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 144 145 /* L2CAP Control Field bit masks */ 146 #define L2CAP_CTRL_SAR 0xC000 147 #define L2CAP_CTRL_REQSEQ 0x3F00 148 #define L2CAP_CTRL_TXSEQ 0x007E 149 #define L2CAP_CTRL_SUPERVISE 0x000C 150 151 #define L2CAP_CTRL_RETRANS 0x0080 152 #define L2CAP_CTRL_FINAL 0x0080 153 #define L2CAP_CTRL_POLL 0x0010 154 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 155 156 #define L2CAP_CTRL_TXSEQ_SHIFT 1 157 #define L2CAP_CTRL_SUPER_SHIFT 2 158 #define L2CAP_CTRL_POLL_SHIFT 4 159 #define L2CAP_CTRL_FINAL_SHIFT 7 160 #define L2CAP_CTRL_REQSEQ_SHIFT 8 161 #define L2CAP_CTRL_SAR_SHIFT 14 162 163 /* L2CAP Extended Control Field bit mask */ 164 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 165 #define L2CAP_EXT_CTRL_SAR 0x00030000 166 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 167 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 168 169 #define L2CAP_EXT_CTRL_POLL 0x00040000 170 #define L2CAP_EXT_CTRL_FINAL 0x00000002 171 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 172 173 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1 174 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 175 #define L2CAP_EXT_CTRL_SAR_SHIFT 16 176 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 177 #define L2CAP_EXT_CTRL_POLL_SHIFT 18 178 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 179 180 /* L2CAP Supervisory Function */ 181 #define L2CAP_SUPER_RR 0x00 182 #define L2CAP_SUPER_REJ 0x01 183 #define L2CAP_SUPER_RNR 0x02 184 #define L2CAP_SUPER_SREJ 0x03 185 186 /* L2CAP Segmentation and Reassembly */ 187 #define L2CAP_SAR_UNSEGMENTED 0x00 188 #define L2CAP_SAR_START 0x01 189 #define L2CAP_SAR_END 0x02 190 #define L2CAP_SAR_CONTINUE 0x03 191 192 /* L2CAP Command rej. reasons */ 193 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 194 #define L2CAP_REJ_MTU_EXCEEDED 0x0001 195 #define L2CAP_REJ_INVALID_CID 0x0002 196 197 /* L2CAP structures */ 198 struct l2cap_hdr { 199 __le16 len; 200 __le16 cid; 201 } __packed; 202 #define L2CAP_HDR_SIZE 4 203 #define L2CAP_ENH_HDR_SIZE 6 204 #define L2CAP_EXT_HDR_SIZE 8 205 206 #define L2CAP_FCS_SIZE 2 207 #define L2CAP_SDULEN_SIZE 2 208 #define L2CAP_PSMLEN_SIZE 2 209 #define L2CAP_ENH_CTRL_SIZE 2 210 #define L2CAP_EXT_CTRL_SIZE 4 211 212 struct l2cap_cmd_hdr { 213 __u8 code; 214 __u8 ident; 215 __le16 len; 216 } __packed; 217 #define L2CAP_CMD_HDR_SIZE 4 218 219 struct l2cap_cmd_rej_unk { 220 __le16 reason; 221 } __packed; 222 223 struct l2cap_cmd_rej_mtu { 224 __le16 reason; 225 __le16 max_mtu; 226 } __packed; 227 228 struct l2cap_cmd_rej_cid { 229 __le16 reason; 230 __le16 scid; 231 __le16 dcid; 232 } __packed; 233 234 struct l2cap_conn_req { 235 __le16 psm; 236 __le16 scid; 237 } __packed; 238 239 struct l2cap_conn_rsp { 240 __le16 dcid; 241 __le16 scid; 242 __le16 result; 243 __le16 status; 244 } __packed; 245 246 /* protocol/service multiplexer (PSM) */ 247 #define L2CAP_PSM_SDP 0x0001 248 #define L2CAP_PSM_RFCOMM 0x0003 249 #define L2CAP_PSM_3DSP 0x0021 250 251 /* channel identifier */ 252 #define L2CAP_CID_SIGNALING 0x0001 253 #define L2CAP_CID_CONN_LESS 0x0002 254 #define L2CAP_CID_A2MP 0x0003 255 #define L2CAP_CID_ATT 0x0004 256 #define L2CAP_CID_LE_SIGNALING 0x0005 257 #define L2CAP_CID_SMP 0x0006 258 #define L2CAP_CID_DYN_START 0x0040 259 #define L2CAP_CID_DYN_END 0xffff 260 #define L2CAP_CID_LE_DYN_END 0x007f 261 262 /* connect/create channel results */ 263 #define L2CAP_CR_SUCCESS 0x0000 264 #define L2CAP_CR_PEND 0x0001 265 #define L2CAP_CR_BAD_PSM 0x0002 266 #define L2CAP_CR_SEC_BLOCK 0x0003 267 #define L2CAP_CR_NO_MEM 0x0004 268 #define L2CAP_CR_BAD_AMP 0x0005 269 #define L2CAP_CR_AUTHENTICATION 0x0005 270 #define L2CAP_CR_AUTHORIZATION 0x0006 271 #define L2CAP_CR_BAD_KEY_SIZE 0x0007 272 #define L2CAP_CR_ENCRYPTION 0x0008 273 274 /* connect/create channel status */ 275 #define L2CAP_CS_NO_INFO 0x0000 276 #define L2CAP_CS_AUTHEN_PEND 0x0001 277 #define L2CAP_CS_AUTHOR_PEND 0x0002 278 279 struct l2cap_conf_req { 280 __le16 dcid; 281 __le16 flags; 282 __u8 data[0]; 283 } __packed; 284 285 struct l2cap_conf_rsp { 286 __le16 scid; 287 __le16 flags; 288 __le16 result; 289 __u8 data[0]; 290 } __packed; 291 292 #define L2CAP_CONF_SUCCESS 0x0000 293 #define L2CAP_CONF_UNACCEPT 0x0001 294 #define L2CAP_CONF_REJECT 0x0002 295 #define L2CAP_CONF_UNKNOWN 0x0003 296 #define L2CAP_CONF_PENDING 0x0004 297 #define L2CAP_CONF_EFS_REJECT 0x0005 298 299 /* configuration req/rsp continuation flag */ 300 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 301 302 struct l2cap_conf_opt { 303 __u8 type; 304 __u8 len; 305 __u8 val[0]; 306 } __packed; 307 #define L2CAP_CONF_OPT_SIZE 2 308 309 #define L2CAP_CONF_HINT 0x80 310 #define L2CAP_CONF_MASK 0x7f 311 312 #define L2CAP_CONF_MTU 0x01 313 #define L2CAP_CONF_FLUSH_TO 0x02 314 #define L2CAP_CONF_QOS 0x03 315 #define L2CAP_CONF_RFC 0x04 316 #define L2CAP_CONF_FCS 0x05 317 #define L2CAP_CONF_EFS 0x06 318 #define L2CAP_CONF_EWS 0x07 319 320 #define L2CAP_CONF_MAX_SIZE 22 321 322 struct l2cap_conf_rfc { 323 __u8 mode; 324 __u8 txwin_size; 325 __u8 max_transmit; 326 __le16 retrans_timeout; 327 __le16 monitor_timeout; 328 __le16 max_pdu_size; 329 } __packed; 330 331 #define L2CAP_MODE_BASIC 0x00 332 #define L2CAP_MODE_RETRANS 0x01 333 #define L2CAP_MODE_FLOWCTL 0x02 334 #define L2CAP_MODE_ERTM 0x03 335 #define L2CAP_MODE_STREAMING 0x04 336 337 /* Unlike the above this one doesn't actually map to anything that would 338 * ever be sent over the air. Therefore, use a value that's unlikely to 339 * ever be used in the BR/EDR configuration phase. 340 */ 341 #define L2CAP_MODE_LE_FLOWCTL 0x80 342 343 struct l2cap_conf_efs { 344 __u8 id; 345 __u8 stype; 346 __le16 msdu; 347 __le32 sdu_itime; 348 __le32 acc_lat; 349 __le32 flush_to; 350 } __packed; 351 352 #define L2CAP_SERV_NOTRAFIC 0x00 353 #define L2CAP_SERV_BESTEFFORT 0x01 354 #define L2CAP_SERV_GUARANTEED 0x02 355 356 #define L2CAP_BESTEFFORT_ID 0x01 357 358 struct l2cap_disconn_req { 359 __le16 dcid; 360 __le16 scid; 361 } __packed; 362 363 struct l2cap_disconn_rsp { 364 __le16 dcid; 365 __le16 scid; 366 } __packed; 367 368 struct l2cap_info_req { 369 __le16 type; 370 } __packed; 371 372 struct l2cap_info_rsp { 373 __le16 type; 374 __le16 result; 375 __u8 data[0]; 376 } __packed; 377 378 struct l2cap_create_chan_req { 379 __le16 psm; 380 __le16 scid; 381 __u8 amp_id; 382 } __packed; 383 384 struct l2cap_create_chan_rsp { 385 __le16 dcid; 386 __le16 scid; 387 __le16 result; 388 __le16 status; 389 } __packed; 390 391 struct l2cap_move_chan_req { 392 __le16 icid; 393 __u8 dest_amp_id; 394 } __packed; 395 396 struct l2cap_move_chan_rsp { 397 __le16 icid; 398 __le16 result; 399 } __packed; 400 401 #define L2CAP_MR_SUCCESS 0x0000 402 #define L2CAP_MR_PEND 0x0001 403 #define L2CAP_MR_BAD_ID 0x0002 404 #define L2CAP_MR_SAME_ID 0x0003 405 #define L2CAP_MR_NOT_SUPP 0x0004 406 #define L2CAP_MR_COLLISION 0x0005 407 #define L2CAP_MR_NOT_ALLOWED 0x0006 408 409 struct l2cap_move_chan_cfm { 410 __le16 icid; 411 __le16 result; 412 } __packed; 413 414 #define L2CAP_MC_CONFIRMED 0x0000 415 #define L2CAP_MC_UNCONFIRMED 0x0001 416 417 struct l2cap_move_chan_cfm_rsp { 418 __le16 icid; 419 } __packed; 420 421 /* info type */ 422 #define L2CAP_IT_CL_MTU 0x0001 423 #define L2CAP_IT_FEAT_MASK 0x0002 424 #define L2CAP_IT_FIXED_CHAN 0x0003 425 426 /* info result */ 427 #define L2CAP_IR_SUCCESS 0x0000 428 #define L2CAP_IR_NOTSUPP 0x0001 429 430 struct l2cap_conn_param_update_req { 431 __le16 min; 432 __le16 max; 433 __le16 latency; 434 __le16 to_multiplier; 435 } __packed; 436 437 struct l2cap_conn_param_update_rsp { 438 __le16 result; 439 } __packed; 440 441 /* Connection Parameters result */ 442 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 443 #define L2CAP_CONN_PARAM_REJECTED 0x0001 444 445 #define L2CAP_LE_MAX_CREDITS 10 446 #define L2CAP_LE_DEFAULT_MPS 230 447 448 struct l2cap_le_conn_req { 449 __le16 psm; 450 __le16 scid; 451 __le16 mtu; 452 __le16 mps; 453 __le16 credits; 454 } __packed; 455 456 struct l2cap_le_conn_rsp { 457 __le16 dcid; 458 __le16 mtu; 459 __le16 mps; 460 __le16 credits; 461 __le16 result; 462 } __packed; 463 464 struct l2cap_le_credits { 465 __le16 cid; 466 __le16 credits; 467 } __packed; 468 469 /* ----- L2CAP channels and connections ----- */ 470 struct l2cap_seq_list { 471 __u16 head; 472 __u16 tail; 473 __u16 mask; 474 __u16 *list; 475 }; 476 477 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF 478 #define L2CAP_SEQ_LIST_TAIL 0x8000 479 480 struct l2cap_chan { 481 struct l2cap_conn *conn; 482 struct hci_conn *hs_hcon; 483 struct hci_chan *hs_hchan; 484 struct kref kref; 485 atomic_t nesting; 486 487 __u8 state; 488 489 bdaddr_t dst; 490 __u8 dst_type; 491 bdaddr_t src; 492 __u8 src_type; 493 __le16 psm; 494 __le16 sport; 495 __u16 dcid; 496 __u16 scid; 497 498 __u16 imtu; 499 __u16 omtu; 500 __u16 flush_to; 501 __u8 mode; 502 __u8 chan_type; 503 __u8 chan_policy; 504 505 __u8 sec_level; 506 507 __u8 ident; 508 509 __u8 conf_req[64]; 510 __u8 conf_len; 511 __u8 num_conf_req; 512 __u8 num_conf_rsp; 513 514 __u8 fcs; 515 516 __u16 tx_win; 517 __u16 tx_win_max; 518 __u16 ack_win; 519 __u8 max_tx; 520 __u16 retrans_timeout; 521 __u16 monitor_timeout; 522 __u16 mps; 523 524 __u16 tx_credits; 525 __u16 rx_credits; 526 527 __u8 tx_state; 528 __u8 rx_state; 529 530 unsigned long conf_state; 531 unsigned long conn_state; 532 unsigned long flags; 533 534 __u8 remote_amp_id; 535 __u8 local_amp_id; 536 __u8 move_id; 537 __u8 move_state; 538 __u8 move_role; 539 540 __u16 next_tx_seq; 541 __u16 expected_ack_seq; 542 __u16 expected_tx_seq; 543 __u16 buffer_seq; 544 __u16 srej_save_reqseq; 545 __u16 last_acked_seq; 546 __u16 frames_sent; 547 __u16 unacked_frames; 548 __u8 retry_count; 549 __u16 sdu_len; 550 struct sk_buff *sdu; 551 struct sk_buff *sdu_last_frag; 552 553 __u16 remote_tx_win; 554 __u8 remote_max_tx; 555 __u16 remote_mps; 556 557 __u8 local_id; 558 __u8 local_stype; 559 __u16 local_msdu; 560 __u32 local_sdu_itime; 561 __u32 local_acc_lat; 562 __u32 local_flush_to; 563 564 __u8 remote_id; 565 __u8 remote_stype; 566 __u16 remote_msdu; 567 __u32 remote_sdu_itime; 568 __u32 remote_acc_lat; 569 __u32 remote_flush_to; 570 571 struct delayed_work chan_timer; 572 struct delayed_work retrans_timer; 573 struct delayed_work monitor_timer; 574 struct delayed_work ack_timer; 575 576 struct sk_buff *tx_send_head; 577 struct sk_buff_head tx_q; 578 struct sk_buff_head srej_q; 579 struct l2cap_seq_list srej_list; 580 struct l2cap_seq_list retrans_list; 581 582 struct list_head list; 583 struct list_head global_l; 584 585 void *data; 586 const struct l2cap_ops *ops; 587 struct mutex lock; 588 }; 589 590 struct l2cap_ops { 591 char *name; 592 593 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 594 int (*recv) (struct l2cap_chan * chan, 595 struct sk_buff *skb); 596 void (*teardown) (struct l2cap_chan *chan, int err); 597 void (*close) (struct l2cap_chan *chan); 598 void (*state_change) (struct l2cap_chan *chan, 599 int state, int err); 600 void (*ready) (struct l2cap_chan *chan); 601 void (*defer) (struct l2cap_chan *chan); 602 void (*resume) (struct l2cap_chan *chan); 603 void (*suspend) (struct l2cap_chan *chan); 604 void (*set_shutdown) (struct l2cap_chan *chan); 605 long (*get_sndtimeo) (struct l2cap_chan *chan); 606 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 607 unsigned long hdr_len, 608 unsigned long len, int nb); 609 int (*memcpy_fromiovec) (struct l2cap_chan *chan, 610 unsigned char *kdata, 611 struct msghdr *msg, 612 int len); 613 }; 614 615 struct l2cap_conn { 616 struct hci_conn *hcon; 617 struct hci_chan *hchan; 618 619 unsigned int mtu; 620 621 __u32 feat_mask; 622 __u8 fixed_chan_mask; 623 bool hs_enabled; 624 625 __u8 info_state; 626 __u8 info_ident; 627 628 struct delayed_work info_timer; 629 630 struct sk_buff *rx_skb; 631 __u32 rx_len; 632 __u8 tx_ident; 633 struct mutex ident_lock; 634 635 struct sk_buff_head pending_rx; 636 struct work_struct pending_rx_work; 637 638 struct work_struct id_addr_update_work; 639 640 __u8 disc_reason; 641 642 struct l2cap_chan *smp; 643 644 struct list_head chan_l; 645 struct mutex chan_lock; 646 struct kref ref; 647 struct list_head users; 648 }; 649 650 struct l2cap_user { 651 struct list_head list; 652 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); 653 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); 654 }; 655 656 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 657 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 658 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 659 660 #define L2CAP_CHAN_RAW 1 661 #define L2CAP_CHAN_CONN_LESS 2 662 #define L2CAP_CHAN_CONN_ORIENTED 3 663 #define L2CAP_CHAN_FIXED 4 664 665 /* ----- L2CAP socket info ----- */ 666 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 667 668 struct l2cap_pinfo { 669 struct bt_sock bt; 670 struct l2cap_chan *chan; 671 struct sk_buff *rx_busy_skb; 672 }; 673 674 enum { 675 CONF_REQ_SENT, 676 CONF_INPUT_DONE, 677 CONF_OUTPUT_DONE, 678 CONF_MTU_DONE, 679 CONF_MODE_DONE, 680 CONF_CONNECT_PEND, 681 CONF_RECV_NO_FCS, 682 CONF_STATE2_DEVICE, 683 CONF_EWS_RECV, 684 CONF_LOC_CONF_PEND, 685 CONF_REM_CONF_PEND, 686 CONF_NOT_COMPLETE, 687 }; 688 689 #define L2CAP_CONF_MAX_CONF_REQ 2 690 #define L2CAP_CONF_MAX_CONF_RSP 2 691 692 enum { 693 CONN_SREJ_SENT, 694 CONN_WAIT_F, 695 CONN_SREJ_ACT, 696 CONN_SEND_PBIT, 697 CONN_REMOTE_BUSY, 698 CONN_LOCAL_BUSY, 699 CONN_REJ_ACT, 700 CONN_SEND_FBIT, 701 CONN_RNR_SENT, 702 }; 703 704 /* Definitions for flags in l2cap_chan */ 705 enum { 706 FLAG_ROLE_SWITCH, 707 FLAG_FORCE_ACTIVE, 708 FLAG_FORCE_RELIABLE, 709 FLAG_FLUSHABLE, 710 FLAG_EXT_CTRL, 711 FLAG_EFS_ENABLE, 712 FLAG_DEFER_SETUP, 713 FLAG_LE_CONN_REQ_SENT, 714 FLAG_PENDING_SECURITY, 715 FLAG_HOLD_HCI_CONN, 716 }; 717 718 /* Lock nesting levels for L2CAP channels. We need these because lockdep 719 * otherwise considers all channels equal and will e.g. complain about a 720 * connection oriented channel triggering SMP procedures or a listening 721 * channel creating and locking a child channel. 722 */ 723 enum { 724 L2CAP_NESTING_SMP, 725 L2CAP_NESTING_NORMAL, 726 L2CAP_NESTING_PARENT, 727 }; 728 729 enum { 730 L2CAP_TX_STATE_XMIT, 731 L2CAP_TX_STATE_WAIT_F, 732 }; 733 734 enum { 735 L2CAP_RX_STATE_RECV, 736 L2CAP_RX_STATE_SREJ_SENT, 737 L2CAP_RX_STATE_MOVE, 738 L2CAP_RX_STATE_WAIT_P, 739 L2CAP_RX_STATE_WAIT_F, 740 }; 741 742 enum { 743 L2CAP_TXSEQ_EXPECTED, 744 L2CAP_TXSEQ_EXPECTED_SREJ, 745 L2CAP_TXSEQ_UNEXPECTED, 746 L2CAP_TXSEQ_UNEXPECTED_SREJ, 747 L2CAP_TXSEQ_DUPLICATE, 748 L2CAP_TXSEQ_DUPLICATE_SREJ, 749 L2CAP_TXSEQ_INVALID, 750 L2CAP_TXSEQ_INVALID_IGNORE, 751 }; 752 753 enum { 754 L2CAP_EV_DATA_REQUEST, 755 L2CAP_EV_LOCAL_BUSY_DETECTED, 756 L2CAP_EV_LOCAL_BUSY_CLEAR, 757 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 758 L2CAP_EV_RECV_FBIT, 759 L2CAP_EV_RETRANS_TO, 760 L2CAP_EV_MONITOR_TO, 761 L2CAP_EV_EXPLICIT_POLL, 762 L2CAP_EV_RECV_IFRAME, 763 L2CAP_EV_RECV_RR, 764 L2CAP_EV_RECV_REJ, 765 L2CAP_EV_RECV_RNR, 766 L2CAP_EV_RECV_SREJ, 767 L2CAP_EV_RECV_FRAME, 768 }; 769 770 enum { 771 L2CAP_MOVE_ROLE_NONE, 772 L2CAP_MOVE_ROLE_INITIATOR, 773 L2CAP_MOVE_ROLE_RESPONDER, 774 }; 775 776 enum { 777 L2CAP_MOVE_STABLE, 778 L2CAP_MOVE_WAIT_REQ, 779 L2CAP_MOVE_WAIT_RSP, 780 L2CAP_MOVE_WAIT_RSP_SUCCESS, 781 L2CAP_MOVE_WAIT_CONFIRM, 782 L2CAP_MOVE_WAIT_CONFIRM_RSP, 783 L2CAP_MOVE_WAIT_LOGICAL_COMP, 784 L2CAP_MOVE_WAIT_LOGICAL_CFM, 785 L2CAP_MOVE_WAIT_LOCAL_BUSY, 786 L2CAP_MOVE_WAIT_PREPARE, 787 }; 788 789 void l2cap_chan_hold(struct l2cap_chan *c); 790 void l2cap_chan_put(struct l2cap_chan *c); 791 792 static inline void l2cap_chan_lock(struct l2cap_chan *chan) 793 { 794 mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting)); 795 } 796 797 static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 798 { 799 mutex_unlock(&chan->lock); 800 } 801 802 static inline void l2cap_set_timer(struct l2cap_chan *chan, 803 struct delayed_work *work, long timeout) 804 { 805 BT_DBG("chan %p state %s timeout %ld", chan, 806 state_to_string(chan->state), timeout); 807 808 /* If delayed work cancelled do not hold(chan) 809 since it is already done with previous set_timer */ 810 if (!cancel_delayed_work(work)) 811 l2cap_chan_hold(chan); 812 813 schedule_delayed_work(work, timeout); 814 } 815 816 static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 817 struct delayed_work *work) 818 { 819 bool ret; 820 821 /* put(chan) if delayed work cancelled otherwise it 822 is done in delayed work function */ 823 ret = cancel_delayed_work(work); 824 if (ret) 825 l2cap_chan_put(chan); 826 827 return ret; 828 } 829 830 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 831 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 832 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 833 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 834 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 835 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 836 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 837 838 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 839 { 840 if (seq1 >= seq2) 841 return seq1 - seq2; 842 else 843 return chan->tx_win_max + 1 - seq2 + seq1; 844 } 845 846 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 847 { 848 return (seq + 1) % (chan->tx_win_max + 1); 849 } 850 851 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 852 { 853 return NULL; 854 } 855 856 static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb) 857 { 858 return -ENOSYS; 859 } 860 861 static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan, 862 unsigned long hdr_len, 863 unsigned long len, int nb) 864 { 865 return ERR_PTR(-ENOSYS); 866 } 867 868 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 869 { 870 } 871 872 static inline void l2cap_chan_no_close(struct l2cap_chan *chan) 873 { 874 } 875 876 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 877 { 878 } 879 880 static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan, 881 int state, int err) 882 { 883 } 884 885 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) 886 { 887 } 888 889 static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan) 890 { 891 } 892 893 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) 894 { 895 } 896 897 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) 898 { 899 } 900 901 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) 902 { 903 return 0; 904 } 905 906 static inline int l2cap_chan_no_memcpy_fromiovec(struct l2cap_chan *chan, 907 unsigned char *kdata, 908 struct msghdr *msg, 909 int len) 910 { 911 /* Following is safe since for compiler definitions of kvec and 912 * iovec are identical, yielding the same in-core layout and alignment 913 */ 914 struct kvec *vec = (struct kvec *)msg->msg_iter.iov; 915 916 while (len > 0) { 917 if (vec->iov_len) { 918 int copy = min_t(unsigned int, len, vec->iov_len); 919 memcpy(kdata, vec->iov_base, copy); 920 len -= copy; 921 kdata += copy; 922 vec->iov_base += copy; 923 vec->iov_len -= copy; 924 } 925 vec++; 926 } 927 928 return 0; 929 } 930 931 extern bool disable_ertm; 932 933 int l2cap_init_sockets(void); 934 void l2cap_cleanup_sockets(void); 935 bool l2cap_is_socket(struct socket *sock); 936 937 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan); 938 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 939 940 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 941 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 942 943 struct l2cap_chan *l2cap_chan_create(void); 944 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 945 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 946 bdaddr_t *dst, u8 dst_type); 947 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len); 948 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 949 int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator); 950 void l2cap_chan_set_defaults(struct l2cap_chan *chan); 951 int l2cap_ertm_init(struct l2cap_chan *chan); 952 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 953 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 954 void l2cap_chan_del(struct l2cap_chan *chan, int err); 955 void l2cap_send_conn_req(struct l2cap_chan *chan); 956 void l2cap_move_start(struct l2cap_chan *chan); 957 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, 958 u8 status); 959 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result); 960 961 struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn); 962 void l2cap_conn_put(struct l2cap_conn *conn); 963 964 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); 965 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); 966 967 #endif /* __L2CAP_H */ 968