1 /* 2 BlueZ - Bluetooth protocol stack for Linux 3 Copyright (C) 2000-2001 Qualcomm Incorporated 4 Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> 5 Copyright (C) 2010 Google Inc. 6 7 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License version 2 as 11 published by the Free Software Foundation; 12 13 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 14 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 16 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY 17 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 18 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 19 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 20 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 21 22 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 23 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 24 SOFTWARE IS DISCLAIMED. 25 */ 26 27 #ifndef __L2CAP_H 28 #define __L2CAP_H 29 30 #include <asm/unaligned.h> 31 #include <linux/atomic.h> 32 33 /* L2CAP defaults */ 34 #define L2CAP_DEFAULT_MTU 672 35 #define L2CAP_DEFAULT_MIN_MTU 48 36 #define L2CAP_DEFAULT_FLUSH_TO 0xFFFF 37 #define L2CAP_EFS_DEFAULT_FLUSH_TO 0xFFFFFFFF 38 #define L2CAP_DEFAULT_TX_WINDOW 63 39 #define L2CAP_DEFAULT_EXT_WINDOW 0x3FFF 40 #define L2CAP_DEFAULT_MAX_TX 3 41 #define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */ 42 #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */ 43 #define L2CAP_DEFAULT_MAX_PDU_SIZE 1492 /* Sized for AMP packet */ 44 #define L2CAP_DEFAULT_ACK_TO 200 45 #define L2CAP_DEFAULT_MAX_SDU_SIZE 0xFFFF 46 #define L2CAP_DEFAULT_SDU_ITIME 0xFFFFFFFF 47 #define L2CAP_DEFAULT_ACC_LAT 0xFFFFFFFF 48 #define L2CAP_BREDR_MAX_PAYLOAD 1019 /* 3-DH5 packet */ 49 #define L2CAP_LE_MIN_MTU 23 50 51 #define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100) 52 #define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000) 53 #define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000) 54 #define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000) 55 #define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000) 56 #define L2CAP_MOVE_TIMEOUT msecs_to_jiffies(4000) 57 #define L2CAP_MOVE_ERTX_TIMEOUT msecs_to_jiffies(60000) 58 #define L2CAP_WAIT_ACK_POLL_PERIOD msecs_to_jiffies(200) 59 #define L2CAP_WAIT_ACK_TIMEOUT msecs_to_jiffies(10000) 60 61 #define L2CAP_A2MP_DEFAULT_MTU 670 62 63 /* L2CAP socket address */ 64 struct sockaddr_l2 { 65 sa_family_t l2_family; 66 __le16 l2_psm; 67 bdaddr_t l2_bdaddr; 68 __le16 l2_cid; 69 __u8 l2_bdaddr_type; 70 }; 71 72 /* L2CAP socket options */ 73 #define L2CAP_OPTIONS 0x01 74 struct l2cap_options { 75 __u16 omtu; 76 __u16 imtu; 77 __u16 flush_to; 78 __u8 mode; 79 __u8 fcs; 80 __u8 max_tx; 81 __u16 txwin_size; 82 }; 83 84 #define L2CAP_CONNINFO 0x02 85 struct l2cap_conninfo { 86 __u16 hci_handle; 87 __u8 dev_class[3]; 88 }; 89 90 #define L2CAP_LM 0x03 91 #define L2CAP_LM_MASTER 0x0001 92 #define L2CAP_LM_AUTH 0x0002 93 #define L2CAP_LM_ENCRYPT 0x0004 94 #define L2CAP_LM_TRUSTED 0x0008 95 #define L2CAP_LM_RELIABLE 0x0010 96 #define L2CAP_LM_SECURE 0x0020 97 #define L2CAP_LM_FIPS 0x0040 98 99 /* L2CAP command codes */ 100 #define L2CAP_COMMAND_REJ 0x01 101 #define L2CAP_CONN_REQ 0x02 102 #define L2CAP_CONN_RSP 0x03 103 #define L2CAP_CONF_REQ 0x04 104 #define L2CAP_CONF_RSP 0x05 105 #define L2CAP_DISCONN_REQ 0x06 106 #define L2CAP_DISCONN_RSP 0x07 107 #define L2CAP_ECHO_REQ 0x08 108 #define L2CAP_ECHO_RSP 0x09 109 #define L2CAP_INFO_REQ 0x0a 110 #define L2CAP_INFO_RSP 0x0b 111 #define L2CAP_CREATE_CHAN_REQ 0x0c 112 #define L2CAP_CREATE_CHAN_RSP 0x0d 113 #define L2CAP_MOVE_CHAN_REQ 0x0e 114 #define L2CAP_MOVE_CHAN_RSP 0x0f 115 #define L2CAP_MOVE_CHAN_CFM 0x10 116 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11 117 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12 118 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13 119 #define L2CAP_LE_CONN_REQ 0x14 120 #define L2CAP_LE_CONN_RSP 0x15 121 #define L2CAP_LE_CREDITS 0x16 122 123 /* L2CAP extended feature mask */ 124 #define L2CAP_FEAT_FLOWCTL 0x00000001 125 #define L2CAP_FEAT_RETRANS 0x00000002 126 #define L2CAP_FEAT_BIDIR_QOS 0x00000004 127 #define L2CAP_FEAT_ERTM 0x00000008 128 #define L2CAP_FEAT_STREAMING 0x00000010 129 #define L2CAP_FEAT_FCS 0x00000020 130 #define L2CAP_FEAT_EXT_FLOW 0x00000040 131 #define L2CAP_FEAT_FIXED_CHAN 0x00000080 132 #define L2CAP_FEAT_EXT_WINDOW 0x00000100 133 #define L2CAP_FEAT_UCD 0x00000200 134 135 /* L2CAP checksum option */ 136 #define L2CAP_FCS_NONE 0x00 137 #define L2CAP_FCS_CRC16 0x01 138 139 /* L2CAP fixed channels */ 140 #define L2CAP_FC_SIG_BREDR 0x02 141 #define L2CAP_FC_CONNLESS 0x04 142 #define L2CAP_FC_A2MP 0x08 143 #define L2CAP_FC_ATT 0x10 144 #define L2CAP_FC_SIG_LE 0x20 145 #define L2CAP_FC_SMP_LE 0x40 146 #define L2CAP_FC_SMP_BREDR 0x80 147 148 /* L2CAP Control Field bit masks */ 149 #define L2CAP_CTRL_SAR 0xC000 150 #define L2CAP_CTRL_REQSEQ 0x3F00 151 #define L2CAP_CTRL_TXSEQ 0x007E 152 #define L2CAP_CTRL_SUPERVISE 0x000C 153 154 #define L2CAP_CTRL_RETRANS 0x0080 155 #define L2CAP_CTRL_FINAL 0x0080 156 #define L2CAP_CTRL_POLL 0x0010 157 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 158 159 #define L2CAP_CTRL_TXSEQ_SHIFT 1 160 #define L2CAP_CTRL_SUPER_SHIFT 2 161 #define L2CAP_CTRL_POLL_SHIFT 4 162 #define L2CAP_CTRL_FINAL_SHIFT 7 163 #define L2CAP_CTRL_REQSEQ_SHIFT 8 164 #define L2CAP_CTRL_SAR_SHIFT 14 165 166 /* L2CAP Extended Control Field bit mask */ 167 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 168 #define L2CAP_EXT_CTRL_SAR 0x00030000 169 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 170 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 171 172 #define L2CAP_EXT_CTRL_POLL 0x00040000 173 #define L2CAP_EXT_CTRL_FINAL 0x00000002 174 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 175 176 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1 177 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 178 #define L2CAP_EXT_CTRL_SAR_SHIFT 16 179 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 180 #define L2CAP_EXT_CTRL_POLL_SHIFT 18 181 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 182 183 /* L2CAP Supervisory Function */ 184 #define L2CAP_SUPER_RR 0x00 185 #define L2CAP_SUPER_REJ 0x01 186 #define L2CAP_SUPER_RNR 0x02 187 #define L2CAP_SUPER_SREJ 0x03 188 189 /* L2CAP Segmentation and Reassembly */ 190 #define L2CAP_SAR_UNSEGMENTED 0x00 191 #define L2CAP_SAR_START 0x01 192 #define L2CAP_SAR_END 0x02 193 #define L2CAP_SAR_CONTINUE 0x03 194 195 /* L2CAP Command rej. reasons */ 196 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 197 #define L2CAP_REJ_MTU_EXCEEDED 0x0001 198 #define L2CAP_REJ_INVALID_CID 0x0002 199 200 /* L2CAP structures */ 201 struct l2cap_hdr { 202 __le16 len; 203 __le16 cid; 204 } __packed; 205 #define L2CAP_HDR_SIZE 4 206 #define L2CAP_ENH_HDR_SIZE 6 207 #define L2CAP_EXT_HDR_SIZE 8 208 209 #define L2CAP_FCS_SIZE 2 210 #define L2CAP_SDULEN_SIZE 2 211 #define L2CAP_PSMLEN_SIZE 2 212 #define L2CAP_ENH_CTRL_SIZE 2 213 #define L2CAP_EXT_CTRL_SIZE 4 214 215 struct l2cap_cmd_hdr { 216 __u8 code; 217 __u8 ident; 218 __le16 len; 219 } __packed; 220 #define L2CAP_CMD_HDR_SIZE 4 221 222 struct l2cap_cmd_rej_unk { 223 __le16 reason; 224 } __packed; 225 226 struct l2cap_cmd_rej_mtu { 227 __le16 reason; 228 __le16 max_mtu; 229 } __packed; 230 231 struct l2cap_cmd_rej_cid { 232 __le16 reason; 233 __le16 scid; 234 __le16 dcid; 235 } __packed; 236 237 struct l2cap_conn_req { 238 __le16 psm; 239 __le16 scid; 240 } __packed; 241 242 struct l2cap_conn_rsp { 243 __le16 dcid; 244 __le16 scid; 245 __le16 result; 246 __le16 status; 247 } __packed; 248 249 /* protocol/service multiplexer (PSM) */ 250 #define L2CAP_PSM_SDP 0x0001 251 #define L2CAP_PSM_RFCOMM 0x0003 252 #define L2CAP_PSM_3DSP 0x0021 253 #define L2CAP_PSM_IPSP 0x0023 /* 6LoWPAN */ 254 255 #define L2CAP_PSM_DYN_START 0x1001 256 #define L2CAP_PSM_DYN_END 0xffff 257 #define L2CAP_PSM_AUTO_END 0x10ff 258 #define L2CAP_PSM_LE_DYN_START 0x0080 259 #define L2CAP_PSM_LE_DYN_END 0x00ff 260 261 /* channel identifier */ 262 #define L2CAP_CID_SIGNALING 0x0001 263 #define L2CAP_CID_CONN_LESS 0x0002 264 #define L2CAP_CID_A2MP 0x0003 265 #define L2CAP_CID_ATT 0x0004 266 #define L2CAP_CID_LE_SIGNALING 0x0005 267 #define L2CAP_CID_SMP 0x0006 268 #define L2CAP_CID_SMP_BREDR 0x0007 269 #define L2CAP_CID_DYN_START 0x0040 270 #define L2CAP_CID_DYN_END 0xffff 271 #define L2CAP_CID_LE_DYN_END 0x007f 272 273 /* connect/create channel results */ 274 #define L2CAP_CR_SUCCESS 0x0000 275 #define L2CAP_CR_PEND 0x0001 276 #define L2CAP_CR_BAD_PSM 0x0002 277 #define L2CAP_CR_SEC_BLOCK 0x0003 278 #define L2CAP_CR_NO_MEM 0x0004 279 #define L2CAP_CR_BAD_AMP 0x0005 280 281 /* credit based connect results */ 282 #define L2CAP_CR_LE_SUCCESS 0x0000 283 #define L2CAP_CR_LE_BAD_PSM 0x0002 284 #define L2CAP_CR_LE_NO_MEM 0x0004 285 #define L2CAP_CR_LE_AUTHENTICATION 0x0005 286 #define L2CAP_CR_LE_AUTHORIZATION 0x0006 287 #define L2CAP_CR_LE_BAD_KEY_SIZE 0x0007 288 #define L2CAP_CR_LE_ENCRYPTION 0x0008 289 #define L2CAP_CR_LE_INVALID_SCID 0x0009 290 #define L2CAP_CR_LE_SCID_IN_USE 0X000A 291 292 /* connect/create channel status */ 293 #define L2CAP_CS_NO_INFO 0x0000 294 #define L2CAP_CS_AUTHEN_PEND 0x0001 295 #define L2CAP_CS_AUTHOR_PEND 0x0002 296 297 struct l2cap_conf_req { 298 __le16 dcid; 299 __le16 flags; 300 __u8 data[0]; 301 } __packed; 302 303 struct l2cap_conf_rsp { 304 __le16 scid; 305 __le16 flags; 306 __le16 result; 307 __u8 data[0]; 308 } __packed; 309 310 #define L2CAP_CONF_SUCCESS 0x0000 311 #define L2CAP_CONF_UNACCEPT 0x0001 312 #define L2CAP_CONF_REJECT 0x0002 313 #define L2CAP_CONF_UNKNOWN 0x0003 314 #define L2CAP_CONF_PENDING 0x0004 315 #define L2CAP_CONF_EFS_REJECT 0x0005 316 317 /* configuration req/rsp continuation flag */ 318 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 319 320 struct l2cap_conf_opt { 321 __u8 type; 322 __u8 len; 323 __u8 val[0]; 324 } __packed; 325 #define L2CAP_CONF_OPT_SIZE 2 326 327 #define L2CAP_CONF_HINT 0x80 328 #define L2CAP_CONF_MASK 0x7f 329 330 #define L2CAP_CONF_MTU 0x01 331 #define L2CAP_CONF_FLUSH_TO 0x02 332 #define L2CAP_CONF_QOS 0x03 333 #define L2CAP_CONF_RFC 0x04 334 #define L2CAP_CONF_FCS 0x05 335 #define L2CAP_CONF_EFS 0x06 336 #define L2CAP_CONF_EWS 0x07 337 338 #define L2CAP_CONF_MAX_SIZE 22 339 340 struct l2cap_conf_rfc { 341 __u8 mode; 342 __u8 txwin_size; 343 __u8 max_transmit; 344 __le16 retrans_timeout; 345 __le16 monitor_timeout; 346 __le16 max_pdu_size; 347 } __packed; 348 349 #define L2CAP_MODE_BASIC 0x00 350 #define L2CAP_MODE_RETRANS 0x01 351 #define L2CAP_MODE_FLOWCTL 0x02 352 #define L2CAP_MODE_ERTM 0x03 353 #define L2CAP_MODE_STREAMING 0x04 354 355 /* Unlike the above this one doesn't actually map to anything that would 356 * ever be sent over the air. Therefore, use a value that's unlikely to 357 * ever be used in the BR/EDR configuration phase. 358 */ 359 #define L2CAP_MODE_LE_FLOWCTL 0x80 360 361 struct l2cap_conf_efs { 362 __u8 id; 363 __u8 stype; 364 __le16 msdu; 365 __le32 sdu_itime; 366 __le32 acc_lat; 367 __le32 flush_to; 368 } __packed; 369 370 #define L2CAP_SERV_NOTRAFIC 0x00 371 #define L2CAP_SERV_BESTEFFORT 0x01 372 #define L2CAP_SERV_GUARANTEED 0x02 373 374 #define L2CAP_BESTEFFORT_ID 0x01 375 376 struct l2cap_disconn_req { 377 __le16 dcid; 378 __le16 scid; 379 } __packed; 380 381 struct l2cap_disconn_rsp { 382 __le16 dcid; 383 __le16 scid; 384 } __packed; 385 386 struct l2cap_info_req { 387 __le16 type; 388 } __packed; 389 390 struct l2cap_info_rsp { 391 __le16 type; 392 __le16 result; 393 __u8 data[0]; 394 } __packed; 395 396 struct l2cap_create_chan_req { 397 __le16 psm; 398 __le16 scid; 399 __u8 amp_id; 400 } __packed; 401 402 struct l2cap_create_chan_rsp { 403 __le16 dcid; 404 __le16 scid; 405 __le16 result; 406 __le16 status; 407 } __packed; 408 409 struct l2cap_move_chan_req { 410 __le16 icid; 411 __u8 dest_amp_id; 412 } __packed; 413 414 struct l2cap_move_chan_rsp { 415 __le16 icid; 416 __le16 result; 417 } __packed; 418 419 #define L2CAP_MR_SUCCESS 0x0000 420 #define L2CAP_MR_PEND 0x0001 421 #define L2CAP_MR_BAD_ID 0x0002 422 #define L2CAP_MR_SAME_ID 0x0003 423 #define L2CAP_MR_NOT_SUPP 0x0004 424 #define L2CAP_MR_COLLISION 0x0005 425 #define L2CAP_MR_NOT_ALLOWED 0x0006 426 427 struct l2cap_move_chan_cfm { 428 __le16 icid; 429 __le16 result; 430 } __packed; 431 432 #define L2CAP_MC_CONFIRMED 0x0000 433 #define L2CAP_MC_UNCONFIRMED 0x0001 434 435 struct l2cap_move_chan_cfm_rsp { 436 __le16 icid; 437 } __packed; 438 439 /* info type */ 440 #define L2CAP_IT_CL_MTU 0x0001 441 #define L2CAP_IT_FEAT_MASK 0x0002 442 #define L2CAP_IT_FIXED_CHAN 0x0003 443 444 /* info result */ 445 #define L2CAP_IR_SUCCESS 0x0000 446 #define L2CAP_IR_NOTSUPP 0x0001 447 448 struct l2cap_conn_param_update_req { 449 __le16 min; 450 __le16 max; 451 __le16 latency; 452 __le16 to_multiplier; 453 } __packed; 454 455 struct l2cap_conn_param_update_rsp { 456 __le16 result; 457 } __packed; 458 459 /* Connection Parameters result */ 460 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 461 #define L2CAP_CONN_PARAM_REJECTED 0x0001 462 463 struct l2cap_le_conn_req { 464 __le16 psm; 465 __le16 scid; 466 __le16 mtu; 467 __le16 mps; 468 __le16 credits; 469 } __packed; 470 471 struct l2cap_le_conn_rsp { 472 __le16 dcid; 473 __le16 mtu; 474 __le16 mps; 475 __le16 credits; 476 __le16 result; 477 } __packed; 478 479 struct l2cap_le_credits { 480 __le16 cid; 481 __le16 credits; 482 } __packed; 483 484 /* ----- L2CAP channels and connections ----- */ 485 struct l2cap_seq_list { 486 __u16 head; 487 __u16 tail; 488 __u16 mask; 489 __u16 *list; 490 }; 491 492 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF 493 #define L2CAP_SEQ_LIST_TAIL 0x8000 494 495 struct l2cap_chan { 496 struct l2cap_conn *conn; 497 struct hci_conn *hs_hcon; 498 struct hci_chan *hs_hchan; 499 struct kref kref; 500 atomic_t nesting; 501 502 __u8 state; 503 504 bdaddr_t dst; 505 __u8 dst_type; 506 bdaddr_t src; 507 __u8 src_type; 508 __le16 psm; 509 __le16 sport; 510 __u16 dcid; 511 __u16 scid; 512 513 __u16 imtu; 514 __u16 omtu; 515 __u16 flush_to; 516 __u8 mode; 517 __u8 chan_type; 518 __u8 chan_policy; 519 520 __u8 sec_level; 521 522 __u8 ident; 523 524 __u8 conf_req[64]; 525 __u8 conf_len; 526 __u8 num_conf_req; 527 __u8 num_conf_rsp; 528 529 __u8 fcs; 530 531 __u16 tx_win; 532 __u16 tx_win_max; 533 __u16 ack_win; 534 __u8 max_tx; 535 __u16 retrans_timeout; 536 __u16 monitor_timeout; 537 __u16 mps; 538 539 __u16 tx_credits; 540 __u16 rx_credits; 541 542 __u8 tx_state; 543 __u8 rx_state; 544 545 unsigned long conf_state; 546 unsigned long conn_state; 547 unsigned long flags; 548 549 __u8 remote_amp_id; 550 __u8 local_amp_id; 551 __u8 move_id; 552 __u8 move_state; 553 __u8 move_role; 554 555 __u16 next_tx_seq; 556 __u16 expected_ack_seq; 557 __u16 expected_tx_seq; 558 __u16 buffer_seq; 559 __u16 srej_save_reqseq; 560 __u16 last_acked_seq; 561 __u16 frames_sent; 562 __u16 unacked_frames; 563 __u8 retry_count; 564 __u16 sdu_len; 565 struct sk_buff *sdu; 566 struct sk_buff *sdu_last_frag; 567 568 __u16 remote_tx_win; 569 __u8 remote_max_tx; 570 __u16 remote_mps; 571 572 __u8 local_id; 573 __u8 local_stype; 574 __u16 local_msdu; 575 __u32 local_sdu_itime; 576 __u32 local_acc_lat; 577 __u32 local_flush_to; 578 579 __u8 remote_id; 580 __u8 remote_stype; 581 __u16 remote_msdu; 582 __u32 remote_sdu_itime; 583 __u32 remote_acc_lat; 584 __u32 remote_flush_to; 585 586 struct delayed_work chan_timer; 587 struct delayed_work retrans_timer; 588 struct delayed_work monitor_timer; 589 struct delayed_work ack_timer; 590 591 struct sk_buff *tx_send_head; 592 struct sk_buff_head tx_q; 593 struct sk_buff_head srej_q; 594 struct l2cap_seq_list srej_list; 595 struct l2cap_seq_list retrans_list; 596 597 struct list_head list; 598 struct list_head global_l; 599 600 void *data; 601 const struct l2cap_ops *ops; 602 struct mutex lock; 603 }; 604 605 struct l2cap_ops { 606 char *name; 607 608 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 609 int (*recv) (struct l2cap_chan * chan, 610 struct sk_buff *skb); 611 void (*teardown) (struct l2cap_chan *chan, int err); 612 void (*close) (struct l2cap_chan *chan); 613 void (*state_change) (struct l2cap_chan *chan, 614 int state, int err); 615 void (*ready) (struct l2cap_chan *chan); 616 void (*defer) (struct l2cap_chan *chan); 617 void (*resume) (struct l2cap_chan *chan); 618 void (*suspend) (struct l2cap_chan *chan); 619 void (*set_shutdown) (struct l2cap_chan *chan); 620 long (*get_sndtimeo) (struct l2cap_chan *chan); 621 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 622 unsigned long hdr_len, 623 unsigned long len, int nb); 624 }; 625 626 struct l2cap_conn { 627 struct hci_conn *hcon; 628 struct hci_chan *hchan; 629 630 unsigned int mtu; 631 632 __u32 feat_mask; 633 __u8 remote_fixed_chan; 634 __u8 local_fixed_chan; 635 636 __u8 info_state; 637 __u8 info_ident; 638 639 struct delayed_work info_timer; 640 641 struct sk_buff *rx_skb; 642 __u32 rx_len; 643 __u8 tx_ident; 644 struct mutex ident_lock; 645 646 struct sk_buff_head pending_rx; 647 struct work_struct pending_rx_work; 648 649 struct work_struct id_addr_update_work; 650 651 __u8 disc_reason; 652 653 struct l2cap_chan *smp; 654 655 struct list_head chan_l; 656 struct mutex chan_lock; 657 struct kref ref; 658 struct list_head users; 659 }; 660 661 struct l2cap_user { 662 struct list_head list; 663 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); 664 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); 665 }; 666 667 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 668 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 669 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 670 671 #define L2CAP_CHAN_RAW 1 672 #define L2CAP_CHAN_CONN_LESS 2 673 #define L2CAP_CHAN_CONN_ORIENTED 3 674 #define L2CAP_CHAN_FIXED 4 675 676 /* ----- L2CAP socket info ----- */ 677 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 678 679 struct l2cap_pinfo { 680 struct bt_sock bt; 681 struct l2cap_chan *chan; 682 struct sk_buff *rx_busy_skb; 683 }; 684 685 enum { 686 CONF_REQ_SENT, 687 CONF_INPUT_DONE, 688 CONF_OUTPUT_DONE, 689 CONF_MTU_DONE, 690 CONF_MODE_DONE, 691 CONF_CONNECT_PEND, 692 CONF_RECV_NO_FCS, 693 CONF_STATE2_DEVICE, 694 CONF_EWS_RECV, 695 CONF_LOC_CONF_PEND, 696 CONF_REM_CONF_PEND, 697 CONF_NOT_COMPLETE, 698 }; 699 700 #define L2CAP_CONF_MAX_CONF_REQ 2 701 #define L2CAP_CONF_MAX_CONF_RSP 2 702 703 enum { 704 CONN_SREJ_SENT, 705 CONN_WAIT_F, 706 CONN_SREJ_ACT, 707 CONN_SEND_PBIT, 708 CONN_REMOTE_BUSY, 709 CONN_LOCAL_BUSY, 710 CONN_REJ_ACT, 711 CONN_SEND_FBIT, 712 CONN_RNR_SENT, 713 }; 714 715 /* Definitions for flags in l2cap_chan */ 716 enum { 717 FLAG_ROLE_SWITCH, 718 FLAG_FORCE_ACTIVE, 719 FLAG_FORCE_RELIABLE, 720 FLAG_FLUSHABLE, 721 FLAG_EXT_CTRL, 722 FLAG_EFS_ENABLE, 723 FLAG_DEFER_SETUP, 724 FLAG_LE_CONN_REQ_SENT, 725 FLAG_PENDING_SECURITY, 726 FLAG_HOLD_HCI_CONN, 727 }; 728 729 /* Lock nesting levels for L2CAP channels. We need these because lockdep 730 * otherwise considers all channels equal and will e.g. complain about a 731 * connection oriented channel triggering SMP procedures or a listening 732 * channel creating and locking a child channel. 733 */ 734 enum { 735 L2CAP_NESTING_SMP, 736 L2CAP_NESTING_NORMAL, 737 L2CAP_NESTING_PARENT, 738 }; 739 740 enum { 741 L2CAP_TX_STATE_XMIT, 742 L2CAP_TX_STATE_WAIT_F, 743 }; 744 745 enum { 746 L2CAP_RX_STATE_RECV, 747 L2CAP_RX_STATE_SREJ_SENT, 748 L2CAP_RX_STATE_MOVE, 749 L2CAP_RX_STATE_WAIT_P, 750 L2CAP_RX_STATE_WAIT_F, 751 }; 752 753 enum { 754 L2CAP_TXSEQ_EXPECTED, 755 L2CAP_TXSEQ_EXPECTED_SREJ, 756 L2CAP_TXSEQ_UNEXPECTED, 757 L2CAP_TXSEQ_UNEXPECTED_SREJ, 758 L2CAP_TXSEQ_DUPLICATE, 759 L2CAP_TXSEQ_DUPLICATE_SREJ, 760 L2CAP_TXSEQ_INVALID, 761 L2CAP_TXSEQ_INVALID_IGNORE, 762 }; 763 764 enum { 765 L2CAP_EV_DATA_REQUEST, 766 L2CAP_EV_LOCAL_BUSY_DETECTED, 767 L2CAP_EV_LOCAL_BUSY_CLEAR, 768 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 769 L2CAP_EV_RECV_FBIT, 770 L2CAP_EV_RETRANS_TO, 771 L2CAP_EV_MONITOR_TO, 772 L2CAP_EV_EXPLICIT_POLL, 773 L2CAP_EV_RECV_IFRAME, 774 L2CAP_EV_RECV_RR, 775 L2CAP_EV_RECV_REJ, 776 L2CAP_EV_RECV_RNR, 777 L2CAP_EV_RECV_SREJ, 778 L2CAP_EV_RECV_FRAME, 779 }; 780 781 enum { 782 L2CAP_MOVE_ROLE_NONE, 783 L2CAP_MOVE_ROLE_INITIATOR, 784 L2CAP_MOVE_ROLE_RESPONDER, 785 }; 786 787 enum { 788 L2CAP_MOVE_STABLE, 789 L2CAP_MOVE_WAIT_REQ, 790 L2CAP_MOVE_WAIT_RSP, 791 L2CAP_MOVE_WAIT_RSP_SUCCESS, 792 L2CAP_MOVE_WAIT_CONFIRM, 793 L2CAP_MOVE_WAIT_CONFIRM_RSP, 794 L2CAP_MOVE_WAIT_LOGICAL_COMP, 795 L2CAP_MOVE_WAIT_LOGICAL_CFM, 796 L2CAP_MOVE_WAIT_LOCAL_BUSY, 797 L2CAP_MOVE_WAIT_PREPARE, 798 }; 799 800 void l2cap_chan_hold(struct l2cap_chan *c); 801 void l2cap_chan_put(struct l2cap_chan *c); 802 803 static inline void l2cap_chan_lock(struct l2cap_chan *chan) 804 { 805 mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting)); 806 } 807 808 static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 809 { 810 mutex_unlock(&chan->lock); 811 } 812 813 static inline void l2cap_set_timer(struct l2cap_chan *chan, 814 struct delayed_work *work, long timeout) 815 { 816 BT_DBG("chan %p state %s timeout %ld", chan, 817 state_to_string(chan->state), timeout); 818 819 /* If delayed work cancelled do not hold(chan) 820 since it is already done with previous set_timer */ 821 if (!cancel_delayed_work(work)) 822 l2cap_chan_hold(chan); 823 824 schedule_delayed_work(work, timeout); 825 } 826 827 static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 828 struct delayed_work *work) 829 { 830 bool ret; 831 832 /* put(chan) if delayed work cancelled otherwise it 833 is done in delayed work function */ 834 ret = cancel_delayed_work(work); 835 if (ret) 836 l2cap_chan_put(chan); 837 838 return ret; 839 } 840 841 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 842 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 843 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 844 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 845 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 846 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 847 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 848 849 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 850 { 851 if (seq1 >= seq2) 852 return seq1 - seq2; 853 else 854 return chan->tx_win_max + 1 - seq2 + seq1; 855 } 856 857 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 858 { 859 return (seq + 1) % (chan->tx_win_max + 1); 860 } 861 862 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 863 { 864 return NULL; 865 } 866 867 static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb) 868 { 869 return -ENOSYS; 870 } 871 872 static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan, 873 unsigned long hdr_len, 874 unsigned long len, int nb) 875 { 876 return ERR_PTR(-ENOSYS); 877 } 878 879 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 880 { 881 } 882 883 static inline void l2cap_chan_no_close(struct l2cap_chan *chan) 884 { 885 } 886 887 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 888 { 889 } 890 891 static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan, 892 int state, int err) 893 { 894 } 895 896 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) 897 { 898 } 899 900 static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan) 901 { 902 } 903 904 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) 905 { 906 } 907 908 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) 909 { 910 } 911 912 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) 913 { 914 return 0; 915 } 916 917 extern bool disable_ertm; 918 919 int l2cap_init_sockets(void); 920 void l2cap_cleanup_sockets(void); 921 bool l2cap_is_socket(struct socket *sock); 922 923 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan); 924 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 925 926 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 927 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 928 929 struct l2cap_chan *l2cap_chan_create(void); 930 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 931 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 932 bdaddr_t *dst, u8 dst_type); 933 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len); 934 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 935 int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator); 936 void l2cap_chan_set_defaults(struct l2cap_chan *chan); 937 int l2cap_ertm_init(struct l2cap_chan *chan); 938 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 939 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 940 void l2cap_chan_del(struct l2cap_chan *chan, int err); 941 void l2cap_send_conn_req(struct l2cap_chan *chan); 942 void l2cap_move_start(struct l2cap_chan *chan); 943 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, 944 u8 status); 945 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result); 946 947 struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn); 948 void l2cap_conn_put(struct l2cap_conn *conn); 949 950 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); 951 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); 952 953 #endif /* __L2CAP_H */ 954