1 /* $NetBSD: hci_socket.c,v 1.45 2015/12/22 11:40:07 plunky 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 1.45 2015/12/22 11:40:07 plunky 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
hci_device_cb(kauth_cred_t cred,kauth_action_t action,void * cookie,void * arg0,void * arg1,void * arg2,void * arg3)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
hci_init(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
hci_drop(void * arg)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
hci_cmdwait_flush(struct socket * so)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 static int
hci_attach(struct socket * so,int proto)352 hci_attach(struct socket *so, int proto)
353 {
354 struct hci_pcb *pcb;
355 int error;
356
357 KASSERT(so->so_pcb == NULL);
358
359 if (so->so_lock == NULL) {
360 mutex_obj_hold(bt_lock);
361 so->so_lock = bt_lock;
362 solock(so);
363 }
364 KASSERT(solocked(so));
365
366 error = soreserve(so, hci_sendspace, hci_recvspace);
367 if (error) {
368 return error;
369 }
370
371 pcb = kmem_zalloc(sizeof(struct hci_pcb), KM_SLEEP);
372 pcb->hp_cred = kauth_cred_dup(curlwp->l_cred);
373 pcb->hp_socket = so;
374
375 /*
376 * Set default user filter. By default, socket only passes
377 * Command_Complete and Command_Status Events.
378 */
379 hci_filter_set(HCI_EVENT_COMMAND_COMPL, &pcb->hp_efilter);
380 hci_filter_set(HCI_EVENT_COMMAND_STATUS, &pcb->hp_efilter);
381 hci_filter_set(HCI_EVENT_PKT, &pcb->hp_pfilter);
382
383 LIST_INSERT_HEAD(&hci_pcb, pcb, hp_next);
384 so->so_pcb = pcb;
385
386 return 0;
387 }
388
389 static void
hci_detach(struct socket * so)390 hci_detach(struct socket *so)
391 {
392 struct hci_pcb *pcb;
393
394 pcb = (struct hci_pcb *)so->so_pcb;
395 KASSERT(pcb != NULL);
396
397 if (so->so_snd.sb_mb != NULL)
398 hci_cmdwait_flush(so);
399
400 if (pcb->hp_cred != NULL)
401 kauth_cred_free(pcb->hp_cred);
402
403 so->so_pcb = NULL;
404 LIST_REMOVE(pcb, hp_next);
405 kmem_free(pcb, sizeof(*pcb));
406 }
407
408 static int
hci_accept(struct socket * so,struct sockaddr * nam)409 hci_accept(struct socket *so, struct sockaddr *nam)
410 {
411 KASSERT(solocked(so));
412
413 return EOPNOTSUPP;
414 }
415
416 static int
hci_bind(struct socket * so,struct sockaddr * nam,struct lwp * l)417 hci_bind(struct socket *so, struct sockaddr *nam, struct lwp *l)
418 {
419 struct hci_pcb *pcb = so->so_pcb;
420 struct sockaddr_bt *sa = (struct sockaddr_bt *)nam;
421
422 KASSERT(solocked(so));
423 KASSERT(pcb != NULL);
424 KASSERT(nam != NULL);
425
426 if (sa->bt_len != sizeof(struct sockaddr_bt))
427 return EINVAL;
428
429 if (sa->bt_family != AF_BLUETOOTH)
430 return EAFNOSUPPORT;
431
432 bdaddr_copy(&pcb->hp_laddr, &sa->bt_bdaddr);
433
434 if (bdaddr_any(&sa->bt_bdaddr))
435 pcb->hp_flags |= HCI_PROMISCUOUS;
436 else
437 pcb->hp_flags &= ~HCI_PROMISCUOUS;
438
439 return 0;
440 }
441
442 static int
hci_listen(struct socket * so,struct lwp * l)443 hci_listen(struct socket *so, struct lwp *l)
444 {
445 KASSERT(solocked(so));
446
447 return EOPNOTSUPP;
448 }
449
450 static int
hci_connect(struct socket * so,struct sockaddr * nam,struct lwp * l)451 hci_connect(struct socket *so, struct sockaddr *nam, struct lwp *l)
452 {
453 struct hci_pcb *pcb = so->so_pcb;
454 struct sockaddr_bt *sa = (struct sockaddr_bt *)nam;
455
456 KASSERT(solocked(so));
457 KASSERT(pcb != NULL);
458 KASSERT(nam != NULL);
459
460 if (sa->bt_len != sizeof(struct sockaddr_bt))
461 return EINVAL;
462
463 if (sa->bt_family != AF_BLUETOOTH)
464 return EAFNOSUPPORT;
465
466 if (hci_unit_lookup(&sa->bt_bdaddr) == NULL)
467 return EADDRNOTAVAIL;
468
469 bdaddr_copy(&pcb->hp_raddr, &sa->bt_bdaddr);
470 soisconnected(so);
471 return 0;
472 }
473
474 static int
hci_connect2(struct socket * so,struct socket * so2)475 hci_connect2(struct socket *so, struct socket *so2)
476 {
477 KASSERT(solocked(so));
478
479 return EOPNOTSUPP;
480 }
481
482 static int
hci_disconnect(struct socket * so)483 hci_disconnect(struct socket *so)
484 {
485 struct hci_pcb *pcb = so->so_pcb;
486
487 KASSERT(solocked(so));
488 KASSERT(pcb != NULL);
489
490 bdaddr_copy(&pcb->hp_raddr, BDADDR_ANY);
491
492 /* XXX we cannot call soisdisconnected() here, as it sets
493 * SS_CANTRCVMORE and SS_CANTSENDMORE. The problem being,
494 * that soisconnected() does not clear these and if you
495 * try to reconnect this socket (which is permitted) you
496 * get a broken pipe when you try to write any data.
497 */
498 so->so_state &= ~SS_ISCONNECTED;
499 return 0;
500 }
501
502 static int
hci_shutdown(struct socket * so)503 hci_shutdown(struct socket *so)
504 {
505 KASSERT(solocked(so));
506
507 socantsendmore(so);
508 return 0;
509 }
510
511 static int
hci_abort(struct socket * so)512 hci_abort(struct socket *so)
513 {
514 KASSERT(solocked(so));
515
516 soisdisconnected(so);
517 hci_detach(so);
518 return 0;
519 }
520
521 static int
hci_ioctl(struct socket * so,u_long cmd,void * nam,struct ifnet * ifp)522 hci_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp)
523 {
524 int err;
525 mutex_enter(bt_lock);
526 err = hci_ioctl_pcb(cmd, nam);
527 mutex_exit(bt_lock);
528 return err;
529 }
530
531 static int
hci_stat(struct socket * so,struct stat * ub)532 hci_stat(struct socket *so, struct stat *ub)
533 {
534 KASSERT(solocked(so));
535
536 return 0;
537 }
538
539 static int
hci_peeraddr(struct socket * so,struct sockaddr * nam)540 hci_peeraddr(struct socket *so, struct sockaddr *nam)
541 {
542 struct hci_pcb *pcb = (struct hci_pcb *)so->so_pcb;
543 struct sockaddr_bt *sa = (struct sockaddr_bt *)nam;
544
545 KASSERT(solocked(so));
546 KASSERT(pcb != NULL);
547 KASSERT(nam != NULL);
548
549 memset(sa, 0, sizeof(struct sockaddr_bt));
550 sa->bt_len = sizeof(struct sockaddr_bt);
551 sa->bt_family = AF_BLUETOOTH;
552 bdaddr_copy(&sa->bt_bdaddr, &pcb->hp_raddr);
553 return 0;
554 }
555
556 static int
hci_sockaddr(struct socket * so,struct sockaddr * nam)557 hci_sockaddr(struct socket *so, struct sockaddr *nam)
558 {
559 struct hci_pcb *pcb = (struct hci_pcb *)so->so_pcb;
560 struct sockaddr_bt *sa = (struct sockaddr_bt *)nam;
561
562 KASSERT(solocked(so));
563 KASSERT(pcb != NULL);
564 KASSERT(nam != NULL);
565
566 memset(sa, 0, sizeof(struct sockaddr_bt));
567 sa->bt_len = sizeof(struct sockaddr_bt);
568 sa->bt_family = AF_BLUETOOTH;
569 bdaddr_copy(&sa->bt_bdaddr, &pcb->hp_laddr);
570 return 0;
571 }
572
573 static int
hci_rcvd(struct socket * so,int flags,struct lwp * l)574 hci_rcvd(struct socket *so, int flags, struct lwp *l)
575 {
576 KASSERT(solocked(so));
577
578 return EOPNOTSUPP;
579 }
580
581 static int
hci_recvoob(struct socket * so,struct mbuf * m,int flags)582 hci_recvoob(struct socket *so, struct mbuf *m, int flags)
583 {
584 KASSERT(solocked(so));
585
586 return EOPNOTSUPP;
587 }
588
589 static int
hci_send(struct socket * so,struct mbuf * m,struct sockaddr * nam,struct mbuf * control,struct lwp * l)590 hci_send(struct socket *so, struct mbuf *m, struct sockaddr *nam,
591 struct mbuf *control, struct lwp *l)
592 {
593 struct hci_pcb *pcb = so->so_pcb;
594 struct sockaddr_bt *sa = (struct sockaddr_bt *)nam;
595 struct hci_unit *unit;
596 struct mbuf *m0;
597 hci_cmd_hdr_t hdr;
598 int err = 0;
599
600 KASSERT(solocked(so));
601 KASSERT(pcb != NULL);
602 KASSERT(m != NULL);
603
604 if (control) /* have no use for this */
605 m_freem(control);
606
607 if (sa) {
608 if (sa->bt_len != sizeof(struct sockaddr_bt)) {
609 err = EINVAL;
610 goto bad;
611 }
612
613 if (sa->bt_family != AF_BLUETOOTH) {
614 err = EAFNOSUPPORT;
615 goto bad;
616 }
617 }
618
619 /*
620 * this came from userland, so we check it out first
621 */
622
623 /* wants at least a header to start with */
624 if (m->m_pkthdr.len < sizeof(hdr)) {
625 err = EMSGSIZE;
626 goto bad;
627 }
628 m_copydata(m, 0, sizeof(hdr), &hdr);
629 hdr.opcode = le16toh(hdr.opcode);
630
631 /* only allows CMD packets to be sent */
632 if (hdr.type != HCI_CMD_PKT) {
633 err = EINVAL;
634 goto bad;
635 }
636
637 /* validates packet length */
638 if (m->m_pkthdr.len != sizeof(hdr) + hdr.length) {
639 err = EMSGSIZE;
640 goto bad;
641 }
642
643 /* finds destination */
644 unit = hci_unit_lookup((sa ? &sa->bt_bdaddr : &pcb->hp_raddr));
645 if (unit == NULL) {
646 err = ENETDOWN;
647 goto bad;
648 }
649
650 /* security checks for unprivileged users */
651 if (pcb->hp_cred != NULL
652 && kauth_authorize_device(pcb->hp_cred,
653 KAUTH_DEVICE_BLUETOOTH_SEND,
654 unit, &hdr, NULL, NULL) != 0) {
655 err = EPERM;
656 goto bad;
657 }
658
659 /* makess a copy for precious to keep */
660 m0 = m_copypacket(m, M_DONTWAIT);
661 if (m0 == NULL) {
662 err = ENOMEM;
663 goto bad;
664 }
665 sbappendrecord(&pcb->hp_socket->so_snd, m0);
666 M_SETCTX(m, pcb->hp_socket); /* enable drop callback */
667
668 DPRINTFN(2, "(%s) opcode (%03x|%04x)\n", device_xname(unit->hci_dev),
669 HCI_OGF(hdr.opcode), HCI_OCF(hdr.opcode));
670
671 /* Sendss it */
672 if (unit->hci_num_cmd_pkts == 0)
673 MBUFQ_ENQUEUE(&unit->hci_cmdwait, m);
674 else
675 hci_output_cmd(unit, m);
676
677 return 0;
678
679 bad:
680 DPRINTF("packet (%d bytes) not sent (error %d)\n",
681 m->m_pkthdr.len, err);
682 if (m)
683 m_freem(m);
684
685 return err;
686 }
687
688 static int
hci_sendoob(struct socket * so,struct mbuf * m,struct mbuf * control)689 hci_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control)
690 {
691 KASSERT(solocked(so));
692
693 if (m)
694 m_freem(m);
695 if (control)
696 m_freem(control);
697
698 return EOPNOTSUPP;
699 }
700
701 static int
hci_purgeif(struct socket * so,struct ifnet * ifp)702 hci_purgeif(struct socket *so, struct ifnet *ifp)
703 {
704
705 return EOPNOTSUPP;
706 }
707
708 /*
709 * get/set socket options
710 */
711 int
hci_ctloutput(int req,struct socket * so,struct sockopt * sopt)712 hci_ctloutput(int req, struct socket *so, struct sockopt *sopt)
713 {
714 struct hci_pcb *pcb = (struct hci_pcb *)so->so_pcb;
715 int optval, err = 0;
716
717 DPRINTFN(2, "req %s\n", prcorequests[req]);
718
719 if (pcb == NULL)
720 return EINVAL;
721
722 if (sopt->sopt_level != BTPROTO_HCI)
723 return ENOPROTOOPT;
724
725 switch(req) {
726 case PRCO_GETOPT:
727 switch (sopt->sopt_name) {
728 case SO_HCI_EVT_FILTER:
729 err = sockopt_set(sopt, &pcb->hp_efilter,
730 sizeof(struct hci_filter));
731
732 break;
733
734 case SO_HCI_PKT_FILTER:
735 err = sockopt_set(sopt, &pcb->hp_pfilter,
736 sizeof(struct hci_filter));
737
738 break;
739
740 case SO_HCI_DIRECTION:
741 err = sockopt_setint(sopt,
742 (pcb->hp_flags & HCI_DIRECTION ? 1 : 0));
743
744 break;
745
746 default:
747 err = ENOPROTOOPT;
748 break;
749 }
750 break;
751
752 case PRCO_SETOPT:
753 switch (sopt->sopt_name) {
754 case SO_HCI_EVT_FILTER: /* set event filter */
755 err = sockopt_get(sopt, &pcb->hp_efilter,
756 sizeof(pcb->hp_efilter));
757
758 break;
759
760 case SO_HCI_PKT_FILTER: /* set packet filter */
761 err = sockopt_get(sopt, &pcb->hp_pfilter,
762 sizeof(pcb->hp_pfilter));
763
764 break;
765
766 case SO_HCI_DIRECTION: /* request direction ctl messages */
767 err = sockopt_getint(sopt, &optval);
768 if (err)
769 break;
770
771 if (optval)
772 pcb->hp_flags |= HCI_DIRECTION;
773 else
774 pcb->hp_flags &= ~HCI_DIRECTION;
775 break;
776
777 default:
778 err = ENOPROTOOPT;
779 break;
780 }
781 break;
782
783 default:
784 err = ENOPROTOOPT;
785 break;
786 }
787
788 return err;
789 }
790
791 /*
792 * HCI mbuf tap routine
793 *
794 * copy packets to any raw HCI sockets that wish (and are
795 * permitted) to see them
796 */
797 void
hci_mtap(struct mbuf * m,struct hci_unit * unit)798 hci_mtap(struct mbuf *m, struct hci_unit *unit)
799 {
800 struct hci_pcb *pcb;
801 struct mbuf *m0, *ctlmsg, **ctl;
802 struct sockaddr_bt sa;
803 uint8_t type;
804 uint8_t event;
805 uint16_t arg1;
806
807 KASSERT(m->m_len >= sizeof(type));
808
809 type = *mtod(m, uint8_t *);
810
811 memset(&sa, 0, sizeof(sa));
812 sa.bt_len = sizeof(struct sockaddr_bt);
813 sa.bt_family = AF_BLUETOOTH;
814 bdaddr_copy(&sa.bt_bdaddr, &unit->hci_bdaddr);
815
816 LIST_FOREACH(pcb, &hci_pcb, hp_next) {
817 /*
818 * filter according to source address
819 */
820 if ((pcb->hp_flags & HCI_PROMISCUOUS) == 0
821 && bdaddr_same(&pcb->hp_laddr, &sa.bt_bdaddr) == 0)
822 continue;
823
824 /*
825 * filter according to packet type filter
826 */
827 if (hci_filter_test(type, &pcb->hp_pfilter) == 0)
828 continue;
829
830 /*
831 * filter according to event/security filters
832 */
833 switch(type) {
834 case HCI_EVENT_PKT:
835 KASSERT(m->m_len >= sizeof(hci_event_hdr_t));
836
837 event = mtod(m, hci_event_hdr_t *)->event;
838
839 if (hci_filter_test(event, &pcb->hp_efilter) == 0)
840 continue;
841
842 arg1 = event;
843 break;
844
845 case HCI_CMD_PKT:
846 KASSERT(m->m_len >= sizeof(hci_cmd_hdr_t));
847 arg1 = le16toh(mtod(m, hci_cmd_hdr_t *)->opcode);
848 break;
849
850 case HCI_ACL_DATA_PKT:
851 KASSERT(m->m_len >= sizeof(hci_acldata_hdr_t));
852 arg1 = le16toh(mtod(m, hci_acldata_hdr_t *)->con_handle);
853 arg1 = HCI_CON_HANDLE(arg1);
854 break;
855
856 case HCI_SCO_DATA_PKT:
857 KASSERT(m->m_len >= sizeof(hci_scodata_hdr_t));
858 arg1 = le16toh(mtod(m, hci_scodata_hdr_t *)->con_handle);
859 arg1 = HCI_CON_HANDLE(arg1);
860 break;
861
862 default:
863 arg1 = 0;
864 break;
865 }
866
867 if (pcb->hp_cred != NULL
868 && kauth_authorize_device(pcb->hp_cred,
869 KAUTH_DEVICE_BLUETOOTH_RECV,
870 KAUTH_ARG(type), KAUTH_ARG(arg1), NULL, NULL) != 0)
871 continue;
872
873 /*
874 * create control messages
875 */
876 ctlmsg = NULL;
877 ctl = &ctlmsg;
878 if (pcb->hp_flags & HCI_DIRECTION) {
879 int dir = m->m_flags & M_LINK0 ? 1 : 0;
880
881 *ctl = sbcreatecontrol(&dir, sizeof(dir),
882 SCM_HCI_DIRECTION, BTPROTO_HCI);
883
884 if (*ctl != NULL)
885 ctl = &((*ctl)->m_next);
886 }
887 if (pcb->hp_socket->so_options & SO_TIMESTAMP) {
888 struct timeval tv;
889
890 microtime(&tv);
891 *ctl = sbcreatecontrol(&tv, sizeof(tv),
892 SCM_TIMESTAMP, SOL_SOCKET);
893
894 if (*ctl != NULL)
895 ctl = &((*ctl)->m_next);
896 }
897
898 /*
899 * copy to socket
900 */
901 m0 = m_copypacket(m, M_DONTWAIT);
902 if (m0 && sbappendaddr(&pcb->hp_socket->so_rcv,
903 (struct sockaddr *)&sa, m0, ctlmsg)) {
904 sorwakeup(pcb->hp_socket);
905 } else {
906 m_freem(ctlmsg);
907 m_freem(m0);
908 }
909 }
910 }
911
912 PR_WRAP_USRREQS(hci)
913
914 #define hci_attach hci_attach_wrapper
915 #define hci_detach hci_detach_wrapper
916 #define hci_accept hci_accept_wrapper
917 #define hci_bind hci_bind_wrapper
918 #define hci_listen hci_listen_wrapper
919 #define hci_connect hci_connect_wrapper
920 #define hci_connect2 hci_connect2_wrapper
921 #define hci_disconnect hci_disconnect_wrapper
922 #define hci_shutdown hci_shutdown_wrapper
923 #define hci_abort hci_abort_wrapper
924 #define hci_ioctl hci_ioctl_wrapper
925 #define hci_stat hci_stat_wrapper
926 #define hci_peeraddr hci_peeraddr_wrapper
927 #define hci_sockaddr hci_sockaddr_wrapper
928 #define hci_rcvd hci_rcvd_wrapper
929 #define hci_recvoob hci_recvoob_wrapper
930 #define hci_send hci_send_wrapper
931 #define hci_sendoob hci_sendoob_wrapper
932 #define hci_purgeif hci_purgeif_wrapper
933
934 const struct pr_usrreqs hci_usrreqs = {
935 .pr_attach = hci_attach,
936 .pr_detach = hci_detach,
937 .pr_accept = hci_accept,
938 .pr_bind = hci_bind,
939 .pr_listen = hci_listen,
940 .pr_connect = hci_connect,
941 .pr_connect2 = hci_connect2,
942 .pr_disconnect = hci_disconnect,
943 .pr_shutdown = hci_shutdown,
944 .pr_abort = hci_abort,
945 .pr_ioctl = hci_ioctl,
946 .pr_stat = hci_stat,
947 .pr_peeraddr = hci_peeraddr,
948 .pr_sockaddr = hci_sockaddr,
949 .pr_rcvd = hci_rcvd,
950 .pr_recvoob = hci_recvoob,
951 .pr_send = hci_send,
952 .pr_sendoob = hci_sendoob,
953 .pr_purgeif = hci_purgeif,
954 };
955