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 122 123 /* L2CAP extended feature mask */ 124 #define L2CAP_FEAT_FLOWCTL 0x00000001 125 #define L2CAP_FEAT_RETRANS 0x00000002 126 #define L2CAP_FEAT_BIDIR_QOS 0x00000004 127 #define L2CAP_FEAT_ERTM 0x00000008 128 #define L2CAP_FEAT_STREAMING 0x00000010 129 #define L2CAP_FEAT_FCS 0x00000020 130 #define L2CAP_FEAT_EXT_FLOW 0x00000040 131 #define L2CAP_FEAT_FIXED_CHAN 0x00000080 132 #define L2CAP_FEAT_EXT_WINDOW 0x00000100 133 #define L2CAP_FEAT_UCD 0x00000200 134 135 /* L2CAP checksum option */ 136 #define L2CAP_FCS_NONE 0x00 137 #define L2CAP_FCS_CRC16 0x01 138 139 /* L2CAP fixed channels */ 140 #define L2CAP_FC_SIG_BREDR 0x02 141 #define L2CAP_FC_CONNLESS 0x04 142 #define L2CAP_FC_A2MP 0x08 143 #define L2CAP_FC_ATT 0x10 144 #define L2CAP_FC_SIG_LE 0x20 145 #define L2CAP_FC_SMP_LE 0x40 146 #define L2CAP_FC_SMP_BREDR 0x80 147 148 /* L2CAP Control Field bit masks */ 149 #define L2CAP_CTRL_SAR 0xC000 150 #define L2CAP_CTRL_REQSEQ 0x3F00 151 #define L2CAP_CTRL_TXSEQ 0x007E 152 #define L2CAP_CTRL_SUPERVISE 0x000C 153 154 #define L2CAP_CTRL_RETRANS 0x0080 155 #define L2CAP_CTRL_FINAL 0x0080 156 #define L2CAP_CTRL_POLL 0x0010 157 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 158 159 #define L2CAP_CTRL_TXSEQ_SHIFT 1 160 #define L2CAP_CTRL_SUPER_SHIFT 2 161 #define L2CAP_CTRL_POLL_SHIFT 4 162 #define L2CAP_CTRL_FINAL_SHIFT 7 163 #define L2CAP_CTRL_REQSEQ_SHIFT 8 164 #define L2CAP_CTRL_SAR_SHIFT 14 165 166 /* L2CAP Extended Control Field bit mask */ 167 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 168 #define L2CAP_EXT_CTRL_SAR 0x00030000 169 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 170 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 171 172 #define L2CAP_EXT_CTRL_POLL 0x00040000 173 #define L2CAP_EXT_CTRL_FINAL 0x00000002 174 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 175 176 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1 177 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 178 #define L2CAP_EXT_CTRL_SAR_SHIFT 16 179 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 180 #define L2CAP_EXT_CTRL_POLL_SHIFT 18 181 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 182 183 /* L2CAP Supervisory Function */ 184 #define L2CAP_SUPER_RR 0x00 185 #define L2CAP_SUPER_REJ 0x01 186 #define L2CAP_SUPER_RNR 0x02 187 #define L2CAP_SUPER_SREJ 0x03 188 189 /* L2CAP Segmentation and Reassembly */ 190 #define L2CAP_SAR_UNSEGMENTED 0x00 191 #define L2CAP_SAR_START 0x01 192 #define L2CAP_SAR_END 0x02 193 #define L2CAP_SAR_CONTINUE 0x03 194 195 /* L2CAP Command rej. reasons */ 196 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 197 #define L2CAP_REJ_MTU_EXCEEDED 0x0001 198 #define L2CAP_REJ_INVALID_CID 0x0002 199 200 /* L2CAP structures */ 201 struct l2cap_hdr { 202 __le16 len; 203 __le16 cid; 204 } __packed; 205 #define L2CAP_HDR_SIZE 4 206 #define L2CAP_ENH_HDR_SIZE 6 207 #define L2CAP_EXT_HDR_SIZE 8 208 209 #define L2CAP_FCS_SIZE 2 210 #define L2CAP_SDULEN_SIZE 2 211 #define L2CAP_PSMLEN_SIZE 2 212 #define L2CAP_ENH_CTRL_SIZE 2 213 #define L2CAP_EXT_CTRL_SIZE 4 214 215 struct l2cap_cmd_hdr { 216 __u8 code; 217 __u8 ident; 218 __le16 len; 219 } __packed; 220 #define L2CAP_CMD_HDR_SIZE 4 221 222 struct l2cap_cmd_rej_unk { 223 __le16 reason; 224 } __packed; 225 226 struct l2cap_cmd_rej_mtu { 227 __le16 reason; 228 __le16 max_mtu; 229 } __packed; 230 231 struct l2cap_cmd_rej_cid { 232 __le16 reason; 233 __le16 scid; 234 __le16 dcid; 235 } __packed; 236 237 struct l2cap_conn_req { 238 __le16 psm; 239 __le16 scid; 240 } __packed; 241 242 struct l2cap_conn_rsp { 243 __le16 dcid; 244 __le16 scid; 245 __le16 result; 246 __le16 status; 247 } __packed; 248 249 /* protocol/service multiplexer (PSM) */ 250 #define L2CAP_PSM_SDP 0x0001 251 #define L2CAP_PSM_RFCOMM 0x0003 252 #define L2CAP_PSM_3DSP 0x0021 253 #define L2CAP_PSM_IPSP 0x0023 /* 6LoWPAN */ 254 255 #define L2CAP_PSM_DYN_START 0x1001 256 #define L2CAP_PSM_DYN_END 0xffff 257 #define L2CAP_PSM_AUTO_END 0x10ff 258 #define L2CAP_PSM_LE_DYN_START 0x0080 259 #define L2CAP_PSM_LE_DYN_END 0x00ff 260 261 /* channel identifier */ 262 #define L2CAP_CID_SIGNALING 0x0001 263 #define L2CAP_CID_CONN_LESS 0x0002 264 #define L2CAP_CID_A2MP 0x0003 265 #define L2CAP_CID_ATT 0x0004 266 #define L2CAP_CID_LE_SIGNALING 0x0005 267 #define L2CAP_CID_SMP 0x0006 268 #define L2CAP_CID_SMP_BREDR 0x0007 269 #define L2CAP_CID_DYN_START 0x0040 270 #define L2CAP_CID_DYN_END 0xffff 271 #define L2CAP_CID_LE_DYN_END 0x007f 272 273 /* connect/create channel results */ 274 #define L2CAP_CR_SUCCESS 0x0000 275 #define L2CAP_CR_PEND 0x0001 276 #define L2CAP_CR_BAD_PSM 0x0002 277 #define L2CAP_CR_SEC_BLOCK 0x0003 278 #define L2CAP_CR_NO_MEM 0x0004 279 #define L2CAP_CR_BAD_AMP 0x0005 280 #define L2CAP_CR_AUTHENTICATION 0x0005 281 #define L2CAP_CR_AUTHORIZATION 0x0006 282 #define L2CAP_CR_BAD_KEY_SIZE 0x0007 283 #define L2CAP_CR_ENCRYPTION 0x0008 284 #define L2CAP_CR_INVALID_SCID 0x0009 285 #define L2CAP_CR_SCID_IN_USE 0x000A 286 287 /* connect/create channel status */ 288 #define L2CAP_CS_NO_INFO 0x0000 289 #define L2CAP_CS_AUTHEN_PEND 0x0001 290 #define L2CAP_CS_AUTHOR_PEND 0x0002 291 292 struct l2cap_conf_req { 293 __le16 dcid; 294 __le16 flags; 295 __u8 data[0]; 296 } __packed; 297 298 struct l2cap_conf_rsp { 299 __le16 scid; 300 __le16 flags; 301 __le16 result; 302 __u8 data[0]; 303 } __packed; 304 305 #define L2CAP_CONF_SUCCESS 0x0000 306 #define L2CAP_CONF_UNACCEPT 0x0001 307 #define L2CAP_CONF_REJECT 0x0002 308 #define L2CAP_CONF_UNKNOWN 0x0003 309 #define L2CAP_CONF_PENDING 0x0004 310 #define L2CAP_CONF_EFS_REJECT 0x0005 311 312 /* configuration req/rsp continuation flag */ 313 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 314 315 struct l2cap_conf_opt { 316 __u8 type; 317 __u8 len; 318 __u8 val[0]; 319 } __packed; 320 #define L2CAP_CONF_OPT_SIZE 2 321 322 #define L2CAP_CONF_HINT 0x80 323 #define L2CAP_CONF_MASK 0x7f 324 325 #define L2CAP_CONF_MTU 0x01 326 #define L2CAP_CONF_FLUSH_TO 0x02 327 #define L2CAP_CONF_QOS 0x03 328 #define L2CAP_CONF_RFC 0x04 329 #define L2CAP_CONF_FCS 0x05 330 #define L2CAP_CONF_EFS 0x06 331 #define L2CAP_CONF_EWS 0x07 332 333 #define L2CAP_CONF_MAX_SIZE 22 334 335 struct l2cap_conf_rfc { 336 __u8 mode; 337 __u8 txwin_size; 338 __u8 max_transmit; 339 __le16 retrans_timeout; 340 __le16 monitor_timeout; 341 __le16 max_pdu_size; 342 } __packed; 343 344 #define L2CAP_MODE_BASIC 0x00 345 #define L2CAP_MODE_RETRANS 0x01 346 #define L2CAP_MODE_FLOWCTL 0x02 347 #define L2CAP_MODE_ERTM 0x03 348 #define L2CAP_MODE_STREAMING 0x04 349 350 /* Unlike the above this one doesn't actually map to anything that would 351 * ever be sent over the air. Therefore, use a value that's unlikely to 352 * ever be used in the BR/EDR configuration phase. 353 */ 354 #define L2CAP_MODE_LE_FLOWCTL 0x80 355 356 struct l2cap_conf_efs { 357 __u8 id; 358 __u8 stype; 359 __le16 msdu; 360 __le32 sdu_itime; 361 __le32 acc_lat; 362 __le32 flush_to; 363 } __packed; 364 365 #define L2CAP_SERV_NOTRAFIC 0x00 366 #define L2CAP_SERV_BESTEFFORT 0x01 367 #define L2CAP_SERV_GUARANTEED 0x02 368 369 #define L2CAP_BESTEFFORT_ID 0x01 370 371 struct l2cap_disconn_req { 372 __le16 dcid; 373 __le16 scid; 374 } __packed; 375 376 struct l2cap_disconn_rsp { 377 __le16 dcid; 378 __le16 scid; 379 } __packed; 380 381 struct l2cap_info_req { 382 __le16 type; 383 } __packed; 384 385 struct l2cap_info_rsp { 386 __le16 type; 387 __le16 result; 388 __u8 data[0]; 389 } __packed; 390 391 struct l2cap_create_chan_req { 392 __le16 psm; 393 __le16 scid; 394 __u8 amp_id; 395 } __packed; 396 397 struct l2cap_create_chan_rsp { 398 __le16 dcid; 399 __le16 scid; 400 __le16 result; 401 __le16 status; 402 } __packed; 403 404 struct l2cap_move_chan_req { 405 __le16 icid; 406 __u8 dest_amp_id; 407 } __packed; 408 409 struct l2cap_move_chan_rsp { 410 __le16 icid; 411 __le16 result; 412 } __packed; 413 414 #define L2CAP_MR_SUCCESS 0x0000 415 #define L2CAP_MR_PEND 0x0001 416 #define L2CAP_MR_BAD_ID 0x0002 417 #define L2CAP_MR_SAME_ID 0x0003 418 #define L2CAP_MR_NOT_SUPP 0x0004 419 #define L2CAP_MR_COLLISION 0x0005 420 #define L2CAP_MR_NOT_ALLOWED 0x0006 421 422 struct l2cap_move_chan_cfm { 423 __le16 icid; 424 __le16 result; 425 } __packed; 426 427 #define L2CAP_MC_CONFIRMED 0x0000 428 #define L2CAP_MC_UNCONFIRMED 0x0001 429 430 struct l2cap_move_chan_cfm_rsp { 431 __le16 icid; 432 } __packed; 433 434 /* info type */ 435 #define L2CAP_IT_CL_MTU 0x0001 436 #define L2CAP_IT_FEAT_MASK 0x0002 437 #define L2CAP_IT_FIXED_CHAN 0x0003 438 439 /* info result */ 440 #define L2CAP_IR_SUCCESS 0x0000 441 #define L2CAP_IR_NOTSUPP 0x0001 442 443 struct l2cap_conn_param_update_req { 444 __le16 min; 445 __le16 max; 446 __le16 latency; 447 __le16 to_multiplier; 448 } __packed; 449 450 struct l2cap_conn_param_update_rsp { 451 __le16 result; 452 } __packed; 453 454 /* Connection Parameters result */ 455 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 456 #define L2CAP_CONN_PARAM_REJECTED 0x0001 457 458 struct l2cap_le_conn_req { 459 __le16 psm; 460 __le16 scid; 461 __le16 mtu; 462 __le16 mps; 463 __le16 credits; 464 } __packed; 465 466 struct l2cap_le_conn_rsp { 467 __le16 dcid; 468 __le16 mtu; 469 __le16 mps; 470 __le16 credits; 471 __le16 result; 472 } __packed; 473 474 struct l2cap_le_credits { 475 __le16 cid; 476 __le16 credits; 477 } __packed; 478 479 /* ----- L2CAP channels and connections ----- */ 480 struct l2cap_seq_list { 481 __u16 head; 482 __u16 tail; 483 __u16 mask; 484 __u16 *list; 485 }; 486 487 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF 488 #define L2CAP_SEQ_LIST_TAIL 0x8000 489 490 struct l2cap_chan { 491 struct l2cap_conn *conn; 492 struct hci_conn *hs_hcon; 493 struct hci_chan *hs_hchan; 494 struct kref kref; 495 atomic_t nesting; 496 497 __u8 state; 498 499 bdaddr_t dst; 500 __u8 dst_type; 501 bdaddr_t src; 502 __u8 src_type; 503 __le16 psm; 504 __le16 sport; 505 __u16 dcid; 506 __u16 scid; 507 508 __u16 imtu; 509 __u16 omtu; 510 __u16 flush_to; 511 __u8 mode; 512 __u8 chan_type; 513 __u8 chan_policy; 514 515 __u8 sec_level; 516 517 __u8 ident; 518 519 __u8 conf_req[64]; 520 __u8 conf_len; 521 __u8 num_conf_req; 522 __u8 num_conf_rsp; 523 524 __u8 fcs; 525 526 __u16 tx_win; 527 __u16 tx_win_max; 528 __u16 ack_win; 529 __u8 max_tx; 530 __u16 retrans_timeout; 531 __u16 monitor_timeout; 532 __u16 mps; 533 534 __u16 tx_credits; 535 __u16 rx_credits; 536 537 __u8 tx_state; 538 __u8 rx_state; 539 540 unsigned long conf_state; 541 unsigned long conn_state; 542 unsigned long flags; 543 544 __u8 remote_amp_id; 545 __u8 local_amp_id; 546 __u8 move_id; 547 __u8 move_state; 548 __u8 move_role; 549 550 __u16 next_tx_seq; 551 __u16 expected_ack_seq; 552 __u16 expected_tx_seq; 553 __u16 buffer_seq; 554 __u16 srej_save_reqseq; 555 __u16 last_acked_seq; 556 __u16 frames_sent; 557 __u16 unacked_frames; 558 __u8 retry_count; 559 __u16 sdu_len; 560 struct sk_buff *sdu; 561 struct sk_buff *sdu_last_frag; 562 563 __u16 remote_tx_win; 564 __u8 remote_max_tx; 565 __u16 remote_mps; 566 567 __u8 local_id; 568 __u8 local_stype; 569 __u16 local_msdu; 570 __u32 local_sdu_itime; 571 __u32 local_acc_lat; 572 __u32 local_flush_to; 573 574 __u8 remote_id; 575 __u8 remote_stype; 576 __u16 remote_msdu; 577 __u32 remote_sdu_itime; 578 __u32 remote_acc_lat; 579 __u32 remote_flush_to; 580 581 struct delayed_work chan_timer; 582 struct delayed_work retrans_timer; 583 struct delayed_work monitor_timer; 584 struct delayed_work ack_timer; 585 586 struct sk_buff *tx_send_head; 587 struct sk_buff_head tx_q; 588 struct sk_buff_head srej_q; 589 struct l2cap_seq_list srej_list; 590 struct l2cap_seq_list retrans_list; 591 592 struct list_head list; 593 struct list_head global_l; 594 595 void *data; 596 const struct l2cap_ops *ops; 597 struct mutex lock; 598 }; 599 600 struct l2cap_ops { 601 char *name; 602 603 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 604 int (*recv) (struct l2cap_chan * chan, 605 struct sk_buff *skb); 606 void (*teardown) (struct l2cap_chan *chan, int err); 607 void (*close) (struct l2cap_chan *chan); 608 void (*state_change) (struct l2cap_chan *chan, 609 int state, int err); 610 void (*ready) (struct l2cap_chan *chan); 611 void (*defer) (struct l2cap_chan *chan); 612 void (*resume) (struct l2cap_chan *chan); 613 void (*suspend) (struct l2cap_chan *chan); 614 void (*set_shutdown) (struct l2cap_chan *chan); 615 long (*get_sndtimeo) (struct l2cap_chan *chan); 616 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 617 unsigned long hdr_len, 618 unsigned long len, int nb); 619 }; 620 621 struct l2cap_conn { 622 struct hci_conn *hcon; 623 struct hci_chan *hchan; 624 625 unsigned int mtu; 626 627 __u32 feat_mask; 628 __u8 remote_fixed_chan; 629 __u8 local_fixed_chan; 630 631 __u8 info_state; 632 __u8 info_ident; 633 634 struct delayed_work info_timer; 635 636 struct sk_buff *rx_skb; 637 __u32 rx_len; 638 __u8 tx_ident; 639 struct mutex ident_lock; 640 641 struct sk_buff_head pending_rx; 642 struct work_struct pending_rx_work; 643 644 struct work_struct id_addr_update_work; 645 646 __u8 disc_reason; 647 648 struct l2cap_chan *smp; 649 650 struct list_head chan_l; 651 struct mutex chan_lock; 652 struct kref ref; 653 struct list_head users; 654 }; 655 656 struct l2cap_user { 657 struct list_head list; 658 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); 659 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); 660 }; 661 662 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 663 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 664 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 665 666 #define L2CAP_CHAN_RAW 1 667 #define L2CAP_CHAN_CONN_LESS 2 668 #define L2CAP_CHAN_CONN_ORIENTED 3 669 #define L2CAP_CHAN_FIXED 4 670 671 /* ----- L2CAP socket info ----- */ 672 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 673 674 struct l2cap_pinfo { 675 struct bt_sock bt; 676 struct l2cap_chan *chan; 677 struct sk_buff *rx_busy_skb; 678 }; 679 680 enum { 681 CONF_REQ_SENT, 682 CONF_INPUT_DONE, 683 CONF_OUTPUT_DONE, 684 CONF_MTU_DONE, 685 CONF_MODE_DONE, 686 CONF_CONNECT_PEND, 687 CONF_RECV_NO_FCS, 688 CONF_STATE2_DEVICE, 689 CONF_EWS_RECV, 690 CONF_LOC_CONF_PEND, 691 CONF_REM_CONF_PEND, 692 CONF_NOT_COMPLETE, 693 }; 694 695 #define L2CAP_CONF_MAX_CONF_REQ 2 696 #define L2CAP_CONF_MAX_CONF_RSP 2 697 698 enum { 699 CONN_SREJ_SENT, 700 CONN_WAIT_F, 701 CONN_SREJ_ACT, 702 CONN_SEND_PBIT, 703 CONN_REMOTE_BUSY, 704 CONN_LOCAL_BUSY, 705 CONN_REJ_ACT, 706 CONN_SEND_FBIT, 707 CONN_RNR_SENT, 708 }; 709 710 /* Definitions for flags in l2cap_chan */ 711 enum { 712 FLAG_ROLE_SWITCH, 713 FLAG_FORCE_ACTIVE, 714 FLAG_FORCE_RELIABLE, 715 FLAG_FLUSHABLE, 716 FLAG_EXT_CTRL, 717 FLAG_EFS_ENABLE, 718 FLAG_DEFER_SETUP, 719 FLAG_LE_CONN_REQ_SENT, 720 FLAG_PENDING_SECURITY, 721 FLAG_HOLD_HCI_CONN, 722 }; 723 724 /* Lock nesting levels for L2CAP channels. We need these because lockdep 725 * otherwise considers all channels equal and will e.g. complain about a 726 * connection oriented channel triggering SMP procedures or a listening 727 * channel creating and locking a child channel. 728 */ 729 enum { 730 L2CAP_NESTING_SMP, 731 L2CAP_NESTING_NORMAL, 732 L2CAP_NESTING_PARENT, 733 }; 734 735 enum { 736 L2CAP_TX_STATE_XMIT, 737 L2CAP_TX_STATE_WAIT_F, 738 }; 739 740 enum { 741 L2CAP_RX_STATE_RECV, 742 L2CAP_RX_STATE_SREJ_SENT, 743 L2CAP_RX_STATE_MOVE, 744 L2CAP_RX_STATE_WAIT_P, 745 L2CAP_RX_STATE_WAIT_F, 746 }; 747 748 enum { 749 L2CAP_TXSEQ_EXPECTED, 750 L2CAP_TXSEQ_EXPECTED_SREJ, 751 L2CAP_TXSEQ_UNEXPECTED, 752 L2CAP_TXSEQ_UNEXPECTED_SREJ, 753 L2CAP_TXSEQ_DUPLICATE, 754 L2CAP_TXSEQ_DUPLICATE_SREJ, 755 L2CAP_TXSEQ_INVALID, 756 L2CAP_TXSEQ_INVALID_IGNORE, 757 }; 758 759 enum { 760 L2CAP_EV_DATA_REQUEST, 761 L2CAP_EV_LOCAL_BUSY_DETECTED, 762 L2CAP_EV_LOCAL_BUSY_CLEAR, 763 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 764 L2CAP_EV_RECV_FBIT, 765 L2CAP_EV_RETRANS_TO, 766 L2CAP_EV_MONITOR_TO, 767 L2CAP_EV_EXPLICIT_POLL, 768 L2CAP_EV_RECV_IFRAME, 769 L2CAP_EV_RECV_RR, 770 L2CAP_EV_RECV_REJ, 771 L2CAP_EV_RECV_RNR, 772 L2CAP_EV_RECV_SREJ, 773 L2CAP_EV_RECV_FRAME, 774 }; 775 776 enum { 777 L2CAP_MOVE_ROLE_NONE, 778 L2CAP_MOVE_ROLE_INITIATOR, 779 L2CAP_MOVE_ROLE_RESPONDER, 780 }; 781 782 enum { 783 L2CAP_MOVE_STABLE, 784 L2CAP_MOVE_WAIT_REQ, 785 L2CAP_MOVE_WAIT_RSP, 786 L2CAP_MOVE_WAIT_RSP_SUCCESS, 787 L2CAP_MOVE_WAIT_CONFIRM, 788 L2CAP_MOVE_WAIT_CONFIRM_RSP, 789 L2CAP_MOVE_WAIT_LOGICAL_COMP, 790 L2CAP_MOVE_WAIT_LOGICAL_CFM, 791 L2CAP_MOVE_WAIT_LOCAL_BUSY, 792 L2CAP_MOVE_WAIT_PREPARE, 793 }; 794 795 void l2cap_chan_hold(struct l2cap_chan *c); 796 void l2cap_chan_put(struct l2cap_chan *c); 797 798 static inline void l2cap_chan_lock(struct l2cap_chan *chan) 799 { 800 mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting)); 801 } 802 803 static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 804 { 805 mutex_unlock(&chan->lock); 806 } 807 808 static inline void l2cap_set_timer(struct l2cap_chan *chan, 809 struct delayed_work *work, long timeout) 810 { 811 BT_DBG("chan %p state %s timeout %ld", chan, 812 state_to_string(chan->state), timeout); 813 814 /* If delayed work cancelled do not hold(chan) 815 since it is already done with previous set_timer */ 816 if (!cancel_delayed_work(work)) 817 l2cap_chan_hold(chan); 818 819 schedule_delayed_work(work, timeout); 820 } 821 822 static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 823 struct delayed_work *work) 824 { 825 bool ret; 826 827 /* put(chan) if delayed work cancelled otherwise it 828 is done in delayed work function */ 829 ret = cancel_delayed_work(work); 830 if (ret) 831 l2cap_chan_put(chan); 832 833 return ret; 834 } 835 836 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 837 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 838 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 839 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 840 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 841 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 842 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 843 844 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 845 { 846 if (seq1 >= seq2) 847 return seq1 - seq2; 848 else 849 return chan->tx_win_max + 1 - seq2 + seq1; 850 } 851 852 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 853 { 854 return (seq + 1) % (chan->tx_win_max + 1); 855 } 856 857 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 858 { 859 return NULL; 860 } 861 862 static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb) 863 { 864 return -ENOSYS; 865 } 866 867 static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan, 868 unsigned long hdr_len, 869 unsigned long len, int nb) 870 { 871 return ERR_PTR(-ENOSYS); 872 } 873 874 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 875 { 876 } 877 878 static inline void l2cap_chan_no_close(struct l2cap_chan *chan) 879 { 880 } 881 882 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 883 { 884 } 885 886 static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan, 887 int state, int err) 888 { 889 } 890 891 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) 892 { 893 } 894 895 static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan) 896 { 897 } 898 899 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) 900 { 901 } 902 903 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) 904 { 905 } 906 907 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) 908 { 909 return 0; 910 } 911 912 extern bool disable_ertm; 913 914 int l2cap_init_sockets(void); 915 void l2cap_cleanup_sockets(void); 916 bool l2cap_is_socket(struct socket *sock); 917 918 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan); 919 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 920 921 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 922 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 923 924 struct l2cap_chan *l2cap_chan_create(void); 925 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 926 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 927 bdaddr_t *dst, u8 dst_type); 928 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len); 929 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 930 int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator); 931 void l2cap_chan_set_defaults(struct l2cap_chan *chan); 932 int l2cap_ertm_init(struct l2cap_chan *chan); 933 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 934 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 935 void l2cap_chan_del(struct l2cap_chan *chan, int err); 936 void l2cap_send_conn_req(struct l2cap_chan *chan); 937 void l2cap_move_start(struct l2cap_chan *chan); 938 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, 939 u8 status); 940 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result); 941 942 struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn); 943 void l2cap_conn_put(struct l2cap_conn *conn); 944 945 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); 946 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); 947 948 #endif /* __L2CAP_H */ 949