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 /* channel identifier */ 256 #define L2CAP_CID_SIGNALING 0x0001 257 #define L2CAP_CID_CONN_LESS 0x0002 258 #define L2CAP_CID_A2MP 0x0003 259 #define L2CAP_CID_ATT 0x0004 260 #define L2CAP_CID_LE_SIGNALING 0x0005 261 #define L2CAP_CID_SMP 0x0006 262 #define L2CAP_CID_SMP_BREDR 0x0007 263 #define L2CAP_CID_DYN_START 0x0040 264 #define L2CAP_CID_DYN_END 0xffff 265 #define L2CAP_CID_LE_DYN_END 0x007f 266 267 /* connect/create channel results */ 268 #define L2CAP_CR_SUCCESS 0x0000 269 #define L2CAP_CR_PEND 0x0001 270 #define L2CAP_CR_BAD_PSM 0x0002 271 #define L2CAP_CR_SEC_BLOCK 0x0003 272 #define L2CAP_CR_NO_MEM 0x0004 273 #define L2CAP_CR_BAD_AMP 0x0005 274 #define L2CAP_CR_AUTHENTICATION 0x0005 275 #define L2CAP_CR_AUTHORIZATION 0x0006 276 #define L2CAP_CR_BAD_KEY_SIZE 0x0007 277 #define L2CAP_CR_ENCRYPTION 0x0008 278 #define L2CAP_CR_INVALID_SCID 0x0009 279 #define L2CAP_CR_SCID_IN_USE 0x0010 280 281 /* connect/create channel status */ 282 #define L2CAP_CS_NO_INFO 0x0000 283 #define L2CAP_CS_AUTHEN_PEND 0x0001 284 #define L2CAP_CS_AUTHOR_PEND 0x0002 285 286 struct l2cap_conf_req { 287 __le16 dcid; 288 __le16 flags; 289 __u8 data[0]; 290 } __packed; 291 292 struct l2cap_conf_rsp { 293 __le16 scid; 294 __le16 flags; 295 __le16 result; 296 __u8 data[0]; 297 } __packed; 298 299 #define L2CAP_CONF_SUCCESS 0x0000 300 #define L2CAP_CONF_UNACCEPT 0x0001 301 #define L2CAP_CONF_REJECT 0x0002 302 #define L2CAP_CONF_UNKNOWN 0x0003 303 #define L2CAP_CONF_PENDING 0x0004 304 #define L2CAP_CONF_EFS_REJECT 0x0005 305 306 /* configuration req/rsp continuation flag */ 307 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 308 309 struct l2cap_conf_opt { 310 __u8 type; 311 __u8 len; 312 __u8 val[0]; 313 } __packed; 314 #define L2CAP_CONF_OPT_SIZE 2 315 316 #define L2CAP_CONF_HINT 0x80 317 #define L2CAP_CONF_MASK 0x7f 318 319 #define L2CAP_CONF_MTU 0x01 320 #define L2CAP_CONF_FLUSH_TO 0x02 321 #define L2CAP_CONF_QOS 0x03 322 #define L2CAP_CONF_RFC 0x04 323 #define L2CAP_CONF_FCS 0x05 324 #define L2CAP_CONF_EFS 0x06 325 #define L2CAP_CONF_EWS 0x07 326 327 #define L2CAP_CONF_MAX_SIZE 22 328 329 struct l2cap_conf_rfc { 330 __u8 mode; 331 __u8 txwin_size; 332 __u8 max_transmit; 333 __le16 retrans_timeout; 334 __le16 monitor_timeout; 335 __le16 max_pdu_size; 336 } __packed; 337 338 #define L2CAP_MODE_BASIC 0x00 339 #define L2CAP_MODE_RETRANS 0x01 340 #define L2CAP_MODE_FLOWCTL 0x02 341 #define L2CAP_MODE_ERTM 0x03 342 #define L2CAP_MODE_STREAMING 0x04 343 344 /* Unlike the above this one doesn't actually map to anything that would 345 * ever be sent over the air. Therefore, use a value that's unlikely to 346 * ever be used in the BR/EDR configuration phase. 347 */ 348 #define L2CAP_MODE_LE_FLOWCTL 0x80 349 350 struct l2cap_conf_efs { 351 __u8 id; 352 __u8 stype; 353 __le16 msdu; 354 __le32 sdu_itime; 355 __le32 acc_lat; 356 __le32 flush_to; 357 } __packed; 358 359 #define L2CAP_SERV_NOTRAFIC 0x00 360 #define L2CAP_SERV_BESTEFFORT 0x01 361 #define L2CAP_SERV_GUARANTEED 0x02 362 363 #define L2CAP_BESTEFFORT_ID 0x01 364 365 struct l2cap_disconn_req { 366 __le16 dcid; 367 __le16 scid; 368 } __packed; 369 370 struct l2cap_disconn_rsp { 371 __le16 dcid; 372 __le16 scid; 373 } __packed; 374 375 struct l2cap_info_req { 376 __le16 type; 377 } __packed; 378 379 struct l2cap_info_rsp { 380 __le16 type; 381 __le16 result; 382 __u8 data[0]; 383 } __packed; 384 385 struct l2cap_create_chan_req { 386 __le16 psm; 387 __le16 scid; 388 __u8 amp_id; 389 } __packed; 390 391 struct l2cap_create_chan_rsp { 392 __le16 dcid; 393 __le16 scid; 394 __le16 result; 395 __le16 status; 396 } __packed; 397 398 struct l2cap_move_chan_req { 399 __le16 icid; 400 __u8 dest_amp_id; 401 } __packed; 402 403 struct l2cap_move_chan_rsp { 404 __le16 icid; 405 __le16 result; 406 } __packed; 407 408 #define L2CAP_MR_SUCCESS 0x0000 409 #define L2CAP_MR_PEND 0x0001 410 #define L2CAP_MR_BAD_ID 0x0002 411 #define L2CAP_MR_SAME_ID 0x0003 412 #define L2CAP_MR_NOT_SUPP 0x0004 413 #define L2CAP_MR_COLLISION 0x0005 414 #define L2CAP_MR_NOT_ALLOWED 0x0006 415 416 struct l2cap_move_chan_cfm { 417 __le16 icid; 418 __le16 result; 419 } __packed; 420 421 #define L2CAP_MC_CONFIRMED 0x0000 422 #define L2CAP_MC_UNCONFIRMED 0x0001 423 424 struct l2cap_move_chan_cfm_rsp { 425 __le16 icid; 426 } __packed; 427 428 /* info type */ 429 #define L2CAP_IT_CL_MTU 0x0001 430 #define L2CAP_IT_FEAT_MASK 0x0002 431 #define L2CAP_IT_FIXED_CHAN 0x0003 432 433 /* info result */ 434 #define L2CAP_IR_SUCCESS 0x0000 435 #define L2CAP_IR_NOTSUPP 0x0001 436 437 struct l2cap_conn_param_update_req { 438 __le16 min; 439 __le16 max; 440 __le16 latency; 441 __le16 to_multiplier; 442 } __packed; 443 444 struct l2cap_conn_param_update_rsp { 445 __le16 result; 446 } __packed; 447 448 /* Connection Parameters result */ 449 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 450 #define L2CAP_CONN_PARAM_REJECTED 0x0001 451 452 #define L2CAP_LE_MAX_CREDITS 10 453 #define L2CAP_LE_DEFAULT_MPS 230 454 455 struct l2cap_le_conn_req { 456 __le16 psm; 457 __le16 scid; 458 __le16 mtu; 459 __le16 mps; 460 __le16 credits; 461 } __packed; 462 463 struct l2cap_le_conn_rsp { 464 __le16 dcid; 465 __le16 mtu; 466 __le16 mps; 467 __le16 credits; 468 __le16 result; 469 } __packed; 470 471 struct l2cap_le_credits { 472 __le16 cid; 473 __le16 credits; 474 } __packed; 475 476 /* ----- L2CAP channels and connections ----- */ 477 struct l2cap_seq_list { 478 __u16 head; 479 __u16 tail; 480 __u16 mask; 481 __u16 *list; 482 }; 483 484 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF 485 #define L2CAP_SEQ_LIST_TAIL 0x8000 486 487 struct l2cap_chan { 488 struct l2cap_conn *conn; 489 struct hci_conn *hs_hcon; 490 struct hci_chan *hs_hchan; 491 struct kref kref; 492 atomic_t nesting; 493 494 __u8 state; 495 496 bdaddr_t dst; 497 __u8 dst_type; 498 bdaddr_t src; 499 __u8 src_type; 500 __le16 psm; 501 __le16 sport; 502 __u16 dcid; 503 __u16 scid; 504 505 __u16 imtu; 506 __u16 omtu; 507 __u16 flush_to; 508 __u8 mode; 509 __u8 chan_type; 510 __u8 chan_policy; 511 512 __u8 sec_level; 513 514 __u8 ident; 515 516 __u8 conf_req[64]; 517 __u8 conf_len; 518 __u8 num_conf_req; 519 __u8 num_conf_rsp; 520 521 __u8 fcs; 522 523 __u16 tx_win; 524 __u16 tx_win_max; 525 __u16 ack_win; 526 __u8 max_tx; 527 __u16 retrans_timeout; 528 __u16 monitor_timeout; 529 __u16 mps; 530 531 __u16 tx_credits; 532 __u16 rx_credits; 533 534 __u8 tx_state; 535 __u8 rx_state; 536 537 unsigned long conf_state; 538 unsigned long conn_state; 539 unsigned long flags; 540 541 __u8 remote_amp_id; 542 __u8 local_amp_id; 543 __u8 move_id; 544 __u8 move_state; 545 __u8 move_role; 546 547 __u16 next_tx_seq; 548 __u16 expected_ack_seq; 549 __u16 expected_tx_seq; 550 __u16 buffer_seq; 551 __u16 srej_save_reqseq; 552 __u16 last_acked_seq; 553 __u16 frames_sent; 554 __u16 unacked_frames; 555 __u8 retry_count; 556 __u16 sdu_len; 557 struct sk_buff *sdu; 558 struct sk_buff *sdu_last_frag; 559 560 __u16 remote_tx_win; 561 __u8 remote_max_tx; 562 __u16 remote_mps; 563 564 __u8 local_id; 565 __u8 local_stype; 566 __u16 local_msdu; 567 __u32 local_sdu_itime; 568 __u32 local_acc_lat; 569 __u32 local_flush_to; 570 571 __u8 remote_id; 572 __u8 remote_stype; 573 __u16 remote_msdu; 574 __u32 remote_sdu_itime; 575 __u32 remote_acc_lat; 576 __u32 remote_flush_to; 577 578 struct delayed_work chan_timer; 579 struct delayed_work retrans_timer; 580 struct delayed_work monitor_timer; 581 struct delayed_work ack_timer; 582 583 struct sk_buff *tx_send_head; 584 struct sk_buff_head tx_q; 585 struct sk_buff_head srej_q; 586 struct l2cap_seq_list srej_list; 587 struct l2cap_seq_list retrans_list; 588 589 struct list_head list; 590 struct list_head global_l; 591 592 void *data; 593 const struct l2cap_ops *ops; 594 struct mutex lock; 595 }; 596 597 struct l2cap_ops { 598 char *name; 599 600 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 601 int (*recv) (struct l2cap_chan * chan, 602 struct sk_buff *skb); 603 void (*teardown) (struct l2cap_chan *chan, int err); 604 void (*close) (struct l2cap_chan *chan); 605 void (*state_change) (struct l2cap_chan *chan, 606 int state, int err); 607 void (*ready) (struct l2cap_chan *chan); 608 void (*defer) (struct l2cap_chan *chan); 609 void (*resume) (struct l2cap_chan *chan); 610 void (*suspend) (struct l2cap_chan *chan); 611 void (*set_shutdown) (struct l2cap_chan *chan); 612 long (*get_sndtimeo) (struct l2cap_chan *chan); 613 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 614 unsigned long hdr_len, 615 unsigned long len, int nb); 616 }; 617 618 struct l2cap_conn { 619 struct hci_conn *hcon; 620 struct hci_chan *hchan; 621 622 unsigned int mtu; 623 624 __u32 feat_mask; 625 __u8 remote_fixed_chan; 626 __u8 local_fixed_chan; 627 628 __u8 info_state; 629 __u8 info_ident; 630 631 struct delayed_work info_timer; 632 633 struct sk_buff *rx_skb; 634 __u32 rx_len; 635 __u8 tx_ident; 636 struct mutex ident_lock; 637 638 struct sk_buff_head pending_rx; 639 struct work_struct pending_rx_work; 640 641 struct work_struct id_addr_update_work; 642 643 __u8 disc_reason; 644 645 struct l2cap_chan *smp; 646 647 struct list_head chan_l; 648 struct mutex chan_lock; 649 struct kref ref; 650 struct list_head users; 651 }; 652 653 struct l2cap_user { 654 struct list_head list; 655 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); 656 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); 657 }; 658 659 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 660 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 661 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 662 663 #define L2CAP_CHAN_RAW 1 664 #define L2CAP_CHAN_CONN_LESS 2 665 #define L2CAP_CHAN_CONN_ORIENTED 3 666 #define L2CAP_CHAN_FIXED 4 667 668 /* ----- L2CAP socket info ----- */ 669 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 670 671 struct l2cap_pinfo { 672 struct bt_sock bt; 673 struct l2cap_chan *chan; 674 struct sk_buff *rx_busy_skb; 675 }; 676 677 enum { 678 CONF_REQ_SENT, 679 CONF_INPUT_DONE, 680 CONF_OUTPUT_DONE, 681 CONF_MTU_DONE, 682 CONF_MODE_DONE, 683 CONF_CONNECT_PEND, 684 CONF_RECV_NO_FCS, 685 CONF_STATE2_DEVICE, 686 CONF_EWS_RECV, 687 CONF_LOC_CONF_PEND, 688 CONF_REM_CONF_PEND, 689 CONF_NOT_COMPLETE, 690 }; 691 692 #define L2CAP_CONF_MAX_CONF_REQ 2 693 #define L2CAP_CONF_MAX_CONF_RSP 2 694 695 enum { 696 CONN_SREJ_SENT, 697 CONN_WAIT_F, 698 CONN_SREJ_ACT, 699 CONN_SEND_PBIT, 700 CONN_REMOTE_BUSY, 701 CONN_LOCAL_BUSY, 702 CONN_REJ_ACT, 703 CONN_SEND_FBIT, 704 CONN_RNR_SENT, 705 }; 706 707 /* Definitions for flags in l2cap_chan */ 708 enum { 709 FLAG_ROLE_SWITCH, 710 FLAG_FORCE_ACTIVE, 711 FLAG_FORCE_RELIABLE, 712 FLAG_FLUSHABLE, 713 FLAG_EXT_CTRL, 714 FLAG_EFS_ENABLE, 715 FLAG_DEFER_SETUP, 716 FLAG_LE_CONN_REQ_SENT, 717 FLAG_PENDING_SECURITY, 718 FLAG_HOLD_HCI_CONN, 719 }; 720 721 /* Lock nesting levels for L2CAP channels. We need these because lockdep 722 * otherwise considers all channels equal and will e.g. complain about a 723 * connection oriented channel triggering SMP procedures or a listening 724 * channel creating and locking a child channel. 725 */ 726 enum { 727 L2CAP_NESTING_SMP, 728 L2CAP_NESTING_NORMAL, 729 L2CAP_NESTING_PARENT, 730 }; 731 732 enum { 733 L2CAP_TX_STATE_XMIT, 734 L2CAP_TX_STATE_WAIT_F, 735 }; 736 737 enum { 738 L2CAP_RX_STATE_RECV, 739 L2CAP_RX_STATE_SREJ_SENT, 740 L2CAP_RX_STATE_MOVE, 741 L2CAP_RX_STATE_WAIT_P, 742 L2CAP_RX_STATE_WAIT_F, 743 }; 744 745 enum { 746 L2CAP_TXSEQ_EXPECTED, 747 L2CAP_TXSEQ_EXPECTED_SREJ, 748 L2CAP_TXSEQ_UNEXPECTED, 749 L2CAP_TXSEQ_UNEXPECTED_SREJ, 750 L2CAP_TXSEQ_DUPLICATE, 751 L2CAP_TXSEQ_DUPLICATE_SREJ, 752 L2CAP_TXSEQ_INVALID, 753 L2CAP_TXSEQ_INVALID_IGNORE, 754 }; 755 756 enum { 757 L2CAP_EV_DATA_REQUEST, 758 L2CAP_EV_LOCAL_BUSY_DETECTED, 759 L2CAP_EV_LOCAL_BUSY_CLEAR, 760 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 761 L2CAP_EV_RECV_FBIT, 762 L2CAP_EV_RETRANS_TO, 763 L2CAP_EV_MONITOR_TO, 764 L2CAP_EV_EXPLICIT_POLL, 765 L2CAP_EV_RECV_IFRAME, 766 L2CAP_EV_RECV_RR, 767 L2CAP_EV_RECV_REJ, 768 L2CAP_EV_RECV_RNR, 769 L2CAP_EV_RECV_SREJ, 770 L2CAP_EV_RECV_FRAME, 771 }; 772 773 enum { 774 L2CAP_MOVE_ROLE_NONE, 775 L2CAP_MOVE_ROLE_INITIATOR, 776 L2CAP_MOVE_ROLE_RESPONDER, 777 }; 778 779 enum { 780 L2CAP_MOVE_STABLE, 781 L2CAP_MOVE_WAIT_REQ, 782 L2CAP_MOVE_WAIT_RSP, 783 L2CAP_MOVE_WAIT_RSP_SUCCESS, 784 L2CAP_MOVE_WAIT_CONFIRM, 785 L2CAP_MOVE_WAIT_CONFIRM_RSP, 786 L2CAP_MOVE_WAIT_LOGICAL_COMP, 787 L2CAP_MOVE_WAIT_LOGICAL_CFM, 788 L2CAP_MOVE_WAIT_LOCAL_BUSY, 789 L2CAP_MOVE_WAIT_PREPARE, 790 }; 791 792 void l2cap_chan_hold(struct l2cap_chan *c); 793 void l2cap_chan_put(struct l2cap_chan *c); 794 795 static inline void l2cap_chan_lock(struct l2cap_chan *chan) 796 { 797 mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting)); 798 } 799 800 static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 801 { 802 mutex_unlock(&chan->lock); 803 } 804 805 static inline void l2cap_set_timer(struct l2cap_chan *chan, 806 struct delayed_work *work, long timeout) 807 { 808 BT_DBG("chan %p state %s timeout %ld", chan, 809 state_to_string(chan->state), timeout); 810 811 /* If delayed work cancelled do not hold(chan) 812 since it is already done with previous set_timer */ 813 if (!cancel_delayed_work(work)) 814 l2cap_chan_hold(chan); 815 816 schedule_delayed_work(work, timeout); 817 } 818 819 static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 820 struct delayed_work *work) 821 { 822 bool ret; 823 824 /* put(chan) if delayed work cancelled otherwise it 825 is done in delayed work function */ 826 ret = cancel_delayed_work(work); 827 if (ret) 828 l2cap_chan_put(chan); 829 830 return ret; 831 } 832 833 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 834 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 835 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 836 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 837 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 838 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 839 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 840 841 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 842 { 843 if (seq1 >= seq2) 844 return seq1 - seq2; 845 else 846 return chan->tx_win_max + 1 - seq2 + seq1; 847 } 848 849 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 850 { 851 return (seq + 1) % (chan->tx_win_max + 1); 852 } 853 854 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 855 { 856 return NULL; 857 } 858 859 static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb) 860 { 861 return -ENOSYS; 862 } 863 864 static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan, 865 unsigned long hdr_len, 866 unsigned long len, int nb) 867 { 868 return ERR_PTR(-ENOSYS); 869 } 870 871 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 872 { 873 } 874 875 static inline void l2cap_chan_no_close(struct l2cap_chan *chan) 876 { 877 } 878 879 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 880 { 881 } 882 883 static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan, 884 int state, int err) 885 { 886 } 887 888 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) 889 { 890 } 891 892 static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan) 893 { 894 } 895 896 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) 897 { 898 } 899 900 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) 901 { 902 } 903 904 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) 905 { 906 return 0; 907 } 908 909 extern bool disable_ertm; 910 911 int l2cap_init_sockets(void); 912 void l2cap_cleanup_sockets(void); 913 bool l2cap_is_socket(struct socket *sock); 914 915 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan); 916 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 917 918 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 919 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 920 921 struct l2cap_chan *l2cap_chan_create(void); 922 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 923 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 924 bdaddr_t *dst, u8 dst_type); 925 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len); 926 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 927 int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator); 928 void l2cap_chan_set_defaults(struct l2cap_chan *chan); 929 int l2cap_ertm_init(struct l2cap_chan *chan); 930 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 931 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 932 void l2cap_chan_del(struct l2cap_chan *chan, int err); 933 void l2cap_send_conn_req(struct l2cap_chan *chan); 934 void l2cap_move_start(struct l2cap_chan *chan); 935 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, 936 u8 status); 937 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result); 938 939 struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn); 940 void l2cap_conn_put(struct l2cap_conn *conn); 941 942 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); 943 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); 944 945 #endif /* __L2CAP_H */ 946