hci_socket.c revision 1.32
1 /* $NetBSD: hci_socket.c,v 1.32 2014/07/09 14:41:42 rtr Exp $ */ 2 3 /*- 4 * Copyright (c) 2005 Iain Hibbert. 5 * Copyright (c) 2006 Itronix Inc. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of Itronix Inc. may not be used to endorse 17 * or promote products derived from this software without specific 18 * prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY 24 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 25 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 27 * ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: hci_socket.c,v 1.32 2014/07/09 14:41:42 rtr Exp $"); 35 36 /* load symbolic names */ 37 #ifdef BLUETOOTH_DEBUG 38 #define PRUREQUESTS 39 #define PRCOREQUESTS 40 #endif 41 42 #include <sys/param.h> 43 #include <sys/domain.h> 44 #include <sys/kauth.h> 45 #include <sys/kernel.h> 46 #include <sys/kmem.h> 47 #include <sys/mbuf.h> 48 #include <sys/proc.h> 49 #include <sys/protosw.h> 50 #include <sys/socket.h> 51 #include <sys/socketvar.h> 52 #include <sys/systm.h> 53 54 #include <netbt/bluetooth.h> 55 #include <netbt/hci.h> 56 57 /******************************************************************************* 58 * 59 * HCI SOCK_RAW Sockets - for control of Bluetooth Devices 60 * 61 */ 62 63 /* 64 * the raw HCI protocol control block 65 */ 66 struct hci_pcb { 67 struct socket *hp_socket; /* socket */ 68 kauth_cred_t hp_cred; /* owner credential */ 69 unsigned int hp_flags; /* flags */ 70 bdaddr_t hp_laddr; /* local address */ 71 bdaddr_t hp_raddr; /* remote address */ 72 struct hci_filter hp_efilter; /* user event filter */ 73 struct hci_filter hp_pfilter; /* user packet filter */ 74 LIST_ENTRY(hci_pcb) hp_next; /* next HCI pcb */ 75 }; 76 77 /* hp_flags */ 78 #define HCI_DIRECTION (1<<1) /* direction control messages */ 79 #define HCI_PROMISCUOUS (1<<2) /* listen to all units */ 80 81 LIST_HEAD(hci_pcb_list, hci_pcb) hci_pcb = LIST_HEAD_INITIALIZER(hci_pcb); 82 83 /* sysctl defaults */ 84 int hci_sendspace = HCI_CMD_PKT_SIZE; 85 int hci_recvspace = 4096; 86 87 /* unprivileged commands opcode table */ 88 static const struct { 89 uint16_t opcode; 90 uint8_t offs; /* 0 - 63 */ 91 uint8_t mask; /* bit 0 - 7 */ 92 uint8_t length; /* approved length */ 93 } hci_cmds[] = { 94 { HCI_CMD_INQUIRY, 95 0, 0x01, sizeof(hci_inquiry_cp) }, 96 { HCI_CMD_REMOTE_NAME_REQ, 97 2, 0x08, sizeof(hci_remote_name_req_cp) }, 98 { HCI_CMD_READ_REMOTE_FEATURES, 99 2, 0x20, sizeof(hci_read_remote_features_cp) }, 100 { HCI_CMD_READ_REMOTE_EXTENDED_FEATURES, 101 2, 0x40, sizeof(hci_read_remote_extended_features_cp) }, 102 { HCI_CMD_READ_REMOTE_VER_INFO, 103 2, 0x80, sizeof(hci_read_remote_ver_info_cp) }, 104 { HCI_CMD_READ_CLOCK_OFFSET, 105 3, 0x01, sizeof(hci_read_clock_offset_cp) }, 106 { HCI_CMD_READ_LMP_HANDLE, 107 3, 0x02, sizeof(hci_read_lmp_handle_cp) }, 108 { HCI_CMD_ROLE_DISCOVERY, 109 4, 0x80, sizeof(hci_role_discovery_cp) }, 110 { HCI_CMD_READ_LINK_POLICY_SETTINGS, 111 5, 0x02, sizeof(hci_read_link_policy_settings_cp) }, 112 { HCI_CMD_READ_DEFAULT_LINK_POLICY_SETTINGS, 113 5, 0x08, 0 }, 114 { HCI_CMD_READ_PIN_TYPE, 115 6, 0x04, 0 }, 116 { HCI_CMD_READ_LOCAL_NAME, 117 7, 0x02, 0 }, 118 { HCI_CMD_READ_CON_ACCEPT_TIMEOUT, 119 7, 0x04, 0 }, 120 { HCI_CMD_READ_PAGE_TIMEOUT, 121 7, 0x10, 0 }, 122 { HCI_CMD_READ_SCAN_ENABLE, 123 7, 0x40, 0 }, 124 { HCI_CMD_READ_PAGE_SCAN_ACTIVITY, 125 8, 0x01, 0 }, 126 { HCI_CMD_READ_INQUIRY_SCAN_ACTIVITY, 127 8, 0x04, 0 }, 128 { HCI_CMD_READ_AUTH_ENABLE, 129 8, 0x10, 0 }, 130 { HCI_CMD_READ_ENCRYPTION_MODE, 131 8, 0x40, 0 }, 132 { HCI_CMD_READ_UNIT_CLASS, 133 9, 0x01, 0 }, 134 { HCI_CMD_READ_VOICE_SETTING, 135 9, 0x04, 0 }, 136 { HCI_CMD_READ_AUTO_FLUSH_TIMEOUT, 137 9, 0x10, sizeof(hci_read_auto_flush_timeout_cp) }, 138 { HCI_CMD_READ_NUM_BROADCAST_RETRANS, 139 9, 0x40, 0 }, 140 { HCI_CMD_READ_HOLD_MODE_ACTIVITY, 141 10, 0x01, 0 }, 142 { HCI_CMD_READ_XMIT_LEVEL, 143 10, 0x04, sizeof(hci_read_xmit_level_cp) }, 144 { HCI_CMD_READ_SCO_FLOW_CONTROL, 145 10, 0x08, 0 }, 146 { HCI_CMD_READ_LINK_SUPERVISION_TIMEOUT, 147 11, 0x01, sizeof(hci_read_link_supervision_timeout_cp) }, 148 { HCI_CMD_READ_NUM_SUPPORTED_IAC, 149 11, 0x04, 0 }, 150 { HCI_CMD_READ_IAC_LAP, 151 11, 0x08, 0 }, 152 { HCI_CMD_READ_PAGE_SCAN_PERIOD, 153 11, 0x20, 0 }, 154 { HCI_CMD_READ_PAGE_SCAN, 155 11, 0x80, 0 }, 156 { HCI_CMD_READ_INQUIRY_SCAN_TYPE, 157 12, 0x10, 0 }, 158 { HCI_CMD_READ_INQUIRY_MODE, 159 12, 0x40, 0 }, 160 { HCI_CMD_READ_PAGE_SCAN_TYPE, 161 13, 0x01, 0 }, 162 { HCI_CMD_READ_AFH_ASSESSMENT, 163 13, 0x04, 0 }, 164 { HCI_CMD_READ_LOCAL_VER, 165 14, 0x08, 0 }, 166 { HCI_CMD_READ_LOCAL_COMMANDS, 167 14, 0x10, 0 }, 168 { HCI_CMD_READ_LOCAL_FEATURES, 169 14, 0x20, 0 }, 170 { HCI_CMD_READ_LOCAL_EXTENDED_FEATURES, 171 14, 0x40, sizeof(hci_read_local_extended_features_cp) }, 172 { HCI_CMD_READ_BUFFER_SIZE, 173 14, 0x80, 0 }, 174 { HCI_CMD_READ_COUNTRY_CODE, 175 15, 0x01, 0 }, 176 { HCI_CMD_READ_BDADDR, 177 15, 0x02, 0 }, 178 { HCI_CMD_READ_FAILED_CONTACT_CNTR, 179 15, 0x04, sizeof(hci_read_failed_contact_cntr_cp) }, 180 { HCI_CMD_READ_LINK_QUALITY, 181 15, 0x10, sizeof(hci_read_link_quality_cp) }, 182 { HCI_CMD_READ_RSSI, 183 15, 0x20, sizeof(hci_read_rssi_cp) }, 184 { HCI_CMD_READ_AFH_CHANNEL_MAP, 185 15, 0x40, sizeof(hci_read_afh_channel_map_cp) }, 186 { HCI_CMD_READ_CLOCK, 187 15, 0x80, sizeof(hci_read_clock_cp) }, 188 { HCI_CMD_READ_LOOPBACK_MODE, 189 16, 0x01, 0 }, 190 { HCI_CMD_READ_EXTENDED_INQUIRY_RSP, 191 17, 0x01, 0 }, 192 { HCI_CMD_READ_SIMPLE_PAIRING_MODE, 193 17, 0x20, 0 }, 194 { HCI_CMD_READ_INQUIRY_RSP_XMIT_POWER, 195 18, 0x01, 0 }, 196 { HCI_CMD_READ_DEFAULT_ERRDATA_REPORTING, 197 18, 0x04, 0 }, 198 }; 199 200 /* 201 * supply a basic device send/recv policy 202 */ 203 static int 204 hci_device_cb(kauth_cred_t cred, kauth_action_t action, void *cookie, 205 void *arg0, void *arg1, void *arg2, void *arg3) 206 { 207 int i, result; 208 209 result = KAUTH_RESULT_DEFER; 210 211 switch (action) { 212 case KAUTH_DEVICE_BLUETOOTH_SEND: { 213 struct hci_unit *unit = (struct hci_unit *)arg0; 214 hci_cmd_hdr_t *hdr = (hci_cmd_hdr_t *)arg1; 215 216 /* 217 * Allow sending unprivileged commands if the packet size 218 * is correct and the unit claims to support it 219 */ 220 221 if (hdr->type != HCI_CMD_PKT) 222 break; 223 224 for (i = 0; i < __arraycount(hci_cmds); i++) { 225 if (hdr->opcode == hci_cmds[i].opcode 226 && hdr->length == hci_cmds[i].length 227 && (unit->hci_cmds[hci_cmds[i].offs] & hci_cmds[i].mask)) { 228 result = KAUTH_RESULT_ALLOW; 229 break; 230 } 231 } 232 233 break; 234 } 235 236 case KAUTH_DEVICE_BLUETOOTH_RECV: 237 switch((uint8_t)(uintptr_t)arg0) { 238 case HCI_CMD_PKT: { 239 uint16_t opcode = (uint16_t)(uintptr_t)arg1; 240 241 /* 242 * Allow to see any unprivileged command packet 243 */ 244 245 for (i = 0; i < __arraycount(hci_cmds); i++) { 246 if (opcode == hci_cmds[i].opcode) { 247 result = KAUTH_RESULT_ALLOW; 248 break; 249 } 250 } 251 252 break; 253 } 254 255 case HCI_EVENT_PKT: { 256 uint8_t event = (uint8_t)(uintptr_t)arg1; 257 258 /* 259 * Allow to receive most events 260 */ 261 262 switch (event) { 263 case HCI_EVENT_RETURN_LINK_KEYS: 264 case HCI_EVENT_LINK_KEY_NOTIFICATION: 265 case HCI_EVENT_USER_CONFIRM_REQ: 266 case HCI_EVENT_USER_PASSKEY_NOTIFICATION: 267 case HCI_EVENT_VENDOR: 268 break; 269 270 default: 271 result = KAUTH_RESULT_ALLOW; 272 break; 273 } 274 275 break; 276 } 277 278 case HCI_ACL_DATA_PKT: 279 case HCI_SCO_DATA_PKT: { 280 /* uint16_t handle = (uint16_t)(uintptr_t)arg1; */ 281 /* 282 * don't normally allow receiving data packets 283 */ 284 break; 285 } 286 287 default: 288 break; 289 } 290 291 break; 292 293 default: 294 break; 295 } 296 297 return result; 298 } 299 300 /* 301 * HCI protocol init routine, 302 * - set up a kauth listener to provide basic packet access policy 303 */ 304 void 305 hci_init(void) 306 { 307 308 if (kauth_listen_scope(KAUTH_SCOPE_DEVICE, hci_device_cb, NULL) == NULL) 309 panic("Bluetooth HCI: cannot listen on device scope"); 310 } 311 312 /* 313 * When command packet reaches the device, we can drop 314 * it from the socket buffer (called from hci_output_acl) 315 */ 316 void 317 hci_drop(void *arg) 318 { 319 struct socket *so = arg; 320 321 sbdroprecord(&so->so_snd); 322 sowwakeup(so); 323 } 324 325 /* 326 * HCI socket is going away and has some pending packets. We let them 327 * go by design, but remove the context pointer as it will be invalid 328 * and we no longer need to be notified. 329 */ 330 static void 331 hci_cmdwait_flush(struct socket *so) 332 { 333 struct hci_unit *unit; 334 struct socket *ctx; 335 struct mbuf *m; 336 337 DPRINTF("flushing %p\n", so); 338 339 SIMPLEQ_FOREACH(unit, &hci_unit_list, hci_next) { 340 m = MBUFQ_FIRST(&unit->hci_cmdwait); 341 while (m != NULL) { 342 ctx = M_GETCTX(m, struct socket *); 343 if (ctx == so) 344 M_SETCTX(m, NULL); 345 346 m = MBUFQ_NEXT(m); 347 } 348 } 349 } 350 351 /* 352 * HCI send packet 353 * This came from userland, so check it out. 354 */ 355 static int 356 hci_send(struct hci_pcb *pcb, struct mbuf *m, bdaddr_t *addr) 357 { 358 struct hci_unit *unit; 359 struct mbuf *m0; 360 hci_cmd_hdr_t hdr; 361 int err; 362 363 KASSERT(m != NULL); 364 KASSERT(addr != NULL); 365 366 /* wants at least a header to start with */ 367 if (m->m_pkthdr.len < sizeof(hdr)) { 368 err = EMSGSIZE; 369 goto bad; 370 } 371 m_copydata(m, 0, sizeof(hdr), &hdr); 372 hdr.opcode = le16toh(hdr.opcode); 373 374 /* only allows CMD packets to be sent */ 375 if (hdr.type != HCI_CMD_PKT) { 376 err = EINVAL; 377 goto bad; 378 } 379 380 /* validates packet length */ 381 if (m->m_pkthdr.len != sizeof(hdr) + hdr.length) { 382 err = EMSGSIZE; 383 goto bad; 384 } 385 386 /* finds destination */ 387 unit = hci_unit_lookup(addr); 388 if (unit == NULL) { 389 err = ENETDOWN; 390 goto bad; 391 } 392 393 /* security checks for unprivileged users */ 394 if (pcb->hp_cred != NULL 395 && kauth_authorize_device(pcb->hp_cred, 396 KAUTH_DEVICE_BLUETOOTH_SEND, 397 unit, &hdr, NULL, NULL) != 0) { 398 err = EPERM; 399 goto bad; 400 } 401 402 /* makess a copy for precious to keep */ 403 m0 = m_copypacket(m, M_DONTWAIT); 404 if (m0 == NULL) { 405 err = ENOMEM; 406 goto bad; 407 } 408 sbappendrecord(&pcb->hp_socket->so_snd, m0); 409 M_SETCTX(m, pcb->hp_socket); /* enable drop callback */ 410 411 DPRINTFN(2, "(%s) opcode (%03x|%04x)\n", device_xname(unit->hci_dev), 412 HCI_OGF(hdr.opcode), HCI_OCF(hdr.opcode)); 413 414 /* Sendss it */ 415 if (unit->hci_num_cmd_pkts == 0) 416 MBUFQ_ENQUEUE(&unit->hci_cmdwait, m); 417 else 418 hci_output_cmd(unit, m); 419 420 return 0; 421 422 bad: 423 DPRINTF("packet (%d bytes) not sent (error %d)\n", 424 m->m_pkthdr.len, err); 425 if (m) m_freem(m); 426 return err; 427 } 428 429 static int 430 hci_attach(struct socket *so, int proto) 431 { 432 struct hci_pcb *pcb; 433 int error; 434 435 KASSERT(so->so_pcb == NULL); 436 437 if (so->so_lock == NULL) { 438 mutex_obj_hold(bt_lock); 439 so->so_lock = bt_lock; 440 solock(so); 441 } 442 KASSERT(solocked(so)); 443 444 error = soreserve(so, hci_sendspace, hci_recvspace); 445 if (error) { 446 return error; 447 } 448 449 pcb = kmem_zalloc(sizeof(struct hci_pcb), KM_SLEEP); 450 pcb->hp_cred = kauth_cred_dup(curlwp->l_cred); 451 pcb->hp_socket = so; 452 453 /* 454 * Set default user filter. By default, socket only passes 455 * Command_Complete and Command_Status Events. 456 */ 457 hci_filter_set(HCI_EVENT_COMMAND_COMPL, &pcb->hp_efilter); 458 hci_filter_set(HCI_EVENT_COMMAND_STATUS, &pcb->hp_efilter); 459 hci_filter_set(HCI_EVENT_PKT, &pcb->hp_pfilter); 460 461 LIST_INSERT_HEAD(&hci_pcb, pcb, hp_next); 462 so->so_pcb = pcb; 463 464 return 0; 465 } 466 467 static void 468 hci_detach(struct socket *so) 469 { 470 struct hci_pcb *pcb; 471 472 pcb = (struct hci_pcb *)so->so_pcb; 473 KASSERT(pcb != NULL); 474 475 if (so->so_snd.sb_mb != NULL) 476 hci_cmdwait_flush(so); 477 478 if (pcb->hp_cred != NULL) 479 kauth_cred_free(pcb->hp_cred); 480 481 so->so_pcb = NULL; 482 LIST_REMOVE(pcb, hp_next); 483 kmem_free(pcb, sizeof(*pcb)); 484 } 485 486 static int 487 hci_accept(struct socket *so, struct mbuf *nam) 488 { 489 KASSERT(solocked(so)); 490 491 return EOPNOTSUPP; 492 } 493 494 static int 495 hci_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 496 { 497 int err; 498 mutex_enter(bt_lock); 499 err = hci_ioctl_pcb(cmd, nam); 500 mutex_exit(bt_lock); 501 return err; 502 } 503 504 static int 505 hci_stat(struct socket *so, struct stat *ub) 506 { 507 KASSERT(solocked(so)); 508 509 return 0; 510 } 511 512 static int 513 hci_peeraddr(struct socket *so, struct mbuf *nam) 514 { 515 struct hci_pcb *pcb = (struct hci_pcb *)so->so_pcb; 516 struct sockaddr_bt *sa; 517 518 KASSERT(solocked(so)); 519 KASSERT(pcb != NULL); 520 KASSERT(nam != NULL); 521 522 sa = mtod(nam, struct sockaddr_bt *); 523 memset(sa, 0, sizeof(struct sockaddr_bt)); 524 nam->m_len = 525 sa->bt_len = sizeof(struct sockaddr_bt); 526 sa->bt_family = AF_BLUETOOTH; 527 bdaddr_copy(&sa->bt_bdaddr, &pcb->hp_raddr); 528 return 0; 529 } 530 531 static int 532 hci_sockaddr(struct socket *so, struct mbuf *nam) 533 { 534 struct hci_pcb *pcb = (struct hci_pcb *)so->so_pcb; 535 struct sockaddr_bt *sa; 536 537 KASSERT(solocked(so)); 538 KASSERT(pcb != NULL); 539 KASSERT(nam != NULL); 540 541 sa = mtod(nam, struct sockaddr_bt *); 542 memset(sa, 0, sizeof(struct sockaddr_bt)); 543 nam->m_len = 544 sa->bt_len = sizeof(struct sockaddr_bt); 545 sa->bt_family = AF_BLUETOOTH; 546 bdaddr_copy(&sa->bt_bdaddr, &pcb->hp_laddr); 547 return 0; 548 } 549 550 /* 551 * User Request. 552 * up is socket 553 * m is optional mbuf chain containing message 554 * nam is optional mbuf chain containing an address 555 * ctl is optional mbuf chain containing socket options 556 * l is pointer to process requesting action (if any) 557 * 558 * we are responsible for disposing of m and ctl 559 */ 560 static int 561 hci_usrreq(struct socket *up, int req, struct mbuf *m, 562 struct mbuf *nam, struct mbuf *ctl, struct lwp *l) 563 { 564 struct hci_pcb *pcb = (struct hci_pcb *)up->so_pcb; 565 struct sockaddr_bt *sa; 566 int err = 0; 567 568 DPRINTFN(2, "%s\n", prurequests[req]); 569 KASSERT(req != PRU_ATTACH); 570 KASSERT(req != PRU_DETACH); 571 KASSERT(req != PRU_ACCEPT); 572 KASSERT(req != PRU_CONTROL); 573 KASSERT(req != PRU_SENSE); 574 KASSERT(req != PRU_PEERADDR); 575 KASSERT(req != PRU_SOCKADDR); 576 577 switch(req) { 578 case PRU_PURGEIF: 579 return EOPNOTSUPP; 580 } 581 582 /* anything after here *requires* a pcb */ 583 if (pcb == NULL) { 584 err = EINVAL; 585 goto release; 586 } 587 588 switch(req) { 589 case PRU_DISCONNECT: 590 bdaddr_copy(&pcb->hp_raddr, BDADDR_ANY); 591 592 /* XXX we cannot call soisdisconnected() here, as it sets 593 * SS_CANTRCVMORE and SS_CANTSENDMORE. The problem being, 594 * that soisconnected() does not clear these and if you 595 * try to reconnect this socket (which is permitted) you 596 * get a broken pipe when you try to write any data. 597 */ 598 up->so_state &= ~SS_ISCONNECTED; 599 break; 600 601 case PRU_ABORT: 602 soisdisconnected(up); 603 hci_detach(up); 604 return 0; 605 606 case PRU_BIND: 607 KASSERT(nam != NULL); 608 sa = mtod(nam, struct sockaddr_bt *); 609 610 if (sa->bt_len != sizeof(struct sockaddr_bt)) 611 return EINVAL; 612 613 if (sa->bt_family != AF_BLUETOOTH) 614 return EAFNOSUPPORT; 615 616 bdaddr_copy(&pcb->hp_laddr, &sa->bt_bdaddr); 617 618 if (bdaddr_any(&sa->bt_bdaddr)) 619 pcb->hp_flags |= HCI_PROMISCUOUS; 620 else 621 pcb->hp_flags &= ~HCI_PROMISCUOUS; 622 623 return 0; 624 625 case PRU_CONNECT: 626 KASSERT(nam != NULL); 627 sa = mtod(nam, struct sockaddr_bt *); 628 629 if (sa->bt_len != sizeof(struct sockaddr_bt)) 630 return EINVAL; 631 632 if (sa->bt_family != AF_BLUETOOTH) 633 return EAFNOSUPPORT; 634 635 if (hci_unit_lookup(&sa->bt_bdaddr) == NULL) 636 return EADDRNOTAVAIL; 637 638 bdaddr_copy(&pcb->hp_raddr, &sa->bt_bdaddr); 639 soisconnected(up); 640 return 0; 641 642 case PRU_SHUTDOWN: 643 socantsendmore(up); 644 break; 645 646 case PRU_SEND: 647 sa = NULL; 648 if (nam) { 649 sa = mtod(nam, struct sockaddr_bt *); 650 651 if (sa->bt_len != sizeof(struct sockaddr_bt)) { 652 err = EINVAL; 653 goto release; 654 } 655 656 if (sa->bt_family != AF_BLUETOOTH) { 657 err = EAFNOSUPPORT; 658 goto release; 659 } 660 } 661 662 if (ctl) /* have no use for this */ 663 m_freem(ctl); 664 665 return hci_send(pcb, m, (sa ? &sa->bt_bdaddr : &pcb->hp_raddr)); 666 667 case PRU_RCVD: 668 case PRU_RCVOOB: 669 return EOPNOTSUPP; /* (no release) */ 670 671 case PRU_CONNECT2: 672 case PRU_LISTEN: 673 case PRU_SENDOOB: 674 case PRU_FASTTIMO: 675 case PRU_SLOWTIMO: 676 case PRU_PROTORCV: 677 case PRU_PROTOSEND: 678 err = EOPNOTSUPP; 679 break; 680 681 default: 682 UNKNOWN(req); 683 err = EOPNOTSUPP; 684 break; 685 } 686 687 release: 688 if (m) 689 m_freem(m); 690 if (ctl) 691 m_freem(ctl); 692 return err; 693 } 694 695 /* 696 * get/set socket options 697 */ 698 int 699 hci_ctloutput(int req, struct socket *so, struct sockopt *sopt) 700 { 701 struct hci_pcb *pcb = (struct hci_pcb *)so->so_pcb; 702 int optval, err = 0; 703 704 DPRINTFN(2, "req %s\n", prcorequests[req]); 705 706 if (pcb == NULL) 707 return EINVAL; 708 709 if (sopt->sopt_level != BTPROTO_HCI) 710 return ENOPROTOOPT; 711 712 switch(req) { 713 case PRCO_GETOPT: 714 switch (sopt->sopt_name) { 715 case SO_HCI_EVT_FILTER: 716 err = sockopt_set(sopt, &pcb->hp_efilter, 717 sizeof(struct hci_filter)); 718 719 break; 720 721 case SO_HCI_PKT_FILTER: 722 err = sockopt_set(sopt, &pcb->hp_pfilter, 723 sizeof(struct hci_filter)); 724 725 break; 726 727 case SO_HCI_DIRECTION: 728 err = sockopt_setint(sopt, 729 (pcb->hp_flags & HCI_DIRECTION ? 1 : 0)); 730 731 break; 732 733 default: 734 err = ENOPROTOOPT; 735 break; 736 } 737 break; 738 739 case PRCO_SETOPT: 740 switch (sopt->sopt_name) { 741 case SO_HCI_EVT_FILTER: /* set event filter */ 742 err = sockopt_get(sopt, &pcb->hp_efilter, 743 sizeof(pcb->hp_efilter)); 744 745 break; 746 747 case SO_HCI_PKT_FILTER: /* set packet filter */ 748 err = sockopt_get(sopt, &pcb->hp_pfilter, 749 sizeof(pcb->hp_pfilter)); 750 751 break; 752 753 case SO_HCI_DIRECTION: /* request direction ctl messages */ 754 err = sockopt_getint(sopt, &optval); 755 if (err) 756 break; 757 758 if (optval) 759 pcb->hp_flags |= HCI_DIRECTION; 760 else 761 pcb->hp_flags &= ~HCI_DIRECTION; 762 break; 763 764 default: 765 err = ENOPROTOOPT; 766 break; 767 } 768 break; 769 770 default: 771 err = ENOPROTOOPT; 772 break; 773 } 774 775 return err; 776 } 777 778 /* 779 * HCI mbuf tap routine 780 * 781 * copy packets to any raw HCI sockets that wish (and are 782 * permitted) to see them 783 */ 784 void 785 hci_mtap(struct mbuf *m, struct hci_unit *unit) 786 { 787 struct hci_pcb *pcb; 788 struct mbuf *m0, *ctlmsg, **ctl; 789 struct sockaddr_bt sa; 790 uint8_t type; 791 uint8_t event; 792 uint16_t arg1; 793 794 KASSERT(m->m_len >= sizeof(type)); 795 796 type = *mtod(m, uint8_t *); 797 798 memset(&sa, 0, sizeof(sa)); 799 sa.bt_len = sizeof(struct sockaddr_bt); 800 sa.bt_family = AF_BLUETOOTH; 801 bdaddr_copy(&sa.bt_bdaddr, &unit->hci_bdaddr); 802 803 LIST_FOREACH(pcb, &hci_pcb, hp_next) { 804 /* 805 * filter according to source address 806 */ 807 if ((pcb->hp_flags & HCI_PROMISCUOUS) == 0 808 && bdaddr_same(&pcb->hp_laddr, &sa.bt_bdaddr) == 0) 809 continue; 810 811 /* 812 * filter according to packet type filter 813 */ 814 if (hci_filter_test(type, &pcb->hp_pfilter) == 0) 815 continue; 816 817 /* 818 * filter according to event/security filters 819 */ 820 switch(type) { 821 case HCI_EVENT_PKT: 822 KASSERT(m->m_len >= sizeof(hci_event_hdr_t)); 823 824 event = mtod(m, hci_event_hdr_t *)->event; 825 826 if (hci_filter_test(event, &pcb->hp_efilter) == 0) 827 continue; 828 829 arg1 = event; 830 break; 831 832 case HCI_CMD_PKT: 833 KASSERT(m->m_len >= sizeof(hci_cmd_hdr_t)); 834 arg1 = le16toh(mtod(m, hci_cmd_hdr_t *)->opcode); 835 break; 836 837 case HCI_ACL_DATA_PKT: 838 KASSERT(m->m_len >= sizeof(hci_acldata_hdr_t)); 839 arg1 = le16toh(mtod(m, hci_acldata_hdr_t *)->con_handle); 840 arg1 = HCI_CON_HANDLE(arg1); 841 break; 842 843 case HCI_SCO_DATA_PKT: 844 KASSERT(m->m_len >= sizeof(hci_scodata_hdr_t)); 845 arg1 = le16toh(mtod(m, hci_scodata_hdr_t *)->con_handle); 846 arg1 = HCI_CON_HANDLE(arg1); 847 break; 848 849 default: 850 arg1 = 0; 851 break; 852 } 853 854 if (pcb->hp_cred != NULL 855 && kauth_authorize_device(pcb->hp_cred, 856 KAUTH_DEVICE_BLUETOOTH_RECV, 857 KAUTH_ARG(type), KAUTH_ARG(arg1), NULL, NULL) != 0) 858 continue; 859 860 /* 861 * create control messages 862 */ 863 ctlmsg = NULL; 864 ctl = &ctlmsg; 865 if (pcb->hp_flags & HCI_DIRECTION) { 866 int dir = m->m_flags & M_LINK0 ? 1 : 0; 867 868 *ctl = sbcreatecontrol(&dir, sizeof(dir), 869 SCM_HCI_DIRECTION, BTPROTO_HCI); 870 871 if (*ctl != NULL) 872 ctl = &((*ctl)->m_next); 873 } 874 if (pcb->hp_socket->so_options & SO_TIMESTAMP) { 875 struct timeval tv; 876 877 microtime(&tv); 878 *ctl = sbcreatecontrol(&tv, sizeof(tv), 879 SCM_TIMESTAMP, SOL_SOCKET); 880 881 if (*ctl != NULL) 882 ctl = &((*ctl)->m_next); 883 } 884 885 /* 886 * copy to socket 887 */ 888 m0 = m_copypacket(m, M_DONTWAIT); 889 if (m0 && sbappendaddr(&pcb->hp_socket->so_rcv, 890 (struct sockaddr *)&sa, m0, ctlmsg)) { 891 sorwakeup(pcb->hp_socket); 892 } else { 893 m_freem(ctlmsg); 894 m_freem(m0); 895 } 896 } 897 } 898 899 PR_WRAP_USRREQS(hci) 900 901 #define hci_attach hci_attach_wrapper 902 #define hci_detach hci_detach_wrapper 903 #define hci_accept hci_accept_wrapper 904 #define hci_ioctl hci_ioctl_wrapper 905 #define hci_stat hci_stat_wrapper 906 #define hci_peeraddr hci_peeraddr_wrapper 907 #define hci_sockaddr hci_sockaddr_wrapper 908 #define hci_usrreq hci_usrreq_wrapper 909 910 const struct pr_usrreqs hci_usrreqs = { 911 .pr_attach = hci_attach, 912 .pr_detach = hci_detach, 913 .pr_accept = hci_accept, 914 .pr_ioctl = hci_ioctl, 915 .pr_stat = hci_stat, 916 .pr_peeraddr = hci_peeraddr, 917 .pr_sockaddr = hci_sockaddr, 918 .pr_generic = hci_usrreq, 919 }; 920
Indexes created Sat Sep 27 14:09:57 GMT 2025