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 32 /* L2CAP defaults */ 33 #define L2CAP_DEFAULT_MTU 672 34 #define L2CAP_DEFAULT_MIN_MTU 48 35 #define L2CAP_DEFAULT_FLUSH_TO 0xffff 36 #define L2CAP_DEFAULT_TX_WINDOW 63 37 #define L2CAP_DEFAULT_EXT_WINDOW 0x3FFF 38 #define L2CAP_DEFAULT_MAX_TX 3 39 #define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */ 40 #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */ 41 #define L2CAP_DEFAULT_MAX_PDU_SIZE 1009 /* Sized for 3-DH5 packet */ 42 #define L2CAP_DEFAULT_ACK_TO 200 43 #define L2CAP_LE_DEFAULT_MTU 23 44 #define L2CAP_DEFAULT_MAX_SDU_SIZE 0xFFFF 45 #define L2CAP_DEFAULT_SDU_ITIME 0xFFFFFFFF 46 #define L2CAP_DEFAULT_ACC_LAT 0xFFFFFFFF 47 48 #define L2CAP_DISC_TIMEOUT (100) 49 #define L2CAP_DISC_REJ_TIMEOUT (5000) /* 5 seconds */ 50 #define L2CAP_ENC_TIMEOUT (5000) /* 5 seconds */ 51 #define L2CAP_CONN_TIMEOUT (40000) /* 40 seconds */ 52 #define L2CAP_INFO_TIMEOUT (4000) /* 4 seconds */ 53 54 /* L2CAP socket address */ 55 struct sockaddr_l2 { 56 sa_family_t l2_family; 57 __le16 l2_psm; 58 bdaddr_t l2_bdaddr; 59 __le16 l2_cid; 60 }; 61 62 /* L2CAP socket options */ 63 #define L2CAP_OPTIONS 0x01 64 struct l2cap_options { 65 __u16 omtu; 66 __u16 imtu; 67 __u16 flush_to; 68 __u8 mode; 69 __u8 fcs; 70 __u8 max_tx; 71 __u16 txwin_size; 72 }; 73 74 #define L2CAP_CONNINFO 0x02 75 struct l2cap_conninfo { 76 __u16 hci_handle; 77 __u8 dev_class[3]; 78 }; 79 80 #define L2CAP_LM 0x03 81 #define L2CAP_LM_MASTER 0x0001 82 #define L2CAP_LM_AUTH 0x0002 83 #define L2CAP_LM_ENCRYPT 0x0004 84 #define L2CAP_LM_TRUSTED 0x0008 85 #define L2CAP_LM_RELIABLE 0x0010 86 #define L2CAP_LM_SECURE 0x0020 87 88 /* L2CAP command codes */ 89 #define L2CAP_COMMAND_REJ 0x01 90 #define L2CAP_CONN_REQ 0x02 91 #define L2CAP_CONN_RSP 0x03 92 #define L2CAP_CONF_REQ 0x04 93 #define L2CAP_CONF_RSP 0x05 94 #define L2CAP_DISCONN_REQ 0x06 95 #define L2CAP_DISCONN_RSP 0x07 96 #define L2CAP_ECHO_REQ 0x08 97 #define L2CAP_ECHO_RSP 0x09 98 #define L2CAP_INFO_REQ 0x0a 99 #define L2CAP_INFO_RSP 0x0b 100 #define L2CAP_CREATE_CHAN_REQ 0x0c 101 #define L2CAP_CREATE_CHAN_RSP 0x0d 102 #define L2CAP_MOVE_CHAN_REQ 0x0e 103 #define L2CAP_MOVE_CHAN_RSP 0x0f 104 #define L2CAP_MOVE_CHAN_CFM 0x10 105 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11 106 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12 107 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13 108 109 /* L2CAP extended feature mask */ 110 #define L2CAP_FEAT_FLOWCTL 0x00000001 111 #define L2CAP_FEAT_RETRANS 0x00000002 112 #define L2CAP_FEAT_BIDIR_QOS 0x00000004 113 #define L2CAP_FEAT_ERTM 0x00000008 114 #define L2CAP_FEAT_STREAMING 0x00000010 115 #define L2CAP_FEAT_FCS 0x00000020 116 #define L2CAP_FEAT_EXT_FLOW 0x00000040 117 #define L2CAP_FEAT_FIXED_CHAN 0x00000080 118 #define L2CAP_FEAT_EXT_WINDOW 0x00000100 119 #define L2CAP_FEAT_UCD 0x00000200 120 121 /* L2CAP checksum option */ 122 #define L2CAP_FCS_NONE 0x00 123 #define L2CAP_FCS_CRC16 0x01 124 125 /* L2CAP fixed channels */ 126 #define L2CAP_FC_L2CAP 0x02 127 #define L2CAP_FC_A2MP 0x08 128 129 /* L2CAP Control Field bit masks */ 130 #define L2CAP_CTRL_SAR 0xC000 131 #define L2CAP_CTRL_REQSEQ 0x3F00 132 #define L2CAP_CTRL_TXSEQ 0x007E 133 #define L2CAP_CTRL_SUPERVISE 0x000C 134 135 #define L2CAP_CTRL_RETRANS 0x0080 136 #define L2CAP_CTRL_FINAL 0x0080 137 #define L2CAP_CTRL_POLL 0x0010 138 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 139 140 #define L2CAP_CTRL_TXSEQ_SHIFT 1 141 #define L2CAP_CTRL_SUPER_SHIFT 2 142 #define L2CAP_CTRL_REQSEQ_SHIFT 8 143 #define L2CAP_CTRL_SAR_SHIFT 14 144 145 /* L2CAP Extended Control Field bit mask */ 146 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 147 #define L2CAP_EXT_CTRL_SAR 0x00030000 148 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 149 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 150 151 #define L2CAP_EXT_CTRL_POLL 0x00040000 152 #define L2CAP_EXT_CTRL_FINAL 0x00000002 153 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 154 155 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 156 #define L2CAP_EXT_CTRL_SAR_SHIFT 16 157 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 158 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 159 160 /* L2CAP Supervisory Function */ 161 #define L2CAP_SUPER_RR 0x00 162 #define L2CAP_SUPER_REJ 0x01 163 #define L2CAP_SUPER_RNR 0x02 164 #define L2CAP_SUPER_SREJ 0x03 165 166 /* L2CAP Segmentation and Reassembly */ 167 #define L2CAP_SAR_UNSEGMENTED 0x00 168 #define L2CAP_SAR_START 0x01 169 #define L2CAP_SAR_END 0x02 170 #define L2CAP_SAR_CONTINUE 0x03 171 172 /* L2CAP Command rej. reasons */ 173 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 174 #define L2CAP_REJ_MTU_EXCEEDED 0x0001 175 #define L2CAP_REJ_INVALID_CID 0x0002 176 177 /* L2CAP structures */ 178 struct l2cap_hdr { 179 __le16 len; 180 __le16 cid; 181 } __packed; 182 #define L2CAP_HDR_SIZE 4 183 #define L2CAP_ENH_HDR_SIZE 6 184 #define L2CAP_EXT_HDR_SIZE 8 185 186 #define L2CAP_FCS_SIZE 2 187 #define L2CAP_SDULEN_SIZE 2 188 #define L2CAP_PSMLEN_SIZE 2 189 190 struct l2cap_cmd_hdr { 191 __u8 code; 192 __u8 ident; 193 __le16 len; 194 } __packed; 195 #define L2CAP_CMD_HDR_SIZE 4 196 197 struct l2cap_cmd_rej_unk { 198 __le16 reason; 199 } __packed; 200 201 struct l2cap_cmd_rej_mtu { 202 __le16 reason; 203 __le16 max_mtu; 204 } __packed; 205 206 struct l2cap_cmd_rej_cid { 207 __le16 reason; 208 __le16 scid; 209 __le16 dcid; 210 } __packed; 211 212 struct l2cap_conn_req { 213 __le16 psm; 214 __le16 scid; 215 } __packed; 216 217 struct l2cap_conn_rsp { 218 __le16 dcid; 219 __le16 scid; 220 __le16 result; 221 __le16 status; 222 } __packed; 223 224 /* channel indentifier */ 225 #define L2CAP_CID_SIGNALING 0x0001 226 #define L2CAP_CID_CONN_LESS 0x0002 227 #define L2CAP_CID_LE_DATA 0x0004 228 #define L2CAP_CID_LE_SIGNALING 0x0005 229 #define L2CAP_CID_SMP 0x0006 230 #define L2CAP_CID_DYN_START 0x0040 231 #define L2CAP_CID_DYN_END 0xffff 232 233 /* connect/create channel results */ 234 #define L2CAP_CR_SUCCESS 0x0000 235 #define L2CAP_CR_PEND 0x0001 236 #define L2CAP_CR_BAD_PSM 0x0002 237 #define L2CAP_CR_SEC_BLOCK 0x0003 238 #define L2CAP_CR_NO_MEM 0x0004 239 #define L2CAP_CR_BAD_AMP 0x0005 240 241 /* connect/create channel status */ 242 #define L2CAP_CS_NO_INFO 0x0000 243 #define L2CAP_CS_AUTHEN_PEND 0x0001 244 #define L2CAP_CS_AUTHOR_PEND 0x0002 245 246 struct l2cap_conf_req { 247 __le16 dcid; 248 __le16 flags; 249 __u8 data[0]; 250 } __packed; 251 252 struct l2cap_conf_rsp { 253 __le16 scid; 254 __le16 flags; 255 __le16 result; 256 __u8 data[0]; 257 } __packed; 258 259 #define L2CAP_CONF_SUCCESS 0x0000 260 #define L2CAP_CONF_UNACCEPT 0x0001 261 #define L2CAP_CONF_REJECT 0x0002 262 #define L2CAP_CONF_UNKNOWN 0x0003 263 #define L2CAP_CONF_PENDING 0x0004 264 #define L2CAP_CONF_EFS_REJECT 0x0005 265 266 struct l2cap_conf_opt { 267 __u8 type; 268 __u8 len; 269 __u8 val[0]; 270 } __packed; 271 #define L2CAP_CONF_OPT_SIZE 2 272 273 #define L2CAP_CONF_HINT 0x80 274 #define L2CAP_CONF_MASK 0x7f 275 276 #define L2CAP_CONF_MTU 0x01 277 #define L2CAP_CONF_FLUSH_TO 0x02 278 #define L2CAP_CONF_QOS 0x03 279 #define L2CAP_CONF_RFC 0x04 280 #define L2CAP_CONF_FCS 0x05 281 #define L2CAP_CONF_EFS 0x06 282 #define L2CAP_CONF_EWS 0x07 283 284 #define L2CAP_CONF_MAX_SIZE 22 285 286 struct l2cap_conf_rfc { 287 __u8 mode; 288 __u8 txwin_size; 289 __u8 max_transmit; 290 __le16 retrans_timeout; 291 __le16 monitor_timeout; 292 __le16 max_pdu_size; 293 } __packed; 294 295 #define L2CAP_MODE_BASIC 0x00 296 #define L2CAP_MODE_RETRANS 0x01 297 #define L2CAP_MODE_FLOWCTL 0x02 298 #define L2CAP_MODE_ERTM 0x03 299 #define L2CAP_MODE_STREAMING 0x04 300 301 struct l2cap_conf_efs { 302 __u8 id; 303 __u8 stype; 304 __le16 msdu; 305 __le32 sdu_itime; 306 __le32 acc_lat; 307 __le32 flush_to; 308 } __packed; 309 310 #define L2CAP_SERV_NOTRAFIC 0x00 311 #define L2CAP_SERV_BESTEFFORT 0x01 312 #define L2CAP_SERV_GUARANTEED 0x02 313 314 #define L2CAP_BESTEFFORT_ID 0x01 315 316 struct l2cap_disconn_req { 317 __le16 dcid; 318 __le16 scid; 319 } __packed; 320 321 struct l2cap_disconn_rsp { 322 __le16 dcid; 323 __le16 scid; 324 } __packed; 325 326 struct l2cap_info_req { 327 __le16 type; 328 } __packed; 329 330 struct l2cap_info_rsp { 331 __le16 type; 332 __le16 result; 333 __u8 data[0]; 334 } __packed; 335 336 struct l2cap_create_chan_req { 337 __le16 psm; 338 __le16 scid; 339 __u8 amp_id; 340 } __packed; 341 342 struct l2cap_create_chan_rsp { 343 __le16 dcid; 344 __le16 scid; 345 __le16 result; 346 __le16 status; 347 } __packed; 348 349 struct l2cap_move_chan_req { 350 __le16 icid; 351 __u8 dest_amp_id; 352 } __packed; 353 354 struct l2cap_move_chan_rsp { 355 __le16 icid; 356 __le16 result; 357 } __packed; 358 359 #define L2CAP_MR_SUCCESS 0x0000 360 #define L2CAP_MR_PEND 0x0001 361 #define L2CAP_MR_BAD_ID 0x0002 362 #define L2CAP_MR_SAME_ID 0x0003 363 #define L2CAP_MR_NOT_SUPP 0x0004 364 #define L2CAP_MR_COLLISION 0x0005 365 #define L2CAP_MR_NOT_ALLOWED 0x0006 366 367 struct l2cap_move_chan_cfm { 368 __le16 icid; 369 __le16 result; 370 } __packed; 371 372 #define L2CAP_MC_CONFIRMED 0x0000 373 #define L2CAP_MC_UNCONFIRMED 0x0001 374 375 struct l2cap_move_chan_cfm_rsp { 376 __le16 icid; 377 } __packed; 378 379 /* info type */ 380 #define L2CAP_IT_CL_MTU 0x0001 381 #define L2CAP_IT_FEAT_MASK 0x0002 382 #define L2CAP_IT_FIXED_CHAN 0x0003 383 384 /* info result */ 385 #define L2CAP_IR_SUCCESS 0x0000 386 #define L2CAP_IR_NOTSUPP 0x0001 387 388 struct l2cap_conn_param_update_req { 389 __le16 min; 390 __le16 max; 391 __le16 latency; 392 __le16 to_multiplier; 393 } __packed; 394 395 struct l2cap_conn_param_update_rsp { 396 __le16 result; 397 } __packed; 398 399 /* Connection Parameters result */ 400 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 401 #define L2CAP_CONN_PARAM_REJECTED 0x0001 402 403 /* ----- L2CAP channels and connections ----- */ 404 struct srej_list { 405 __u16 tx_seq; 406 struct list_head list; 407 }; 408 409 struct l2cap_chan { 410 struct sock *sk; 411 412 struct l2cap_conn *conn; 413 414 __u8 state; 415 416 atomic_t refcnt; 417 418 __le16 psm; 419 __u16 dcid; 420 __u16 scid; 421 422 __u16 imtu; 423 __u16 omtu; 424 __u16 flush_to; 425 __u8 mode; 426 __u8 chan_type; 427 __u8 chan_policy; 428 429 __le16 sport; 430 431 __u8 sec_level; 432 433 __u8 ident; 434 435 __u8 conf_req[64]; 436 __u8 conf_len; 437 __u8 num_conf_req; 438 __u8 num_conf_rsp; 439 440 __u8 fcs; 441 442 __u16 tx_win; 443 __u16 tx_win_max; 444 __u8 max_tx; 445 __u16 retrans_timeout; 446 __u16 monitor_timeout; 447 __u16 mps; 448 449 unsigned long conf_state; 450 unsigned long conn_state; 451 unsigned long flags; 452 453 __u16 next_tx_seq; 454 __u16 expected_ack_seq; 455 __u16 expected_tx_seq; 456 __u16 buffer_seq; 457 __u16 buffer_seq_srej; 458 __u16 srej_save_reqseq; 459 __u16 frames_sent; 460 __u16 unacked_frames; 461 __u8 retry_count; 462 __u8 num_acked; 463 __u16 sdu_len; 464 struct sk_buff *sdu; 465 struct sk_buff *sdu_last_frag; 466 467 __u16 remote_tx_win; 468 __u8 remote_max_tx; 469 __u16 remote_mps; 470 471 __u8 local_id; 472 __u8 local_stype; 473 __u16 local_msdu; 474 __u32 local_sdu_itime; 475 __u32 local_acc_lat; 476 __u32 local_flush_to; 477 478 __u8 remote_id; 479 __u8 remote_stype; 480 __u16 remote_msdu; 481 __u32 remote_sdu_itime; 482 __u32 remote_acc_lat; 483 __u32 remote_flush_to; 484 485 struct delayed_work chan_timer; 486 struct delayed_work retrans_timer; 487 struct delayed_work monitor_timer; 488 struct delayed_work ack_timer; 489 490 struct sk_buff *tx_send_head; 491 struct sk_buff_head tx_q; 492 struct sk_buff_head srej_q; 493 struct list_head srej_l; 494 495 struct list_head list; 496 struct list_head global_l; 497 498 void *data; 499 struct l2cap_ops *ops; 500 }; 501 502 struct l2cap_ops { 503 char *name; 504 505 struct l2cap_chan *(*new_connection) (void *data); 506 int (*recv) (void *data, struct sk_buff *skb); 507 void (*close) (void *data); 508 void (*state_change) (void *data, int state); 509 }; 510 511 struct l2cap_conn { 512 struct hci_conn *hcon; 513 struct hci_chan *hchan; 514 515 bdaddr_t *dst; 516 bdaddr_t *src; 517 518 unsigned int mtu; 519 520 __u32 feat_mask; 521 522 __u8 info_state; 523 __u8 info_ident; 524 525 struct delayed_work info_timer; 526 527 spinlock_t lock; 528 529 struct sk_buff *rx_skb; 530 __u32 rx_len; 531 __u8 tx_ident; 532 533 __u8 disc_reason; 534 535 struct delayed_work security_timer; 536 struct smp_chan *smp_chan; 537 538 struct list_head chan_l; 539 struct mutex chan_lock; 540 }; 541 542 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 543 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 544 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 545 546 #define L2CAP_CHAN_RAW 1 547 #define L2CAP_CHAN_CONN_LESS 2 548 #define L2CAP_CHAN_CONN_ORIENTED 3 549 550 /* ----- L2CAP socket info ----- */ 551 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 552 553 struct l2cap_pinfo { 554 struct bt_sock bt; 555 struct l2cap_chan *chan; 556 struct sk_buff *rx_busy_skb; 557 }; 558 559 enum { 560 CONF_REQ_SENT, 561 CONF_INPUT_DONE, 562 CONF_OUTPUT_DONE, 563 CONF_MTU_DONE, 564 CONF_MODE_DONE, 565 CONF_CONNECT_PEND, 566 CONF_NO_FCS_RECV, 567 CONF_STATE2_DEVICE, 568 CONF_EWS_RECV, 569 CONF_LOC_CONF_PEND, 570 CONF_REM_CONF_PEND, 571 }; 572 573 #define L2CAP_CONF_MAX_CONF_REQ 2 574 #define L2CAP_CONF_MAX_CONF_RSP 2 575 576 enum { 577 CONN_SREJ_SENT, 578 CONN_WAIT_F, 579 CONN_SREJ_ACT, 580 CONN_SEND_PBIT, 581 CONN_REMOTE_BUSY, 582 CONN_LOCAL_BUSY, 583 CONN_REJ_ACT, 584 CONN_SEND_FBIT, 585 CONN_RNR_SENT, 586 }; 587 588 /* Definitions for flags in l2cap_chan */ 589 enum { 590 FLAG_ROLE_SWITCH, 591 FLAG_FORCE_ACTIVE, 592 FLAG_FORCE_RELIABLE, 593 FLAG_FLUSHABLE, 594 FLAG_EXT_CTRL, 595 FLAG_EFS_ENABLE, 596 }; 597 598 static inline void l2cap_chan_hold(struct l2cap_chan *c) 599 { 600 atomic_inc(&c->refcnt); 601 } 602 603 static inline void l2cap_chan_put(struct l2cap_chan *c) 604 { 605 if (atomic_dec_and_test(&c->refcnt)) 606 kfree(c); 607 } 608 609 static inline void l2cap_set_timer(struct l2cap_chan *chan, 610 struct delayed_work *work, long timeout) 611 { 612 BT_DBG("chan %p state %d timeout %ld", chan, chan->state, timeout); 613 614 if (!__cancel_delayed_work(work)) 615 l2cap_chan_hold(chan); 616 schedule_delayed_work(work, timeout); 617 } 618 619 static inline void l2cap_clear_timer(struct l2cap_chan *chan, 620 struct delayed_work *work) 621 { 622 if (__cancel_delayed_work(work)) 623 l2cap_chan_put(chan); 624 } 625 626 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 627 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 628 #define __set_retrans_timer(c) l2cap_set_timer(c, &c->retrans_timer, \ 629 L2CAP_DEFAULT_RETRANS_TO); 630 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 631 #define __set_monitor_timer(c) l2cap_set_timer(c, &c->monitor_timer, \ 632 L2CAP_DEFAULT_MONITOR_TO); 633 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 634 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 635 L2CAP_DEFAULT_ACK_TO); 636 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 637 638 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 639 { 640 int offset; 641 642 offset = (seq1 - seq2) % (chan->tx_win_max + 1); 643 if (offset < 0) 644 offset += (chan->tx_win_max + 1); 645 646 return offset; 647 } 648 649 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 650 { 651 return (seq + 1) % (chan->tx_win_max + 1); 652 } 653 654 static inline int l2cap_tx_window_full(struct l2cap_chan *ch) 655 { 656 int sub; 657 658 sub = (ch->next_tx_seq - ch->expected_ack_seq) % 64; 659 660 if (sub < 0) 661 sub += 64; 662 663 return sub == ch->remote_tx_win; 664 } 665 666 static inline __u16 __get_reqseq(struct l2cap_chan *chan, __u32 ctrl) 667 { 668 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 669 return (ctrl & L2CAP_EXT_CTRL_REQSEQ) >> 670 L2CAP_EXT_CTRL_REQSEQ_SHIFT; 671 else 672 return (ctrl & L2CAP_CTRL_REQSEQ) >> L2CAP_CTRL_REQSEQ_SHIFT; 673 } 674 675 static inline __u32 __set_reqseq(struct l2cap_chan *chan, __u32 reqseq) 676 { 677 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 678 return (reqseq << L2CAP_EXT_CTRL_REQSEQ_SHIFT) & 679 L2CAP_EXT_CTRL_REQSEQ; 680 else 681 return (reqseq << L2CAP_CTRL_REQSEQ_SHIFT) & L2CAP_CTRL_REQSEQ; 682 } 683 684 static inline __u16 __get_txseq(struct l2cap_chan *chan, __u32 ctrl) 685 { 686 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 687 return (ctrl & L2CAP_EXT_CTRL_TXSEQ) >> 688 L2CAP_EXT_CTRL_TXSEQ_SHIFT; 689 else 690 return (ctrl & L2CAP_CTRL_TXSEQ) >> L2CAP_CTRL_TXSEQ_SHIFT; 691 } 692 693 static inline __u32 __set_txseq(struct l2cap_chan *chan, __u32 txseq) 694 { 695 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 696 return (txseq << L2CAP_EXT_CTRL_TXSEQ_SHIFT) & 697 L2CAP_EXT_CTRL_TXSEQ; 698 else 699 return (txseq << L2CAP_CTRL_TXSEQ_SHIFT) & L2CAP_CTRL_TXSEQ; 700 } 701 702 static inline bool __is_sframe(struct l2cap_chan *chan, __u32 ctrl) 703 { 704 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 705 return ctrl & L2CAP_EXT_CTRL_FRAME_TYPE; 706 else 707 return ctrl & L2CAP_CTRL_FRAME_TYPE; 708 } 709 710 static inline __u32 __set_sframe(struct l2cap_chan *chan) 711 { 712 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 713 return L2CAP_EXT_CTRL_FRAME_TYPE; 714 else 715 return L2CAP_CTRL_FRAME_TYPE; 716 } 717 718 static inline __u8 __get_ctrl_sar(struct l2cap_chan *chan, __u32 ctrl) 719 { 720 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 721 return (ctrl & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT; 722 else 723 return (ctrl & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT; 724 } 725 726 static inline __u32 __set_ctrl_sar(struct l2cap_chan *chan, __u32 sar) 727 { 728 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 729 return (sar << L2CAP_EXT_CTRL_SAR_SHIFT) & L2CAP_EXT_CTRL_SAR; 730 else 731 return (sar << L2CAP_CTRL_SAR_SHIFT) & L2CAP_CTRL_SAR; 732 } 733 734 static inline bool __is_sar_start(struct l2cap_chan *chan, __u32 ctrl) 735 { 736 return __get_ctrl_sar(chan, ctrl) == L2CAP_SAR_START; 737 } 738 739 static inline __u32 __get_sar_mask(struct l2cap_chan *chan) 740 { 741 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 742 return L2CAP_EXT_CTRL_SAR; 743 else 744 return L2CAP_CTRL_SAR; 745 } 746 747 static inline __u8 __get_ctrl_super(struct l2cap_chan *chan, __u32 ctrl) 748 { 749 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 750 return (ctrl & L2CAP_EXT_CTRL_SUPERVISE) >> 751 L2CAP_EXT_CTRL_SUPER_SHIFT; 752 else 753 return (ctrl & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT; 754 } 755 756 static inline __u32 __set_ctrl_super(struct l2cap_chan *chan, __u32 super) 757 { 758 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 759 return (super << L2CAP_EXT_CTRL_SUPER_SHIFT) & 760 L2CAP_EXT_CTRL_SUPERVISE; 761 else 762 return (super << L2CAP_CTRL_SUPER_SHIFT) & 763 L2CAP_CTRL_SUPERVISE; 764 } 765 766 static inline __u32 __set_ctrl_final(struct l2cap_chan *chan) 767 { 768 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 769 return L2CAP_EXT_CTRL_FINAL; 770 else 771 return L2CAP_CTRL_FINAL; 772 } 773 774 static inline bool __is_ctrl_final(struct l2cap_chan *chan, __u32 ctrl) 775 { 776 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 777 return ctrl & L2CAP_EXT_CTRL_FINAL; 778 else 779 return ctrl & L2CAP_CTRL_FINAL; 780 } 781 782 static inline __u32 __set_ctrl_poll(struct l2cap_chan *chan) 783 { 784 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 785 return L2CAP_EXT_CTRL_POLL; 786 else 787 return L2CAP_CTRL_POLL; 788 } 789 790 static inline bool __is_ctrl_poll(struct l2cap_chan *chan, __u32 ctrl) 791 { 792 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 793 return ctrl & L2CAP_EXT_CTRL_POLL; 794 else 795 return ctrl & L2CAP_CTRL_POLL; 796 } 797 798 static inline __u32 __get_control(struct l2cap_chan *chan, void *p) 799 { 800 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 801 return get_unaligned_le32(p); 802 else 803 return get_unaligned_le16(p); 804 } 805 806 static inline void __put_control(struct l2cap_chan *chan, __u32 control, 807 void *p) 808 { 809 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 810 return put_unaligned_le32(control, p); 811 else 812 return put_unaligned_le16(control, p); 813 } 814 815 static inline __u8 __ctrl_size(struct l2cap_chan *chan) 816 { 817 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 818 return L2CAP_EXT_HDR_SIZE - L2CAP_HDR_SIZE; 819 else 820 return L2CAP_ENH_HDR_SIZE - L2CAP_HDR_SIZE; 821 } 822 823 extern bool disable_ertm; 824 825 int l2cap_init_sockets(void); 826 void l2cap_cleanup_sockets(void); 827 828 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 829 int __l2cap_wait_ack(struct sock *sk); 830 831 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 832 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 833 834 struct l2cap_chan *l2cap_chan_create(struct sock *sk); 835 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 836 void l2cap_chan_destroy(struct l2cap_chan *chan); 837 inline int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 838 bdaddr_t *dst); 839 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len, 840 u32 priority); 841 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 842 int l2cap_chan_check_security(struct l2cap_chan *chan); 843 844 #endif /* __L2CAP_H */ 845