bthidev.c revision 1.15.2.2
1 /* $NetBSD: bthidev.c,v 1.15.2.2 2009/05/16 10:41:19 yamt Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 Itronix Inc. 5 * All rights reserved. 6 * 7 * Written by Iain Hibbert for Itronix Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of Itronix Inc. may not be used to endorse 18 * or promote products derived from this software without specific 19 * prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY 25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 26 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 28 * ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: bthidev.c,v 1.15.2.2 2009/05/16 10:41:19 yamt Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/conf.h> 39 #include <sys/device.h> 40 #include <sys/fcntl.h> 41 #include <sys/kernel.h> 42 #include <sys/queue.h> 43 #include <sys/malloc.h> 44 #include <sys/mbuf.h> 45 #include <sys/proc.h> 46 #include <sys/socketvar.h> 47 #include <sys/systm.h> 48 49 #include <prop/proplib.h> 50 51 #include <netbt/bluetooth.h> 52 #include <netbt/l2cap.h> 53 54 #include <dev/usb/hid.h> 55 #include <dev/bluetooth/btdev.h> 56 #include <dev/bluetooth/bthid.h> 57 #include <dev/bluetooth/bthidev.h> 58 59 #include "locators.h" 60 61 /***************************************************************************** 62 * 63 * Bluetooth HID device 64 */ 65 66 #define MAX_DESCRIPTOR_LEN 1024 /* sanity check */ 67 68 /* bthidev softc */ 69 struct bthidev_softc { 70 uint16_t sc_state; 71 uint16_t sc_flags; 72 device_t sc_dev; 73 74 bdaddr_t sc_laddr; /* local address */ 75 bdaddr_t sc_raddr; /* remote address */ 76 struct sockopt sc_mode; /* link mode sockopt */ 77 78 uint16_t sc_ctlpsm; /* control PSM */ 79 struct l2cap_channel *sc_ctl; /* control channel */ 80 struct l2cap_channel *sc_ctl_l; /* control listen */ 81 82 uint16_t sc_intpsm; /* interrupt PSM */ 83 struct l2cap_channel *sc_int; /* interrupt channel */ 84 struct l2cap_channel *sc_int_l; /* interrupt listen */ 85 86 LIST_HEAD(,bthidev) sc_list; /* child list */ 87 88 callout_t sc_reconnect; 89 int sc_attempts; /* connection attempts */ 90 }; 91 92 /* sc_flags */ 93 #define BTHID_RECONNECT (1 << 0) /* reconnect on link loss */ 94 #define BTHID_CONNECTING (1 << 1) /* we are connecting */ 95 96 /* device state */ 97 #define BTHID_CLOSED 0 98 #define BTHID_WAIT_CTL 1 99 #define BTHID_WAIT_INT 2 100 #define BTHID_OPEN 3 101 102 #define BTHID_RETRY_INTERVAL 5 /* seconds between connection attempts */ 103 104 /* bthidev internals */ 105 static void bthidev_timeout(void *); 106 static int bthidev_listen(struct bthidev_softc *); 107 static int bthidev_connect(struct bthidev_softc *); 108 static int bthidev_output(struct bthidev *, uint8_t *, int); 109 static void bthidev_null(struct bthidev *, uint8_t *, int); 110 111 /* autoconf(9) glue */ 112 static int bthidev_match(device_t, cfdata_t, void *); 113 static void bthidev_attach(device_t, device_t, void *); 114 static int bthidev_detach(device_t, int); 115 static int bthidev_print(void *, const char *); 116 117 CFATTACH_DECL_NEW(bthidev, sizeof(struct bthidev_softc), 118 bthidev_match, bthidev_attach, bthidev_detach, NULL); 119 120 /* bluetooth(9) protocol methods for L2CAP */ 121 static void bthidev_connecting(void *); 122 static void bthidev_ctl_connected(void *); 123 static void bthidev_int_connected(void *); 124 static void bthidev_ctl_disconnected(void *, int); 125 static void bthidev_int_disconnected(void *, int); 126 static void *bthidev_ctl_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *); 127 static void *bthidev_int_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *); 128 static void bthidev_complete(void *, int); 129 static void bthidev_linkmode(void *, int); 130 static void bthidev_input(void *, struct mbuf *); 131 132 static const struct btproto bthidev_ctl_proto = { 133 bthidev_connecting, 134 bthidev_ctl_connected, 135 bthidev_ctl_disconnected, 136 bthidev_ctl_newconn, 137 bthidev_complete, 138 bthidev_linkmode, 139 bthidev_input, 140 }; 141 142 static const struct btproto bthidev_int_proto = { 143 bthidev_connecting, 144 bthidev_int_connected, 145 bthidev_int_disconnected, 146 bthidev_int_newconn, 147 bthidev_complete, 148 bthidev_linkmode, 149 bthidev_input, 150 }; 151 152 /***************************************************************************** 153 * 154 * bthidev autoconf(9) routines 155 */ 156 157 static int 158 bthidev_match(device_t self, cfdata_t cfdata, void *aux) 159 { 160 prop_dictionary_t dict = aux; 161 prop_object_t obj; 162 163 obj = prop_dictionary_get(dict, BTDEVservice); 164 if (prop_string_equals_cstring(obj, "HID")) 165 return 1; 166 167 return 0; 168 } 169 170 static void 171 bthidev_attach(device_t parent, device_t self, void *aux) 172 { 173 struct bthidev_softc *sc = device_private(self); 174 prop_dictionary_t dict = aux; 175 prop_object_t obj; 176 device_t dev; 177 struct bthidev_attach_args bha; 178 struct bthidev *hidev; 179 struct hid_data *d; 180 struct hid_item h; 181 const void *desc; 182 int locs[BTHIDBUSCF_NLOCS]; 183 int maxid, rep, dlen; 184 185 /* 186 * Init softc 187 */ 188 sc->sc_dev = self; 189 LIST_INIT(&sc->sc_list); 190 callout_init(&sc->sc_reconnect, 0); 191 callout_setfunc(&sc->sc_reconnect, bthidev_timeout, sc); 192 sc->sc_state = BTHID_CLOSED; 193 sc->sc_flags = BTHID_CONNECTING; 194 sc->sc_ctlpsm = L2CAP_PSM_HID_CNTL; 195 sc->sc_intpsm = L2CAP_PSM_HID_INTR; 196 197 sockopt_init(&sc->sc_mode, BTPROTO_L2CAP, SO_L2CAP_LM, 0); 198 199 /* 200 * extract config from proplist 201 */ 202 obj = prop_dictionary_get(dict, BTDEVladdr); 203 bdaddr_copy(&sc->sc_laddr, prop_data_data_nocopy(obj)); 204 205 obj = prop_dictionary_get(dict, BTDEVraddr); 206 bdaddr_copy(&sc->sc_raddr, prop_data_data_nocopy(obj)); 207 208 obj = prop_dictionary_get(dict, BTDEVmode); 209 if (prop_object_type(obj) == PROP_TYPE_STRING) { 210 if (prop_string_equals_cstring(obj, BTDEVauth)) 211 sockopt_setint(&sc->sc_mode, L2CAP_LM_AUTH); 212 else if (prop_string_equals_cstring(obj, BTDEVencrypt)) 213 sockopt_setint(&sc->sc_mode, L2CAP_LM_ENCRYPT); 214 else if (prop_string_equals_cstring(obj, BTDEVsecure)) 215 sockopt_setint(&sc->sc_mode, L2CAP_LM_SECURE); 216 else { 217 aprint_error(" unknown %s\n", BTDEVmode); 218 return; 219 } 220 221 aprint_verbose(" %s %s", BTDEVmode, 222 prop_string_cstring_nocopy(obj)); 223 } 224 225 obj = prop_dictionary_get(dict, BTHIDEVcontrolpsm); 226 if (prop_object_type(obj) == PROP_TYPE_NUMBER) { 227 sc->sc_ctlpsm = prop_number_integer_value(obj); 228 if (L2CAP_PSM_INVALID(sc->sc_ctlpsm)) { 229 aprint_error(" invalid %s\n", BTHIDEVcontrolpsm); 230 return; 231 } 232 } 233 234 obj = prop_dictionary_get(dict, BTHIDEVinterruptpsm); 235 if (prop_object_type(obj) == PROP_TYPE_NUMBER) { 236 sc->sc_intpsm = prop_number_integer_value(obj); 237 if (L2CAP_PSM_INVALID(sc->sc_intpsm)) { 238 aprint_error(" invalid %s\n", BTHIDEVinterruptpsm); 239 return; 240 } 241 } 242 243 obj = prop_dictionary_get(dict, BTHIDEVdescriptor); 244 if (prop_object_type(obj) == PROP_TYPE_DATA) { 245 dlen = prop_data_size(obj); 246 desc = prop_data_data_nocopy(obj); 247 } else { 248 aprint_error(" no %s\n", BTHIDEVdescriptor); 249 return; 250 } 251 252 obj = prop_dictionary_get(dict, BTHIDEVreconnect); 253 if (prop_object_type(obj) == PROP_TYPE_BOOL 254 && !prop_bool_true(obj)) 255 sc->sc_flags |= BTHID_RECONNECT; 256 257 /* 258 * Parse the descriptor and attach child devices, one per report. 259 */ 260 maxid = -1; 261 h.report_ID = 0; 262 d = hid_start_parse(desc, dlen, hid_none); 263 while (hid_get_item(d, &h)) { 264 if (h.report_ID > maxid) 265 maxid = h.report_ID; 266 } 267 hid_end_parse(d); 268 269 if (maxid < 0) { 270 aprint_error(" no reports found\n"); 271 return; 272 } 273 274 aprint_normal("\n"); 275 276 for (rep = 0 ; rep <= maxid ; rep++) { 277 if (hid_report_size(desc, dlen, hid_feature, rep) == 0 278 && hid_report_size(desc, dlen, hid_input, rep) == 0 279 && hid_report_size(desc, dlen, hid_output, rep) == 0) 280 continue; 281 282 bha.ba_desc = desc; 283 bha.ba_dlen = dlen; 284 bha.ba_input = bthidev_null; 285 bha.ba_feature = bthidev_null; 286 bha.ba_output = bthidev_output; 287 bha.ba_id = rep; 288 289 locs[BTHIDBUSCF_REPORTID] = rep; 290 291 dev = config_found_sm_loc(self, "bthidbus", 292 locs, &bha, bthidev_print, config_stdsubmatch); 293 if (dev != NULL) { 294 hidev = device_private(dev); 295 hidev->sc_dev = dev; 296 hidev->sc_parent = self; 297 hidev->sc_id = rep; 298 hidev->sc_input = bha.ba_input; 299 hidev->sc_feature = bha.ba_feature; 300 LIST_INSERT_HEAD(&sc->sc_list, hidev, sc_next); 301 } 302 } 303 304 /* 305 * start bluetooth connections 306 */ 307 mutex_enter(bt_lock); 308 if ((sc->sc_flags & BTHID_RECONNECT) == 0) 309 bthidev_listen(sc); 310 311 if (sc->sc_flags & BTHID_CONNECTING) 312 bthidev_connect(sc); 313 mutex_exit(bt_lock); 314 } 315 316 static int 317 bthidev_detach(device_t self, int flags) 318 { 319 struct bthidev_softc *sc = device_private(self); 320 struct bthidev *hidev; 321 322 mutex_enter(bt_lock); 323 sc->sc_flags = 0; /* disable reconnecting */ 324 325 /* release interrupt listen */ 326 if (sc->sc_int_l != NULL) { 327 l2cap_detach(&sc->sc_int_l); 328 sc->sc_int_l = NULL; 329 } 330 331 /* release control listen */ 332 if (sc->sc_ctl_l != NULL) { 333 l2cap_detach(&sc->sc_ctl_l); 334 sc->sc_ctl_l = NULL; 335 } 336 337 /* close interrupt channel */ 338 if (sc->sc_int != NULL) { 339 l2cap_disconnect(sc->sc_int, 0); 340 l2cap_detach(&sc->sc_int); 341 sc->sc_int = NULL; 342 } 343 344 /* close control channel */ 345 if (sc->sc_ctl != NULL) { 346 l2cap_disconnect(sc->sc_ctl, 0); 347 l2cap_detach(&sc->sc_ctl); 348 sc->sc_ctl = NULL; 349 } 350 351 callout_halt(&sc->sc_reconnect, bt_lock); 352 callout_destroy(&sc->sc_reconnect); 353 354 mutex_exit(bt_lock); 355 356 /* detach children */ 357 while ((hidev = LIST_FIRST(&sc->sc_list)) != NULL) { 358 LIST_REMOVE(hidev, sc_next); 359 config_detach(hidev->sc_dev, flags); 360 } 361 362 sockopt_destroy(&sc->sc_mode); 363 364 return 0; 365 } 366 367 /* 368 * bthidev config print 369 */ 370 static int 371 bthidev_print(void *aux, const char *pnp) 372 { 373 struct bthidev_attach_args *ba = aux; 374 375 if (pnp != NULL) 376 aprint_normal("%s:", pnp); 377 378 if (ba->ba_id > 0) 379 aprint_normal(" reportid %d", ba->ba_id); 380 381 return UNCONF; 382 } 383 384 /***************************************************************************** 385 * 386 * bluetooth(4) HID attach/detach routines 387 */ 388 389 /* 390 * callouts are scheduled after connections have been lost, in order 391 * to clean up and reconnect. 392 */ 393 static void 394 bthidev_timeout(void *arg) 395 { 396 struct bthidev_softc *sc = arg; 397 398 mutex_enter(bt_lock); 399 callout_ack(&sc->sc_reconnect); 400 401 switch (sc->sc_state) { 402 case BTHID_CLOSED: 403 if (sc->sc_int != NULL) { 404 l2cap_disconnect(sc->sc_int, 0); 405 break; 406 } 407 408 if (sc->sc_ctl != NULL) { 409 l2cap_disconnect(sc->sc_ctl, 0); 410 break; 411 } 412 413 if (sc->sc_flags & BTHID_RECONNECT) { 414 sc->sc_flags |= BTHID_CONNECTING; 415 bthidev_connect(sc); 416 break; 417 } 418 419 break; 420 421 case BTHID_WAIT_CTL: 422 break; 423 424 case BTHID_WAIT_INT: 425 break; 426 427 case BTHID_OPEN: 428 break; 429 430 default: 431 break; 432 } 433 mutex_exit(bt_lock); 434 } 435 436 /* 437 * listen for our device 438 */ 439 static int 440 bthidev_listen(struct bthidev_softc *sc) 441 { 442 struct sockaddr_bt sa; 443 int err; 444 445 memset(&sa, 0, sizeof(sa)); 446 sa.bt_len = sizeof(sa); 447 sa.bt_family = AF_BLUETOOTH; 448 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); 449 450 /* 451 * Listen on control PSM 452 */ 453 err = l2cap_attach(&sc->sc_ctl_l, &bthidev_ctl_proto, sc); 454 if (err) 455 return err; 456 457 err = l2cap_setopt(sc->sc_ctl_l, &sc->sc_mode); 458 if (err) 459 return err; 460 461 sa.bt_psm = sc->sc_ctlpsm; 462 err = l2cap_bind(sc->sc_ctl_l, &sa); 463 if (err) 464 return err; 465 466 err = l2cap_listen(sc->sc_ctl_l); 467 if (err) 468 return err; 469 470 /* 471 * Listen on interrupt PSM 472 */ 473 err = l2cap_attach(&sc->sc_int_l, &bthidev_int_proto, sc); 474 if (err) 475 return err; 476 477 err = l2cap_setopt(sc->sc_int_l, &sc->sc_mode); 478 if (err) 479 return err; 480 481 sa.bt_psm = sc->sc_intpsm; 482 err = l2cap_bind(sc->sc_int_l, &sa); 483 if (err) 484 return err; 485 486 err = l2cap_listen(sc->sc_int_l); 487 if (err) 488 return err; 489 490 sc->sc_state = BTHID_WAIT_CTL; 491 return 0; 492 } 493 494 /* 495 * start connecting to our device 496 */ 497 static int 498 bthidev_connect(struct bthidev_softc *sc) 499 { 500 struct sockaddr_bt sa; 501 int err; 502 503 if (sc->sc_attempts++ > 0) 504 aprint_verbose_dev(sc->sc_dev, "connect (#%d)\n", sc->sc_attempts); 505 506 memset(&sa, 0, sizeof(sa)); 507 sa.bt_len = sizeof(sa); 508 sa.bt_family = AF_BLUETOOTH; 509 510 err = l2cap_attach(&sc->sc_ctl, &bthidev_ctl_proto, sc); 511 if (err) { 512 aprint_error_dev(sc->sc_dev, "l2cap_attach failed (%d)\n", err); 513 return err; 514 } 515 516 err = l2cap_setopt(sc->sc_ctl, &sc->sc_mode); 517 if (err) 518 return err; 519 520 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); 521 err = l2cap_bind(sc->sc_ctl, &sa); 522 if (err) { 523 aprint_error_dev(sc->sc_dev, "l2cap_bind failed (%d)\n", err); 524 return err; 525 } 526 527 sa.bt_psm = sc->sc_ctlpsm; 528 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_raddr); 529 err = l2cap_connect(sc->sc_ctl, &sa); 530 if (err) { 531 aprint_error_dev(sc->sc_dev, "l2cap_connect failed (%d)\n", err); 532 return err; 533 } 534 535 sc->sc_state = BTHID_WAIT_CTL; 536 return 0; 537 } 538 539 /***************************************************************************** 540 * 541 * bluetooth(9) callback methods for L2CAP 542 * 543 * All these are called from Bluetooth Protocol code, in a soft 544 * interrupt context at IPL_SOFTNET. 545 */ 546 547 static void 548 bthidev_connecting(void *arg) 549 { 550 551 /* dont care */ 552 } 553 554 static void 555 bthidev_ctl_connected(void *arg) 556 { 557 struct sockaddr_bt sa; 558 struct bthidev_softc *sc = arg; 559 int err; 560 561 if (sc->sc_state != BTHID_WAIT_CTL) 562 return; 563 564 KASSERT(sc->sc_ctl != NULL); 565 KASSERT(sc->sc_int == NULL); 566 567 if (sc->sc_flags & BTHID_CONNECTING) { 568 /* initiate connect on interrupt PSM */ 569 err = l2cap_attach(&sc->sc_int, &bthidev_int_proto, sc); 570 if (err) 571 goto fail; 572 573 err = l2cap_setopt(sc->sc_int, &sc->sc_mode); 574 if (err) 575 goto fail; 576 577 memset(&sa, 0, sizeof(sa)); 578 sa.bt_len = sizeof(sa); 579 sa.bt_family = AF_BLUETOOTH; 580 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); 581 582 err = l2cap_bind(sc->sc_int, &sa); 583 if (err) 584 goto fail; 585 586 sa.bt_psm = sc->sc_intpsm; 587 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_raddr); 588 err = l2cap_connect(sc->sc_int, &sa); 589 if (err) 590 goto fail; 591 } 592 593 sc->sc_state = BTHID_WAIT_INT; 594 return; 595 596 fail: 597 l2cap_detach(&sc->sc_ctl); 598 sc->sc_ctl = NULL; 599 600 aprint_error_dev(sc->sc_dev, "connect failed (%d)\n", err); 601 } 602 603 static void 604 bthidev_int_connected(void *arg) 605 { 606 struct bthidev_softc *sc = arg; 607 608 if (sc->sc_state != BTHID_WAIT_INT) 609 return; 610 611 KASSERT(sc->sc_ctl != NULL); 612 KASSERT(sc->sc_int != NULL); 613 614 sc->sc_attempts = 0; 615 sc->sc_flags &= ~BTHID_CONNECTING; 616 sc->sc_state = BTHID_OPEN; 617 618 aprint_normal_dev(sc->sc_dev, "connected\n"); 619 } 620 621 /* 622 * Disconnected 623 * 624 * Depending on our state, this could mean several things, but essentially 625 * we are lost. If both channels are closed, and we are marked to reconnect, 626 * schedule another try otherwise just give up. They will contact us. 627 */ 628 static void 629 bthidev_ctl_disconnected(void *arg, int err) 630 { 631 struct bthidev_softc *sc = arg; 632 633 if (sc->sc_ctl != NULL) { 634 l2cap_detach(&sc->sc_ctl); 635 sc->sc_ctl = NULL; 636 } 637 638 sc->sc_state = BTHID_CLOSED; 639 640 if (sc->sc_int == NULL) { 641 aprint_normal_dev(sc->sc_dev, "disconnected\n"); 642 sc->sc_flags &= ~BTHID_CONNECTING; 643 644 if (sc->sc_flags & BTHID_RECONNECT) 645 callout_schedule(&sc->sc_reconnect, 646 BTHID_RETRY_INTERVAL * hz); 647 else 648 sc->sc_state = BTHID_WAIT_CTL; 649 } else { 650 /* 651 * The interrupt channel should have been closed first, 652 * but its potentially unsafe to detach that from here. 653 * Give them a second to do the right thing or let the 654 * callout handle it. 655 */ 656 callout_schedule(&sc->sc_reconnect, hz); 657 } 658 } 659 660 static void 661 bthidev_int_disconnected(void *arg, int err) 662 { 663 struct bthidev_softc *sc = arg; 664 665 if (sc->sc_int != NULL) { 666 l2cap_detach(&sc->sc_int); 667 sc->sc_int = NULL; 668 } 669 670 sc->sc_state = BTHID_CLOSED; 671 672 if (sc->sc_ctl == NULL) { 673 aprint_normal_dev(sc->sc_dev, "disconnected\n"); 674 sc->sc_flags &= ~BTHID_CONNECTING; 675 676 if (sc->sc_flags & BTHID_RECONNECT) 677 callout_schedule(&sc->sc_reconnect, 678 BTHID_RETRY_INTERVAL * hz); 679 else 680 sc->sc_state = BTHID_WAIT_CTL; 681 } else { 682 /* 683 * The control channel should be closing also, allow 684 * them a chance to do that before we force it. 685 */ 686 callout_schedule(&sc->sc_reconnect, hz); 687 } 688 } 689 690 /* 691 * New Connections 692 * 693 * We give a new L2CAP handle back if this matches the BDADDR we are 694 * listening for and we are in the right state. bthidev_connected will 695 * be called when the connection is open, so nothing else to do here 696 */ 697 static void * 698 bthidev_ctl_newconn(void *arg, struct sockaddr_bt *laddr, 699 struct sockaddr_bt *raddr) 700 { 701 struct bthidev_softc *sc = arg; 702 703 if (bdaddr_same(&raddr->bt_bdaddr, &sc->sc_raddr) == 0 704 || (sc->sc_flags & BTHID_CONNECTING) 705 || sc->sc_state != BTHID_WAIT_CTL 706 || sc->sc_ctl != NULL 707 || sc->sc_int != NULL) 708 return NULL; 709 710 l2cap_attach(&sc->sc_ctl, &bthidev_ctl_proto, sc); 711 return sc->sc_ctl; 712 } 713 714 static void * 715 bthidev_int_newconn(void *arg, struct sockaddr_bt *laddr, 716 struct sockaddr_bt *raddr) 717 { 718 struct bthidev_softc *sc = arg; 719 720 if (bdaddr_same(&raddr->bt_bdaddr, &sc->sc_raddr) == 0 721 || (sc->sc_flags & BTHID_CONNECTING) 722 || sc->sc_state != BTHID_WAIT_INT 723 || sc->sc_ctl == NULL 724 || sc->sc_int != NULL) 725 return NULL; 726 727 l2cap_attach(&sc->sc_int, &bthidev_int_proto, sc); 728 return sc->sc_int; 729 } 730 731 static void 732 bthidev_complete(void *arg, int count) 733 { 734 735 /* dont care */ 736 } 737 738 static void 739 bthidev_linkmode(void *arg, int new) 740 { 741 struct bthidev_softc *sc = arg; 742 int mode; 743 744 (void)sockopt_getint(&sc->sc_mode, &mode); 745 746 if ((mode & L2CAP_LM_AUTH) && !(new & L2CAP_LM_AUTH)) 747 aprint_error_dev(sc->sc_dev, "auth failed\n"); 748 else if ((mode & L2CAP_LM_ENCRYPT) && !(new & L2CAP_LM_ENCRYPT)) 749 aprint_error_dev(sc->sc_dev, "encrypt off\n"); 750 else if ((mode & L2CAP_LM_SECURE) && !(new & L2CAP_LM_SECURE)) 751 aprint_error_dev(sc->sc_dev, "insecure\n"); 752 else 753 return; 754 755 if (sc->sc_int != NULL) 756 l2cap_disconnect(sc->sc_int, 0); 757 758 if (sc->sc_ctl != NULL) 759 l2cap_disconnect(sc->sc_ctl, 0); 760 } 761 762 /* 763 * Receive reports from the protocol stack. 764 */ 765 static void 766 bthidev_input(void *arg, struct mbuf *m) 767 { 768 struct bthidev_softc *sc = arg; 769 struct bthidev *hidev; 770 uint8_t *data; 771 int len; 772 773 if (sc->sc_state != BTHID_OPEN) 774 goto release; 775 776 if (m->m_pkthdr.len > m->m_len) 777 aprint_error_dev(sc->sc_dev, "truncating HID report\n"); 778 779 len = m->m_len; 780 data = mtod(m, uint8_t *); 781 782 if (BTHID_TYPE(data[0]) == BTHID_DATA) { 783 /* 784 * data[0] == type / parameter 785 * data[1] == id 786 * data[2..len] == report 787 */ 788 if (len < 3) 789 goto release; 790 791 LIST_FOREACH(hidev, &sc->sc_list, sc_next) { 792 if (data[1] == hidev->sc_id) { 793 switch (BTHID_DATA_PARAM(data[0])) { 794 case BTHID_DATA_INPUT: 795 (*hidev->sc_input)(hidev, data + 2, len - 2); 796 break; 797 798 case BTHID_DATA_FEATURE: 799 (*hidev->sc_feature)(hidev, data + 2, len - 2); 800 break; 801 802 default: 803 break; 804 } 805 806 goto release; 807 } 808 } 809 aprint_error_dev(sc->sc_dev, "report id %d, len = %d ignored\n", 810 data[1], len - 2); 811 812 goto release; 813 } 814 815 if (BTHID_TYPE(data[0]) == BTHID_CONTROL) { 816 if (len < 1) 817 goto release; 818 819 if (BTHID_DATA_PARAM(data[0]) == BTHID_CONTROL_UNPLUG) { 820 aprint_normal_dev(sc->sc_dev, "unplugged\n"); 821 822 /* close interrupt channel */ 823 if (sc->sc_int != NULL) { 824 l2cap_disconnect(sc->sc_int, 0); 825 l2cap_detach(&sc->sc_int); 826 sc->sc_int = NULL; 827 } 828 829 /* close control channel */ 830 if (sc->sc_ctl != NULL) { 831 l2cap_disconnect(sc->sc_ctl, 0); 832 l2cap_detach(&sc->sc_ctl); 833 sc->sc_ctl = NULL; 834 } 835 } 836 837 goto release; 838 } 839 840 release: 841 m_freem(m); 842 } 843 844 /***************************************************************************** 845 * 846 * IO routines 847 */ 848 849 static void 850 bthidev_null(struct bthidev *hidev, uint8_t *report, int len) 851 { 852 853 /* 854 * empty routine just in case the device 855 * provided no method to handle this report 856 */ 857 } 858 859 static int 860 bthidev_output(struct bthidev *hidev, uint8_t *report, int rlen) 861 { 862 struct bthidev_softc *sc = device_private(hidev->sc_parent); 863 struct mbuf *m; 864 int err; 865 866 if (sc == NULL || sc->sc_state != BTHID_OPEN) 867 return ENOTCONN; 868 869 KASSERT(sc->sc_ctl != NULL); 870 KASSERT(sc->sc_int != NULL); 871 872 if (rlen == 0 || report == NULL) 873 return 0; 874 875 if (rlen > MHLEN - 2) { 876 aprint_error_dev(sc->sc_dev, 877 "output report too long (%d)!\n", rlen); 878 return EMSGSIZE; 879 } 880 881 m = m_gethdr(M_DONTWAIT, MT_DATA); 882 if (m == NULL) 883 return ENOMEM; 884 885 /* 886 * data[0] = type / parameter 887 * data[1] = id 888 * data[2..N] = report 889 */ 890 mtod(m, uint8_t *)[0] = (uint8_t)((BTHID_DATA << 4) | BTHID_DATA_OUTPUT); 891 mtod(m, uint8_t *)[1] = hidev->sc_id; 892 memcpy(mtod(m, uint8_t *) + 2, report, rlen); 893 m->m_pkthdr.len = m->m_len = rlen + 2; 894 895 mutex_enter(bt_lock); 896 err = l2cap_send(sc->sc_int, m); 897 mutex_exit(bt_lock); 898 899 return err; 900 } 901
Indexes created Wed Oct 01 18:09:54 GMT 2025