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 59 #define L2CAP_A2MP_DEFAULT_MTU 670 60 61 /* L2CAP socket address */ 62 struct sockaddr_l2 { 63 sa_family_t l2_family; 64 __le16 l2_psm; 65 bdaddr_t l2_bdaddr; 66 __le16 l2_cid; 67 __u8 l2_bdaddr_type; 68 }; 69 70 /* L2CAP socket options */ 71 #define L2CAP_OPTIONS 0x01 72 struct l2cap_options { 73 __u16 omtu; 74 __u16 imtu; 75 __u16 flush_to; 76 __u8 mode; 77 __u8 fcs; 78 __u8 max_tx; 79 __u16 txwin_size; 80 }; 81 82 #define L2CAP_CONNINFO 0x02 83 struct l2cap_conninfo { 84 __u16 hci_handle; 85 __u8 dev_class[3]; 86 }; 87 88 #define L2CAP_LM 0x03 89 #define L2CAP_LM_MASTER 0x0001 90 #define L2CAP_LM_AUTH 0x0002 91 #define L2CAP_LM_ENCRYPT 0x0004 92 #define L2CAP_LM_TRUSTED 0x0008 93 #define L2CAP_LM_RELIABLE 0x0010 94 #define L2CAP_LM_SECURE 0x0020 95 #define L2CAP_LM_FIPS 0x0040 96 97 /* L2CAP command codes */ 98 #define L2CAP_COMMAND_REJ 0x01 99 #define L2CAP_CONN_REQ 0x02 100 #define L2CAP_CONN_RSP 0x03 101 #define L2CAP_CONF_REQ 0x04 102 #define L2CAP_CONF_RSP 0x05 103 #define L2CAP_DISCONN_REQ 0x06 104 #define L2CAP_DISCONN_RSP 0x07 105 #define L2CAP_ECHO_REQ 0x08 106 #define L2CAP_ECHO_RSP 0x09 107 #define L2CAP_INFO_REQ 0x0a 108 #define L2CAP_INFO_RSP 0x0b 109 #define L2CAP_CREATE_CHAN_REQ 0x0c 110 #define L2CAP_CREATE_CHAN_RSP 0x0d 111 #define L2CAP_MOVE_CHAN_REQ 0x0e 112 #define L2CAP_MOVE_CHAN_RSP 0x0f 113 #define L2CAP_MOVE_CHAN_CFM 0x10 114 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11 115 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12 116 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13 117 #define L2CAP_LE_CONN_REQ 0x14 118 #define L2CAP_LE_CONN_RSP 0x15 119 #define L2CAP_LE_CREDITS 0x16 120 121 /* L2CAP extended feature mask */ 122 #define L2CAP_FEAT_FLOWCTL 0x00000001 123 #define L2CAP_FEAT_RETRANS 0x00000002 124 #define L2CAP_FEAT_BIDIR_QOS 0x00000004 125 #define L2CAP_FEAT_ERTM 0x00000008 126 #define L2CAP_FEAT_STREAMING 0x00000010 127 #define L2CAP_FEAT_FCS 0x00000020 128 #define L2CAP_FEAT_EXT_FLOW 0x00000040 129 #define L2CAP_FEAT_FIXED_CHAN 0x00000080 130 #define L2CAP_FEAT_EXT_WINDOW 0x00000100 131 #define L2CAP_FEAT_UCD 0x00000200 132 133 /* L2CAP checksum option */ 134 #define L2CAP_FCS_NONE 0x00 135 #define L2CAP_FCS_CRC16 0x01 136 137 /* L2CAP fixed channels */ 138 #define L2CAP_FC_SIG_BREDR 0x02 139 #define L2CAP_FC_CONNLESS 0x04 140 #define L2CAP_FC_A2MP 0x08 141 #define L2CAP_FC_ATT 0x10 142 #define L2CAP_FC_SIG_LE 0x20 143 #define L2CAP_FC_SMP_LE 0x40 144 #define L2CAP_FC_SMP_BREDR 0x80 145 146 /* L2CAP Control Field bit masks */ 147 #define L2CAP_CTRL_SAR 0xC000 148 #define L2CAP_CTRL_REQSEQ 0x3F00 149 #define L2CAP_CTRL_TXSEQ 0x007E 150 #define L2CAP_CTRL_SUPERVISE 0x000C 151 152 #define L2CAP_CTRL_RETRANS 0x0080 153 #define L2CAP_CTRL_FINAL 0x0080 154 #define L2CAP_CTRL_POLL 0x0010 155 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 156 157 #define L2CAP_CTRL_TXSEQ_SHIFT 1 158 #define L2CAP_CTRL_SUPER_SHIFT 2 159 #define L2CAP_CTRL_POLL_SHIFT 4 160 #define L2CAP_CTRL_FINAL_SHIFT 7 161 #define L2CAP_CTRL_REQSEQ_SHIFT 8 162 #define L2CAP_CTRL_SAR_SHIFT 14 163 164 /* L2CAP Extended Control Field bit mask */ 165 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 166 #define L2CAP_EXT_CTRL_SAR 0x00030000 167 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 168 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 169 170 #define L2CAP_EXT_CTRL_POLL 0x00040000 171 #define L2CAP_EXT_CTRL_FINAL 0x00000002 172 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 173 174 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1 175 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 176 #define L2CAP_EXT_CTRL_SAR_SHIFT 16 177 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 178 #define L2CAP_EXT_CTRL_POLL_SHIFT 18 179 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 180 181 /* L2CAP Supervisory Function */ 182 #define L2CAP_SUPER_RR 0x00 183 #define L2CAP_SUPER_REJ 0x01 184 #define L2CAP_SUPER_RNR 0x02 185 #define L2CAP_SUPER_SREJ 0x03 186 187 /* L2CAP Segmentation and Reassembly */ 188 #define L2CAP_SAR_UNSEGMENTED 0x00 189 #define L2CAP_SAR_START 0x01 190 #define L2CAP_SAR_END 0x02 191 #define L2CAP_SAR_CONTINUE 0x03 192 193 /* L2CAP Command rej. reasons */ 194 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 195 #define L2CAP_REJ_MTU_EXCEEDED 0x0001 196 #define L2CAP_REJ_INVALID_CID 0x0002 197 198 /* L2CAP structures */ 199 struct l2cap_hdr { 200 __le16 len; 201 __le16 cid; 202 } __packed; 203 #define L2CAP_HDR_SIZE 4 204 #define L2CAP_ENH_HDR_SIZE 6 205 #define L2CAP_EXT_HDR_SIZE 8 206 207 #define L2CAP_FCS_SIZE 2 208 #define L2CAP_SDULEN_SIZE 2 209 #define L2CAP_PSMLEN_SIZE 2 210 #define L2CAP_ENH_CTRL_SIZE 2 211 #define L2CAP_EXT_CTRL_SIZE 4 212 213 struct l2cap_cmd_hdr { 214 __u8 code; 215 __u8 ident; 216 __le16 len; 217 } __packed; 218 #define L2CAP_CMD_HDR_SIZE 4 219 220 struct l2cap_cmd_rej_unk { 221 __le16 reason; 222 } __packed; 223 224 struct l2cap_cmd_rej_mtu { 225 __le16 reason; 226 __le16 max_mtu; 227 } __packed; 228 229 struct l2cap_cmd_rej_cid { 230 __le16 reason; 231 __le16 scid; 232 __le16 dcid; 233 } __packed; 234 235 struct l2cap_conn_req { 236 __le16 psm; 237 __le16 scid; 238 } __packed; 239 240 struct l2cap_conn_rsp { 241 __le16 dcid; 242 __le16 scid; 243 __le16 result; 244 __le16 status; 245 } __packed; 246 247 /* protocol/service multiplexer (PSM) */ 248 #define L2CAP_PSM_SDP 0x0001 249 #define L2CAP_PSM_RFCOMM 0x0003 250 #define L2CAP_PSM_3DSP 0x0021 251 252 /* channel identifier */ 253 #define L2CAP_CID_SIGNALING 0x0001 254 #define L2CAP_CID_CONN_LESS 0x0002 255 #define L2CAP_CID_A2MP 0x0003 256 #define L2CAP_CID_ATT 0x0004 257 #define L2CAP_CID_LE_SIGNALING 0x0005 258 #define L2CAP_CID_SMP 0x0006 259 #define L2CAP_CID_SMP_BREDR 0x0007 260 #define L2CAP_CID_DYN_START 0x0040 261 #define L2CAP_CID_DYN_END 0xffff 262 #define L2CAP_CID_LE_DYN_END 0x007f 263 264 /* connect/create channel results */ 265 #define L2CAP_CR_SUCCESS 0x0000 266 #define L2CAP_CR_PEND 0x0001 267 #define L2CAP_CR_BAD_PSM 0x0002 268 #define L2CAP_CR_SEC_BLOCK 0x0003 269 #define L2CAP_CR_NO_MEM 0x0004 270 #define L2CAP_CR_BAD_AMP 0x0005 271 #define L2CAP_CR_AUTHENTICATION 0x0005 272 #define L2CAP_CR_AUTHORIZATION 0x0006 273 #define L2CAP_CR_BAD_KEY_SIZE 0x0007 274 #define L2CAP_CR_ENCRYPTION 0x0008 275 276 /* connect/create channel status */ 277 #define L2CAP_CS_NO_INFO 0x0000 278 #define L2CAP_CS_AUTHEN_PEND 0x0001 279 #define L2CAP_CS_AUTHOR_PEND 0x0002 280 281 struct l2cap_conf_req { 282 __le16 dcid; 283 __le16 flags; 284 __u8 data[0]; 285 } __packed; 286 287 struct l2cap_conf_rsp { 288 __le16 scid; 289 __le16 flags; 290 __le16 result; 291 __u8 data[0]; 292 } __packed; 293 294 #define L2CAP_CONF_SUCCESS 0x0000 295 #define L2CAP_CONF_UNACCEPT 0x0001 296 #define L2CAP_CONF_REJECT 0x0002 297 #define L2CAP_CONF_UNKNOWN 0x0003 298 #define L2CAP_CONF_PENDING 0x0004 299 #define L2CAP_CONF_EFS_REJECT 0x0005 300 301 /* configuration req/rsp continuation flag */ 302 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 303 304 struct l2cap_conf_opt { 305 __u8 type; 306 __u8 len; 307 __u8 val[0]; 308 } __packed; 309 #define L2CAP_CONF_OPT_SIZE 2 310 311 #define L2CAP_CONF_HINT 0x80 312 #define L2CAP_CONF_MASK 0x7f 313 314 #define L2CAP_CONF_MTU 0x01 315 #define L2CAP_CONF_FLUSH_TO 0x02 316 #define L2CAP_CONF_QOS 0x03 317 #define L2CAP_CONF_RFC 0x04 318 #define L2CAP_CONF_FCS 0x05 319 #define L2CAP_CONF_EFS 0x06 320 #define L2CAP_CONF_EWS 0x07 321 322 #define L2CAP_CONF_MAX_SIZE 22 323 324 struct l2cap_conf_rfc { 325 __u8 mode; 326 __u8 txwin_size; 327 __u8 max_transmit; 328 __le16 retrans_timeout; 329 __le16 monitor_timeout; 330 __le16 max_pdu_size; 331 } __packed; 332 333 #define L2CAP_MODE_BASIC 0x00 334 #define L2CAP_MODE_RETRANS 0x01 335 #define L2CAP_MODE_FLOWCTL 0x02 336 #define L2CAP_MODE_ERTM 0x03 337 #define L2CAP_MODE_STREAMING 0x04 338 339 /* Unlike the above this one doesn't actually map to anything that would 340 * ever be sent over the air. Therefore, use a value that's unlikely to 341 * ever be used in the BR/EDR configuration phase. 342 */ 343 #define L2CAP_MODE_LE_FLOWCTL 0x80 344 345 struct l2cap_conf_efs { 346 __u8 id; 347 __u8 stype; 348 __le16 msdu; 349 __le32 sdu_itime; 350 __le32 acc_lat; 351 __le32 flush_to; 352 } __packed; 353 354 #define L2CAP_SERV_NOTRAFIC 0x00 355 #define L2CAP_SERV_BESTEFFORT 0x01 356 #define L2CAP_SERV_GUARANTEED 0x02 357 358 #define L2CAP_BESTEFFORT_ID 0x01 359 360 struct l2cap_disconn_req { 361 __le16 dcid; 362 __le16 scid; 363 } __packed; 364 365 struct l2cap_disconn_rsp { 366 __le16 dcid; 367 __le16 scid; 368 } __packed; 369 370 struct l2cap_info_req { 371 __le16 type; 372 } __packed; 373 374 struct l2cap_info_rsp { 375 __le16 type; 376 __le16 result; 377 __u8 data[0]; 378 } __packed; 379 380 struct l2cap_create_chan_req { 381 __le16 psm; 382 __le16 scid; 383 __u8 amp_id; 384 } __packed; 385 386 struct l2cap_create_chan_rsp { 387 __le16 dcid; 388 __le16 scid; 389 __le16 result; 390 __le16 status; 391 } __packed; 392 393 struct l2cap_move_chan_req { 394 __le16 icid; 395 __u8 dest_amp_id; 396 } __packed; 397 398 struct l2cap_move_chan_rsp { 399 __le16 icid; 400 __le16 result; 401 } __packed; 402 403 #define L2CAP_MR_SUCCESS 0x0000 404 #define L2CAP_MR_PEND 0x0001 405 #define L2CAP_MR_BAD_ID 0x0002 406 #define L2CAP_MR_SAME_ID 0x0003 407 #define L2CAP_MR_NOT_SUPP 0x0004 408 #define L2CAP_MR_COLLISION 0x0005 409 #define L2CAP_MR_NOT_ALLOWED 0x0006 410 411 struct l2cap_move_chan_cfm { 412 __le16 icid; 413 __le16 result; 414 } __packed; 415 416 #define L2CAP_MC_CONFIRMED 0x0000 417 #define L2CAP_MC_UNCONFIRMED 0x0001 418 419 struct l2cap_move_chan_cfm_rsp { 420 __le16 icid; 421 } __packed; 422 423 /* info type */ 424 #define L2CAP_IT_CL_MTU 0x0001 425 #define L2CAP_IT_FEAT_MASK 0x0002 426 #define L2CAP_IT_FIXED_CHAN 0x0003 427 428 /* info result */ 429 #define L2CAP_IR_SUCCESS 0x0000 430 #define L2CAP_IR_NOTSUPP 0x0001 431 432 struct l2cap_conn_param_update_req { 433 __le16 min; 434 __le16 max; 435 __le16 latency; 436 __le16 to_multiplier; 437 } __packed; 438 439 struct l2cap_conn_param_update_rsp { 440 __le16 result; 441 } __packed; 442 443 /* Connection Parameters result */ 444 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 445 #define L2CAP_CONN_PARAM_REJECTED 0x0001 446 447 #define L2CAP_LE_MAX_CREDITS 10 448 #define L2CAP_LE_DEFAULT_MPS 230 449 450 struct l2cap_le_conn_req { 451 __le16 psm; 452 __le16 scid; 453 __le16 mtu; 454 __le16 mps; 455 __le16 credits; 456 } __packed; 457 458 struct l2cap_le_conn_rsp { 459 __le16 dcid; 460 __le16 mtu; 461 __le16 mps; 462 __le16 credits; 463 __le16 result; 464 } __packed; 465 466 struct l2cap_le_credits { 467 __le16 cid; 468 __le16 credits; 469 } __packed; 470 471 /* ----- L2CAP channels and connections ----- */ 472 struct l2cap_seq_list { 473 __u16 head; 474 __u16 tail; 475 __u16 mask; 476 __u16 *list; 477 }; 478 479 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF 480 #define L2CAP_SEQ_LIST_TAIL 0x8000 481 482 struct l2cap_chan { 483 struct l2cap_conn *conn; 484 struct hci_conn *hs_hcon; 485 struct hci_chan *hs_hchan; 486 struct kref kref; 487 atomic_t nesting; 488 489 __u8 state; 490 491 bdaddr_t dst; 492 __u8 dst_type; 493 bdaddr_t src; 494 __u8 src_type; 495 __le16 psm; 496 __le16 sport; 497 __u16 dcid; 498 __u16 scid; 499 500 __u16 imtu; 501 __u16 omtu; 502 __u16 flush_to; 503 __u8 mode; 504 __u8 chan_type; 505 __u8 chan_policy; 506 507 __u8 sec_level; 508 509 __u8 ident; 510 511 __u8 conf_req[64]; 512 __u8 conf_len; 513 __u8 num_conf_req; 514 __u8 num_conf_rsp; 515 516 __u8 fcs; 517 518 __u16 tx_win; 519 __u16 tx_win_max; 520 __u16 ack_win; 521 __u8 max_tx; 522 __u16 retrans_timeout; 523 __u16 monitor_timeout; 524 __u16 mps; 525 526 __u16 tx_credits; 527 __u16 rx_credits; 528 529 __u8 tx_state; 530 __u8 rx_state; 531 532 unsigned long conf_state; 533 unsigned long conn_state; 534 unsigned long flags; 535 536 __u8 remote_amp_id; 537 __u8 local_amp_id; 538 __u8 move_id; 539 __u8 move_state; 540 __u8 move_role; 541 542 __u16 next_tx_seq; 543 __u16 expected_ack_seq; 544 __u16 expected_tx_seq; 545 __u16 buffer_seq; 546 __u16 srej_save_reqseq; 547 __u16 last_acked_seq; 548 __u16 frames_sent; 549 __u16 unacked_frames; 550 __u8 retry_count; 551 __u16 sdu_len; 552 struct sk_buff *sdu; 553 struct sk_buff *sdu_last_frag; 554 555 __u16 remote_tx_win; 556 __u8 remote_max_tx; 557 __u16 remote_mps; 558 559 __u8 local_id; 560 __u8 local_stype; 561 __u16 local_msdu; 562 __u32 local_sdu_itime; 563 __u32 local_acc_lat; 564 __u32 local_flush_to; 565 566 __u8 remote_id; 567 __u8 remote_stype; 568 __u16 remote_msdu; 569 __u32 remote_sdu_itime; 570 __u32 remote_acc_lat; 571 __u32 remote_flush_to; 572 573 struct delayed_work chan_timer; 574 struct delayed_work retrans_timer; 575 struct delayed_work monitor_timer; 576 struct delayed_work ack_timer; 577 578 struct sk_buff *tx_send_head; 579 struct sk_buff_head tx_q; 580 struct sk_buff_head srej_q; 581 struct l2cap_seq_list srej_list; 582 struct l2cap_seq_list retrans_list; 583 584 struct list_head list; 585 struct list_head global_l; 586 587 void *data; 588 const struct l2cap_ops *ops; 589 struct mutex lock; 590 }; 591 592 struct l2cap_ops { 593 char *name; 594 595 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 596 int (*recv) (struct l2cap_chan * chan, 597 struct sk_buff *skb); 598 void (*teardown) (struct l2cap_chan *chan, int err); 599 void (*close) (struct l2cap_chan *chan); 600 void (*state_change) (struct l2cap_chan *chan, 601 int state, int err); 602 void (*ready) (struct l2cap_chan *chan); 603 void (*defer) (struct l2cap_chan *chan); 604 void (*resume) (struct l2cap_chan *chan); 605 void (*suspend) (struct l2cap_chan *chan); 606 void (*set_shutdown) (struct l2cap_chan *chan); 607 long (*get_sndtimeo) (struct l2cap_chan *chan); 608 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 609 unsigned long hdr_len, 610 unsigned long len, int nb); 611 }; 612 613 struct l2cap_conn { 614 struct hci_conn *hcon; 615 struct hci_chan *hchan; 616 617 unsigned int mtu; 618 619 __u32 feat_mask; 620 __u8 remote_fixed_chan; 621 __u8 local_fixed_chan; 622 623 __u8 info_state; 624 __u8 info_ident; 625 626 struct delayed_work info_timer; 627 628 struct sk_buff *rx_skb; 629 __u32 rx_len; 630 __u8 tx_ident; 631 struct mutex ident_lock; 632 633 struct sk_buff_head pending_rx; 634 struct work_struct pending_rx_work; 635 636 struct work_struct id_addr_update_work; 637 638 __u8 disc_reason; 639 640 struct l2cap_chan *smp; 641 642 struct list_head chan_l; 643 struct mutex chan_lock; 644 struct kref ref; 645 struct list_head users; 646 }; 647 648 struct l2cap_user { 649 struct list_head list; 650 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); 651 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); 652 }; 653 654 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 655 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 656 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 657 658 #define L2CAP_CHAN_RAW 1 659 #define L2CAP_CHAN_CONN_LESS 2 660 #define L2CAP_CHAN_CONN_ORIENTED 3 661 #define L2CAP_CHAN_FIXED 4 662 663 /* ----- L2CAP socket info ----- */ 664 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 665 666 struct l2cap_pinfo { 667 struct bt_sock bt; 668 struct l2cap_chan *chan; 669 struct sk_buff *rx_busy_skb; 670 }; 671 672 enum { 673 CONF_REQ_SENT, 674 CONF_INPUT_DONE, 675 CONF_OUTPUT_DONE, 676 CONF_MTU_DONE, 677 CONF_MODE_DONE, 678 CONF_CONNECT_PEND, 679 CONF_RECV_NO_FCS, 680 CONF_STATE2_DEVICE, 681 CONF_EWS_RECV, 682 CONF_LOC_CONF_PEND, 683 CONF_REM_CONF_PEND, 684 CONF_NOT_COMPLETE, 685 }; 686 687 #define L2CAP_CONF_MAX_CONF_REQ 2 688 #define L2CAP_CONF_MAX_CONF_RSP 2 689 690 enum { 691 CONN_SREJ_SENT, 692 CONN_WAIT_F, 693 CONN_SREJ_ACT, 694 CONN_SEND_PBIT, 695 CONN_REMOTE_BUSY, 696 CONN_LOCAL_BUSY, 697 CONN_REJ_ACT, 698 CONN_SEND_FBIT, 699 CONN_RNR_SENT, 700 }; 701 702 /* Definitions for flags in l2cap_chan */ 703 enum { 704 FLAG_ROLE_SWITCH, 705 FLAG_FORCE_ACTIVE, 706 FLAG_FORCE_RELIABLE, 707 FLAG_FLUSHABLE, 708 FLAG_EXT_CTRL, 709 FLAG_EFS_ENABLE, 710 FLAG_DEFER_SETUP, 711 FLAG_LE_CONN_REQ_SENT, 712 FLAG_PENDING_SECURITY, 713 FLAG_HOLD_HCI_CONN, 714 }; 715 716 /* Lock nesting levels for L2CAP channels. We need these because lockdep 717 * otherwise considers all channels equal and will e.g. complain about a 718 * connection oriented channel triggering SMP procedures or a listening 719 * channel creating and locking a child channel. 720 */ 721 enum { 722 L2CAP_NESTING_SMP, 723 L2CAP_NESTING_NORMAL, 724 L2CAP_NESTING_PARENT, 725 }; 726 727 enum { 728 L2CAP_TX_STATE_XMIT, 729 L2CAP_TX_STATE_WAIT_F, 730 }; 731 732 enum { 733 L2CAP_RX_STATE_RECV, 734 L2CAP_RX_STATE_SREJ_SENT, 735 L2CAP_RX_STATE_MOVE, 736 L2CAP_RX_STATE_WAIT_P, 737 L2CAP_RX_STATE_WAIT_F, 738 }; 739 740 enum { 741 L2CAP_TXSEQ_EXPECTED, 742 L2CAP_TXSEQ_EXPECTED_SREJ, 743 L2CAP_TXSEQ_UNEXPECTED, 744 L2CAP_TXSEQ_UNEXPECTED_SREJ, 745 L2CAP_TXSEQ_DUPLICATE, 746 L2CAP_TXSEQ_DUPLICATE_SREJ, 747 L2CAP_TXSEQ_INVALID, 748 L2CAP_TXSEQ_INVALID_IGNORE, 749 }; 750 751 enum { 752 L2CAP_EV_DATA_REQUEST, 753 L2CAP_EV_LOCAL_BUSY_DETECTED, 754 L2CAP_EV_LOCAL_BUSY_CLEAR, 755 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 756 L2CAP_EV_RECV_FBIT, 757 L2CAP_EV_RETRANS_TO, 758 L2CAP_EV_MONITOR_TO, 759 L2CAP_EV_EXPLICIT_POLL, 760 L2CAP_EV_RECV_IFRAME, 761 L2CAP_EV_RECV_RR, 762 L2CAP_EV_RECV_REJ, 763 L2CAP_EV_RECV_RNR, 764 L2CAP_EV_RECV_SREJ, 765 L2CAP_EV_RECV_FRAME, 766 }; 767 768 enum { 769 L2CAP_MOVE_ROLE_NONE, 770 L2CAP_MOVE_ROLE_INITIATOR, 771 L2CAP_MOVE_ROLE_RESPONDER, 772 }; 773 774 enum { 775 L2CAP_MOVE_STABLE, 776 L2CAP_MOVE_WAIT_REQ, 777 L2CAP_MOVE_WAIT_RSP, 778 L2CAP_MOVE_WAIT_RSP_SUCCESS, 779 L2CAP_MOVE_WAIT_CONFIRM, 780 L2CAP_MOVE_WAIT_CONFIRM_RSP, 781 L2CAP_MOVE_WAIT_LOGICAL_COMP, 782 L2CAP_MOVE_WAIT_LOGICAL_CFM, 783 L2CAP_MOVE_WAIT_LOCAL_BUSY, 784 L2CAP_MOVE_WAIT_PREPARE, 785 }; 786 787 void l2cap_chan_hold(struct l2cap_chan *c); 788 void l2cap_chan_put(struct l2cap_chan *c); 789 790 static inline void l2cap_chan_lock(struct l2cap_chan *chan) 791 { 792 mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting)); 793 } 794 795 static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 796 { 797 mutex_unlock(&chan->lock); 798 } 799 800 static inline void l2cap_set_timer(struct l2cap_chan *chan, 801 struct delayed_work *work, long timeout) 802 { 803 BT_DBG("chan %p state %s timeout %ld", chan, 804 state_to_string(chan->state), timeout); 805 806 /* If delayed work cancelled do not hold(chan) 807 since it is already done with previous set_timer */ 808 if (!cancel_delayed_work(work)) 809 l2cap_chan_hold(chan); 810 811 schedule_delayed_work(work, timeout); 812 } 813 814 static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 815 struct delayed_work *work) 816 { 817 bool ret; 818 819 /* put(chan) if delayed work cancelled otherwise it 820 is done in delayed work function */ 821 ret = cancel_delayed_work(work); 822 if (ret) 823 l2cap_chan_put(chan); 824 825 return ret; 826 } 827 828 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 829 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 830 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 831 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 832 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 833 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 834 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 835 836 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 837 { 838 if (seq1 >= seq2) 839 return seq1 - seq2; 840 else 841 return chan->tx_win_max + 1 - seq2 + seq1; 842 } 843 844 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 845 { 846 return (seq + 1) % (chan->tx_win_max + 1); 847 } 848 849 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 850 { 851 return NULL; 852 } 853 854 static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb) 855 { 856 return -ENOSYS; 857 } 858 859 static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan, 860 unsigned long hdr_len, 861 unsigned long len, int nb) 862 { 863 return ERR_PTR(-ENOSYS); 864 } 865 866 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 867 { 868 } 869 870 static inline void l2cap_chan_no_close(struct l2cap_chan *chan) 871 { 872 } 873 874 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 875 { 876 } 877 878 static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan, 879 int state, int err) 880 { 881 } 882 883 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) 884 { 885 } 886 887 static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan) 888 { 889 } 890 891 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) 892 { 893 } 894 895 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) 896 { 897 } 898 899 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) 900 { 901 return 0; 902 } 903 904 extern bool disable_ertm; 905 906 int l2cap_init_sockets(void); 907 void l2cap_cleanup_sockets(void); 908 bool l2cap_is_socket(struct socket *sock); 909 910 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan); 911 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 912 913 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 914 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 915 916 struct l2cap_chan *l2cap_chan_create(void); 917 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 918 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 919 bdaddr_t *dst, u8 dst_type); 920 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len); 921 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 922 int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator); 923 void l2cap_chan_set_defaults(struct l2cap_chan *chan); 924 int l2cap_ertm_init(struct l2cap_chan *chan); 925 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 926 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 927 void l2cap_chan_del(struct l2cap_chan *chan, int err); 928 void l2cap_send_conn_req(struct l2cap_chan *chan); 929 void l2cap_move_start(struct l2cap_chan *chan); 930 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, 931 u8 status); 932 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result); 933 934 struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn); 935 void l2cap_conn_put(struct l2cap_conn *conn); 936 937 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); 938 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); 939 940 #endif /* __L2CAP_H */ 941