x0006 273 #define L2CAP_CID_SMP_BREDR 0x0007 274 #define L2CAP_CID_DYN_START 0x0040 275 #define L2CAP_CID_DYN_END 0xffff 276 #define L2CAP_CID_LE_DYN_END 0x007f 277 278 /* connect/create channel results */ 279 #define L2CAP_CR_SUCCESS 0x0000 280 #define L2CAP_CR_PEND 0x0001 281 #define L2CAP_CR_BAD_PSM 0x0002 282 #define L2CAP_CR_SEC_BLOCK 0x0003 283 #define L2CAP_CR_NO_MEM 0x0004 284 #define L2CAP_CR_BAD_AMP 0x0005 285 #define L2CAP_CR_INVALID_SCID 0x0006 286 #define L2CAP_CR_SCID_IN_USE 0x0007 287 288 /* credit based connect results */ 289 #define L2CAP_CR_LE_SUCCESS 0x0000 290 #define L2CAP_CR_LE_BAD_PSM 0x0002 291 #define L2CAP_CR_LE_NO_MEM 0x0004 292 #define L2CAP_CR_LE_AUTHENTICATION 0x0005 293 #define L2CAP_CR_LE_AUTHORIZATION 0x0006 294 #define L2CAP_CR_LE_BAD_KEY_SIZE 0x0007 295 #define L2CAP_CR_LE_ENCRYPTION 0x0008 296 #define L2CAP_CR_LE_INVALID_SCID 0x0009 297 #define L2CAP_CR_LE_SCID_IN_USE 0X000A 298 #define L2CAP_CR_LE_UNACCEPT_PARAMS 0X000B 299 #define L2CAP_CR_LE_INVALID_PARAMS 0X000C 300 301 /* connect/create channel status */ 302 #define L2CAP_CS_NO_INFO 0x0000 303 #define L2CAP_CS_AUTHEN_PEND 0x0001 304 #define L2CAP_CS_AUTHOR_PEND 0x0002 305 306 struct l2cap_conf_req { 307 __le16 dcid; 308 __le16 flags; 309 __u8 data[]; 310 } __packed; 311 312 struct l2cap_conf_rsp { 313 __le16 scid; 314 __le16 flags; 315 __le16 result; 316 __u8 data[]; 317 } __packed; 318 319 #define L2CAP_CONF_SUCCESS 0x0000 320 #define L2CAP_CONF_UNACCEPT 0x0001 321 #define L2CAP_CONF_REJECT 0x0002 322 #define L2CAP_CONF_UNKNOWN 0x0003 323 #define L2CAP_CONF_PENDING 0x0004 324 #define L2CAP_CONF_EFS_REJECT 0x0005 325 326 /* configuration req/rsp continuation flag */ 327 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 328 329 struct l2cap_conf_opt { 330 __u8 type; 331 __u8 len; 332 __u8 val[]; 333 } __packed; 334 #define L2CAP_CONF_OPT_SIZE 2 335 336 #define L2CAP_CONF_HINT 0x80 337 #define L2CAP_CONF_MASK 0x7f 338 339 #define L2CAP_CONF_MTU 0x01 340 #define L2CAP_CONF_FLUSH_TO 0x02 341 #define L2CAP_CONF_QOS 0x03 342 #define L2CAP_CONF_RFC 0x04 343 #define L2CAP_CONF_FCS 0x05 344 #define L2CAP_CONF_EFS 0x06 345 #define L2CAP_CONF_EWS 0x07 346 347 #define L2CAP_CONF_MAX_SIZE 22 348 349 struct l2cap_conf_rfc { 350 __u8 mode; 351 __u8 txwin_size; 352 __u8 max_transmit; 353 __le16 retrans_timeout; 354 __le16 monitor_timeout; 355 __le16 max_pdu_size; 356 } __packed; 357 358 #define L2CAP_MODE_BASIC 0x00 359 #define L2CAP_MODE_RETRANS 0x01 360 #define L2CAP_MODE_FLOWCTL 0x02 361 #define L2CAP_MODE_ERTM 0x03 362 #define L2CAP_MODE_STREAMING 0x04 363 364 /* Unlike the above this one doesn't actually map to anything that would 365 * ever be sent over the air. Therefore, use a value that's unlikely to 366 * ever be used in the BR/EDR configuration phase. 367 */ 368 #define L2CAP_MODE_LE_FLOWCTL 0x80 369 #define L2CAP_MODE_EXT_FLOWCTL 0x81 370 371 struct l2cap_conf_efs { 372 __u8 id; 373 __u8 stype; 374 __le16 msdu; 375 __le32 sdu_itime; 376 __le32 acc_lat; 377 __le32 flush_to; 378 } __packed; 379 380 #define L2CAP_SERV_NOTRAFIC 0x00 381 #define L2CAP_SERV_BESTEFFORT 0x01 382 #define L2CAP_SERV_GUARANTEED 0x02 383 384 #define L2CAP_BESTEFFORT_ID 0x01 385 386 struct l2cap_disconn_req { 387 __le16 dcid; 388 __le16 scid; 389 } __packed; 390 391 struct l2cap_disconn_rsp { 392 __le16 dcid; 393 __le16 scid; 394 } __packed; 395 396 struct l2cap_info_req { 397 __le16 type; 398 } __packed; 399 400 struct l2cap_info_rsp { 401 __le16 type; 402 __le16 result; 403 __u8 data[]; 404 } __packed; 405 406 struct l2cap_create_chan_req { 407 __le16 psm; 408 __le16 scid; 409 __u8 amp_id; 410 } __packed; 411 412 struct l2cap_create_chan_rsp { 413 __le16 dcid; 414 __le16 scid; 415 __le16 result; 416 __le16 status; 417 } __packed; 418 419 struct l2cap_move_chan_req { 420 __le16 icid; 421 __u8 dest_amp_id; 422 } __packed; 423 424 struct l2cap_move_chan_rsp { 425 __le16 icid; 426 __le16 result; 427 } __packed; 428 429 #define L2CAP_MR_SUCCESS 0x0000 430 #define L2CAP_MR_PEND 0x0001 431 #define L2CAP_MR_BAD_ID 0x0002 432 #define L2CAP_MR_SAME_ID 0x0003 433 #define L2CAP_MR_NOT_SUPP 0x0004 434 #define L2CAP_MR_COLLISION 0x0005 435 #define L2CAP_MR_NOT_ALLOWED 0x0006 436 437 struct l2cap_move_chan_cfm { 438 __le16 icid; 439 __le16 result; 440 } __packed; 441 442 #define L2CAP_MC_CONFIRMED 0x0000 443 #define L2CAP_MC_UNCONFIRMED 0x0001 444 445 struct l2cap_move_chan_cfm_rsp { 446 __le16 icid; 447 } __packed; 448 449 /* info type */ 450 #define L2CAP_IT_CL_MTU 0x0001 451 #define L2CAP_IT_FEAT_MASK 0x0002 452 #define L2CAP_IT_FIXED_CHAN 0x0003 453 454 /* info result */ 455 #define L2CAP_IR_SUCCESS 0x0000 456 #define L2CAP_IR_NOTSUPP 0x0001 457 458 struct l2cap_conn_param_update_req { 459 __le16 min; 460 __le16 max; 461 __le16 latency; 462 __le16 to_multiplier; 463 } __packed; 464 465 struct l2cap_conn_param_update_rsp { 466 __le16 result; 467 } __packed; 468 469 /* Connection Parameters result */ 470 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 471 #define L2CAP_CONN_PARAM_REJECTED 0x0001 472 473 struct l2cap_le_conn_req { 474 __le16 psm; 475 __le16 scid; 476 __le16 mtu; 477 __le16 mps; 478 __le16 credits; 479 } __packed; 480 481 struct l2cap_le_conn_rsp { 482 __le16 dcid; 483 __le16 mtu; 484 __le16 mps; 485 __le16 credits; 486 __le16 result; 487 } __packed; 488 489 struct l2cap_le_credits { 490 __le16 cid; 491 __le16 credits; 492 } __packed; 493 494 #define L2CAP_ECRED_MIN_MTU 64 495 #define L2CAP_ECRED_MIN_MPS 64 496 497 struct l2cap_ecred_conn_req { 498 __le16 psm; 499 __le16 mtu; 500 __le16 mps; 501 __le16 credits; 502 __le16 scid[]; 503 } __packed; 504 505 struct l2cap_ecred_conn_rsp { 506 __le16 mtu; 507 __le16 mps; 508 __le16 credits; 509 __le16 result; 510 __le16 dcid[]; 511 }; 512 513 struct l2cap_ecred_reconf_req { 514 __le16 mtu; 515 __le16 mps; 516 __le16 scid[]; 517 } __packed; 518 519 #define L2CAP_RECONF_SUCCESS 0x0000 520 #define L2CAP_RECONF_INVALID_MTU 0x0001 521 #define L2CAP_RECONF_INVALID_MPS 0x0002 522 523 struct l2cap_ecred_reconf_rsp { 524 __le16 result; 525 } __packed; 526 527 /* ----- L2CAP channels and connections ----- */ 528 struct l2cap_seq_list { 529 __u16 head; 530 __u16 tail; 531 __u16 mask; 532 __u16 *list; 533 }; 534 535 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF 536 #define L2CAP_SEQ_LIST_TAIL 0x8000 537 538 struct l2cap_chan { 539 struct l2cap_conn *conn; 540 struct hci_conn *hs_hcon; 541 struct hci_chan *hs_hchan; 542 struct kref kref; 543 atomic_t nesting; 544 545 __u8 state; 546 547 bdaddr_t dst; 548 __u8 dst_type; 549 bdaddr_t src; 550 __u8 src_type; 551 __le16 psm; 552 __le16 sport; 553 __u16 dcid; 554 __u16 scid; 555 556 __u16 imtu; 557 __u16 omtu; 558 __u16 flush_to; 559 __u8 mode; 560 __u8 chan_type; 561 __u8 chan_policy; 562 563 __u8 sec_level; 564 565 __u8 ident; 566 567 __u8 conf_req[64]; 568 __u8 conf_len; 569 __u8 num_conf_req; 570 __u8 num_conf_rsp; 571 572 __u8 fcs; 573 574 __u16 tx_win; 575 __u16 tx_win_max; 576 __u16 ack_win; 577 __u8 max_tx; 578 __u16 retrans_timeout; 579 __u16 monitor_timeout; 580 __u16 mps; 581 582 __u16 tx_credits; 583 __u16 rx_credits; 584 585 __u8 tx_state; 586 __u8 rx_state; 587 588 unsigned long conf_state; 589 unsigned long conn_state; 590 unsigned long flags; 591 592 __u8 remote_amp_id; 593 __u8 local_amp_id; 594 __u8 move_id; 595 __u8 move_state; 596 __u8 move_role; 597 598 __u16 next_tx_seq; 599 __u16 expected_ack_seq; 600 __u16 expected_tx_seq; 601 __u16 buffer_seq; 602 __u16 srej_save_reqseq; 603 __u16 last_acked_seq; 604 __u16 frames_sent; 605 __u16 unacked_frames; 606 __u8 retry_count; 607 __u16 sdu_len; 608 struct sk_buff *sdu; 609 struct sk_buff *sdu_last_frag; 610 611 __u16 remote_tx_win; 612 __u8 remote_max_tx; 613 __u16 remote_mps; 614 615 __u8 local_id; 616 __u8 local_stype; 617 __u16 local_msdu; 618 __u32 local_sdu_itime; 619 __u32 local_acc_lat; 620 __u32 local_flush_to; 621 622 __u8 remote_id; 623 __u8 remote_stype; 624 __u16 remote_msdu; 625 __u32 remote_sdu_itime; 626 __u32 remote_acc_lat; 627 __u32 remote_flush_to; 628 629 struct delayed_work chan_timer; 630 struct delayed_work retrans_timer; 631 struct delayed_work monitor_timer; 632 struct delayed_work ack_timer; 633 634 struct sk_buff *tx_send_head; 635 struct sk_buff_head tx_q; 636 struct sk_buff_head srej_q; 637 struct l2cap_seq_list srej_list; 638 struct l2cap_seq_list retrans_list; 639 640 struct list_head list; 641 struct list_head global_l; 642 643 void *data; 644 const struct l2cap_ops *ops; 645 struct mutex lock; 646 }; 647 648 struct l2cap_ops { 649 char *name; 650 651 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 652 int (*recv) (struct l2cap_chan * chan, 653 struct sk_buff *skb); 654 void (*teardown) (struct l2cap_chan *chan, int err); 655 void (*close) (struct l2cap_chan *chan); 656 void (*state_change) (struct l2cap_chan *chan, 657 int state, int err); 658 void (*ready) (struct l2cap_chan *chan); 659 void (*defer) (struct l2cap_chan *chan); 660 void (*resume) (struct l2cap_chan *chan); 661 void (*suspend) (struct l2cap_chan *chan); 662 void (*set_shutdown) (struct l2cap_chan *chan); 663 long (*get_sndtimeo) (struct l2cap_chan *chan); 664 struct pid *(*get_peer_pid) (struct l2cap_chan *chan); 665 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 666 unsigned long hdr_len, 667 unsigned long len, int nb); 668 int (*filter) (struct l2cap_chan * chan, 669 struct sk_buff *skb); 670 }; 671 672 struct l2cap_conn { 673 struct hci_conn *hcon; 674 struct hci_chan *hchan; 675 676 unsigned int mtu; 677 678 __u32 feat_mask; 679 __u8 remote_fixed_chan; 680 __u8 local_fixed_chan; 681 682 __u8 info_state; 683 __u8 info_ident; 684 685 struct delayed_work info_timer; 686 687 struct sk_buff *rx_skb; 688 __u32 rx_len; 689 __u8 tx_ident; 690 struct mutex ident_lock; 691 692 struct sk_buff_head pending_rx; 693 struct work_struct pending_rx_work; 694 695 struct work_struct id_addr_update_work; 696 697 __u8 disc_reason; 698 699 struct l2cap_chan *smp; 700 701 struct list_head chan_l; 702 struct mutex chan_lock; 703 struct kref ref; 704 struct list_head users; 705 }; 706 707 struct l2cap_user { 708 struct list_head list; 709 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); 710 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); 711 }; 712 713 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 714 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 715 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 716 717 #define L2CAP_CHAN_RAW 1 718 #define L2CAP_CHAN_CONN_LESS 2 719 #define L2CAP_CHAN_CONN_ORIENTED 3 720 #define L2CAP_CHAN_FIXED 4 721 722 /* ----- L2CAP socket info ----- */ 723 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 724 725 struct l2cap_pinfo { 726 struct bt_sock bt; 727 struct l2cap_chan *chan; 728 struct sk_buff *rx_busy_skb; 729 }; 730 731 enum { 732 CONF_REQ_SENT, 733 CONF_INPUT_DONE, 734 CONF_OUTPUT_DONE, 735 CONF_MTU_DONE, 736 CONF_MODE_DONE, 737 CONF_CONNECT_PEND, 738 CONF_RECV_NO_FCS, 739 CONF_STATE2_DEVICE, 740 CONF_EWS_RECV, 741 CONF_LOC_CONF_PEND, 742 CONF_REM_CONF_PEND, 743 CONF_NOT_COMPLETE, 744 }; 745 746 #define L2CAP_CONF_MAX_CONF_REQ 2 747 #define L2CAP_CONF_MAX_CONF_RSP 2 748 749 enum { 750 CONN_SREJ_SENT, 751 CONN_WAIT_F, 752 CONN_SREJ_ACT, 753 CONN_SEND_PBIT, 754 CONN_REMOTE_BUSY, 755 CONN_LOCAL_BUSY, 756 CONN_REJ_ACT, 757 CONN_SEND_FBIT, 758 CONN_RNR_SENT, 759 }; 760 761 /* Definitions for flags in l2cap_chan */ 762 enum { 763 FLAG_ROLE_SWITCH, 764 FLAG_FORCE_ACTIVE, 765 FLAG_FORCE_RELIABLE, 766 FLAG_FLUSHABLE, 767 FLAG_EXT_CTRL, 768 FLAG_EFS_ENABLE, 769 FLAG_DEFER_SETUP, 770 FLAG_LE_CONN_REQ_SENT, 771 FLAG_ECRED_CONN_REQ_SENT, 772 FLAG_PENDING_SECURITY, 773 FLAG_HOLD_HCI_CONN, 774 }; 775 776 /* Lock nesting levels for L2CAP channels. We need these because lockdep 777 * otherwise considers all channels equal and will e.g. complain about a 778 * connection oriented channel triggering SMP procedures or a listening 779 * channel creating and locking a child channel. 780 */ 781 enum { 782 L2CAP_NESTING_SMP, 783 L2CAP_NESTING_NORMAL, 784 L2CAP_NESTING_PARENT, 785 }; 786 787 enum { 788 L2CAP_TX_STATE_XMIT, 789 L2CAP_TX_STATE_WAIT_F, 790 }; 791 792 enum { 793 L2CAP_RX_STATE_RECV, 794 L2CAP_RX_STATE_SREJ_SENT, 795 L2CAP_RX_STATE_MOVE, 796 L2CAP_RX_STATE_WAIT_P, 797 L2CAP_RX_STATE_WAIT_F, 798 }; 799 800 enum { 801 L2CAP_TXSEQ_EXPECTED, 802 L2CAP_TXSEQ_EXPECTED_SREJ, 803 L2CAP_TXSEQ_UNEXPECTED, 804 L2CAP_TXSEQ_UNEXPECTED_SREJ, 805 L2CAP_TXSEQ_DUPLICATE, 806 L2CAP_TXSEQ_DUPLICATE_SREJ, 807 L2CAP_TXSEQ_INVALID, 808 L2CAP_TXSEQ_INVALID_IGNORE, 809 }; 810 811 enum { 812 L2CAP_EV_DATA_REQUEST, 813 L2CAP_EV_LOCAL_BUSY_DETECTED, 814 L2CAP_EV_LOCAL_BUSY_CLEAR, 815 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 816 L2CAP_EV_RECV_FBIT, 817 L2CAP_EV_RETRANS_TO, 818 L2CAP_EV_MONITOR_TO, 819 L2CAP_EV_EXPLICIT_POLL, 820 L2CAP_EV_RECV_IFRAME, 821 L2CAP_EV_RECV_RR, 822 L2CAP_EV_RECV_REJ, 823 L2CAP_EV_RECV_RNR, 824 L2CAP_EV_RECV_SREJ, 825 L2CAP_EV_RECV_FRAME, 826 }; 827 828 enum { 829 L2CAP_MOVE_ROLE_NONE, 830 L2CAP_MOVE_ROLE_INITIATOR, 831 L2CAP_MOVE_ROLE_RESPONDER, 832 }; 833 834 enum { 835 L2CAP_MOVE_STABLE, 836 L2CAP_MOVE_WAIT_REQ, 837 L2CAP_MOVE_WAIT_RSP, 838 L2CAP_MOVE_WAIT_RSP_SUCCESS, 839 L2CAP_MOVE_WAIT_CONFIRM, 840 L2CAP_MOVE_WAIT_CONFIRM_RSP, 841 L2CAP_MOVE_WAIT_LOGICAL_COMP, 842 L2CAP_MOVE_WAIT_LOGICAL_CFM, 843 L2CAP_MOVE_WAIT_LOCAL_BUSY, 844 L2CAP_MOVE_WAIT_PREPARE, 845 }; 846 847 void l2cap_chan_hold(struct l2cap_chan *c); 848 void l2cap_chan_put(struct l2cap_chan *c); 849 850 static inline void l2cap_chan_lock(struct l2cap_chan *chan) 851 { 852 mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting)); 853 } 854 855 static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 856 { 857 mutex_unlock(&chan->lock); 858 } 859 860 static inline void l2cap_set_timer(struct l2cap_chan *chan, 861 struct delayed_work *work, long timeout) 862 { 863 BT_DBG("chan %p state %s timeout %ld", chan, 864 state_to_string(chan->state), timeout); 865 866 /* If delayed work cancelled do not hold(chan) 867 since it is already done with previous set_timer */ 868 if (!cancel_delayed_work(work)) 869 l2cap_chan_hold(chan); 870 871 schedule_delayed_work(work, timeout); 872 } 873 874 static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 875 struct delayed_work *work) 876 { 877 bool ret; 878 879 /* put(chan) if delayed work cancelled otherwise it 880 is done in delayed work function */ 881 ret = cancel_delayed_work(work); 882 if (ret) 883 l2cap_chan_put(chan); 884 885 return ret; 886 } 887 888 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 889 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 890 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 891 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 892 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 893 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 894 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 895 896 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 897 { 898 if (seq1 >= seq2) 899 return seq1 - seq2; 900 else 901 return chan->tx_win_max + 1 - seq2 + seq1; 902 } 903 904 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 905 { 906 return (seq + 1) % (chan->tx_win_max + 1); 907 } 908 909 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 910 { 911 return NULL; 912 } 913 914 static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb) 915 { 916 return -ENOSYS; 917 } 918 919 static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan, 920 unsigned long hdr_len, 921 unsigned long len, int nb) 922 { 923 return ERR_PTR(-ENOSYS); 924 } 925 926 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 927 { 928 } 929 930 static inline void l2cap_chan_no_close(struct l2cap_chan *chan) 931 { 932 } 933 934 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 935 { 936 } 937 938 static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan, 939 int state, int err) 940 { 941 } 942 943 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) 944 { 945 } 946 947 static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan) 948 { 949 } 950 951 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) 952 { 953 } 954 955 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) 956 { 957 } 958 959 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) 960 { 961 return 0; 962 } 963 964 extern bool disable_ertm; 965 extern bool enable_ecred; 966 967 int l2cap_init_sockets(void); 968 void l2cap_cleanup_sockets(void); 969 bool l2cap_is_socket(struct socket *sock); 970 971 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan); 972 void __l2cap_ecred_conn_rsp_defer(struct l2cap_chan *chan); 973 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 974 975 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 976 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 977 978 struct l2cap_chan *l2cap_chan_create(void); 979 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 980 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 981 bdaddr_t *dst, u8 dst_type); 982 int l2cap_chan_reconfigure(struct l2cap_chan *chan, __u16 mtu); 983 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len); 984 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 985 int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator); 986 void l2cap_chan_set_defaults(struct l2cap_chan *chan); 987 int l2cap_ertm_init(struct l2cap_chan *chan); 988 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 989 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 990 typedef void (*l2cap_chan_func_t)(struct l2cap_chan *chan, void *data); 991 void l2cap_chan_list(struct l2cap_conn *conn, l2cap_chan_func_t func, 992 void *data); 993 void l2cap_chan_del(struct l2cap_chan *chan, int err); 994 void l2cap_send_conn_req(struct l2cap_chan *chan); 995 void l2cap_move_start(struct l2cap_chan *chan); 996 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, 997 u8 status); 998 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result); 999 1000 struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn); 1001 void l2cap_conn_put(struct l2cap_conn *conn); 1002 1003 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); 1004 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); 1005 1006 #endif /* __L2CAP_H */ 1007