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workqueue: Calling destroy_work_on_stack() to pair with INIT_WORK_ONSTACK()
[linux-2.6/btrfs-unstable.git] / net / bluetooth / hci_sock.c
blob6a6c8bb4fd72d4f2d4294b9f7fed772d81e57b93
1 /*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4
5 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License version 2 as
9 published by the Free Software Foundation;
10
11 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
12 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
14 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
15 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
16 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19
20 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
21 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
22 SOFTWARE IS DISCLAIMED.
23 */
24
25 /* Bluetooth HCI sockets. */
26
27 #include <linux/export.h>
28 #include <asm/unaligned.h>
29
30 #include <net/bluetooth/bluetooth.h>
31 #include <net/bluetooth/hci_core.h>
32 #include <net/bluetooth/hci_mon.h>
33
34 static atomic_t monitor_promisc = ATOMIC_INIT(0);
35
36 /* ----- HCI socket interface ----- */
37
38 static inline int hci_test_bit(int nr, void *addr)
39 {
40 return *((__u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31));
41 }
42
43 /* Security filter */
44 static struct hci_sec_filter hci_sec_filter = {
45 /* Packet types */
46 0x10,
47 /* Events */
48 { 0x1000d9fe, 0x0000b00c },
49 /* Commands */
50 {
51 { 0x0 },
52 /* OGF_LINK_CTL */
53 { 0xbe000006, 0x00000001, 0x00000000, 0x00 },
54 /* OGF_LINK_POLICY */
55 { 0x00005200, 0x00000000, 0x00000000, 0x00 },
56 /* OGF_HOST_CTL */
57 { 0xaab00200, 0x2b402aaa, 0x05220154, 0x00 },
58 /* OGF_INFO_PARAM */
59 { 0x000002be, 0x00000000, 0x00000000, 0x00 },
60 /* OGF_STATUS_PARAM */
61 { 0x000000ea, 0x00000000, 0x00000000, 0x00 }
62 }
63 };
64
65 static struct bt_sock_list hci_sk_list = {
66 .lock = __RW_LOCK_UNLOCKED(hci_sk_list.lock)
67 };
68
69 static bool is_filtered_packet(struct sock *sk, struct sk_buff *skb)
70 {
71 struct hci_filter *flt;
72 int flt_type, flt_event;
73
74 /* Apply filter */
75 flt = &hci_pi(sk)->filter;
76
77 if (bt_cb(skb)->pkt_type == HCI_VENDOR_PKT)
78 flt_type = 0;
79 else
80 flt_type = bt_cb(skb)->pkt_type & HCI_FLT_TYPE_BITS;
81
82 if (!test_bit(flt_type, &flt->type_mask))
83 return true;
84
85 /* Extra filter for event packets only */
86 if (bt_cb(skb)->pkt_type != HCI_EVENT_PKT)
87 return false;
88
89 flt_event = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS);
90
91 if (!hci_test_bit(flt_event, &flt->event_mask))
92 return true;
93
94 /* Check filter only when opcode is set */
95 if (!flt->opcode)
96 return false;
97
98 if (flt_event == HCI_EV_CMD_COMPLETE &&
99 flt->opcode != get_unaligned((__le16 *)(skb->data + 3)))
100 return true;
101
102 if (flt_event == HCI_EV_CMD_STATUS &&
103 flt->opcode != get_unaligned((__le16 *)(skb->data + 4)))
104 return true;
105
106 return false;
107 }
108
109 /* Send frame to RAW socket */
110 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
111 {
112 struct sock *sk;
113 struct sk_buff *skb_copy = NULL;
114
115 BT_DBG("hdev %p len %d", hdev, skb->len);
116
117 read_lock(&hci_sk_list.lock);
118
119 sk_for_each(sk, &hci_sk_list.head) {
120 struct sk_buff *nskb;
121
122 if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev)
123 continue;
124
125 /* Don't send frame to the socket it came from */
126 if (skb->sk == sk)
127 continue;
128
129 if (hci_pi(sk)->channel == HCI_CHANNEL_RAW) {
130 if (is_filtered_packet(sk, skb))
131 continue;
132 } else if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
133 if (!bt_cb(skb)->incoming)
134 continue;
135 if (bt_cb(skb)->pkt_type != HCI_EVENT_PKT &&
136 bt_cb(skb)->pkt_type != HCI_ACLDATA_PKT &&
137 bt_cb(skb)->pkt_type != HCI_SCODATA_PKT)
138 continue;
139 } else {
140 /* Don't send frame to other channel types */
141 continue;
142 }
143
144 if (!skb_copy) {
145 /* Create a private copy with headroom */
146 skb_copy = __pskb_copy(skb, 1, GFP_ATOMIC);
147 if (!skb_copy)
148 continue;
149
150 /* Put type byte before the data */
151 memcpy(skb_push(skb_copy, 1), &bt_cb(skb)->pkt_type, 1);
152 }
153
154 nskb = skb_clone(skb_copy, GFP_ATOMIC);
155 if (!nskb)
156 continue;
157
158 if (sock_queue_rcv_skb(sk, nskb))
159 kfree_skb(nskb);
160 }
161
162 read_unlock(&hci_sk_list.lock);
163
164 kfree_skb(skb_copy);
165 }
166
167 /* Send frame to control socket */
168 void hci_send_to_control(struct sk_buff *skb, struct sock *skip_sk)
169 {
170 struct sock *sk;
171
172 BT_DBG("len %d", skb->len);
173
174 read_lock(&hci_sk_list.lock);
175
176 sk_for_each(sk, &hci_sk_list.head) {
177 struct sk_buff *nskb;
178
179 /* Skip the original socket */
180 if (sk == skip_sk)
181 continue;
182
183 if (sk->sk_state != BT_BOUND)
184 continue;
185
186 if (hci_pi(sk)->channel != HCI_CHANNEL_CONTROL)
187 continue;
188
189 nskb = skb_clone(skb, GFP_ATOMIC);
190 if (!nskb)
191 continue;
192
193 if (sock_queue_rcv_skb(sk, nskb))
194 kfree_skb(nskb);
195 }
196
197 read_unlock(&hci_sk_list.lock);
198 }
199
200 /* Send frame to monitor socket */
201 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb)
202 {
203 struct sock *sk;
204 struct sk_buff *skb_copy = NULL;
205 __le16 opcode;
206
207 if (!atomic_read(&monitor_promisc))
208 return;
209
210 BT_DBG("hdev %p len %d", hdev, skb->len);
211
212 switch (bt_cb(skb)->pkt_type) {
213 case HCI_COMMAND_PKT:
214 opcode = __constant_cpu_to_le16(HCI_MON_COMMAND_PKT);
215 break;
216 case HCI_EVENT_PKT:
217 opcode = __constant_cpu_to_le16(HCI_MON_EVENT_PKT);
218 break;
219 case HCI_ACLDATA_PKT:
220 if (bt_cb(skb)->incoming)
221 opcode = __constant_cpu_to_le16(HCI_MON_ACL_RX_PKT);
222 else
223 opcode = __constant_cpu_to_le16(HCI_MON_ACL_TX_PKT);
224 break;
225 case HCI_SCODATA_PKT:
226 if (bt_cb(skb)->incoming)
227 opcode = __constant_cpu_to_le16(HCI_MON_SCO_RX_PKT);
228 else
229 opcode = __constant_cpu_to_le16(HCI_MON_SCO_TX_PKT);
230 break;
231 default:
232 return;
233 }
234
235 read_lock(&hci_sk_list.lock);
236
237 sk_for_each(sk, &hci_sk_list.head) {
238 struct sk_buff *nskb;
239
240 if (sk->sk_state != BT_BOUND)
241 continue;
242
243 if (hci_pi(sk)->channel != HCI_CHANNEL_MONITOR)
244 continue;
245
246 if (!skb_copy) {
247 struct hci_mon_hdr *hdr;
248
249 /* Create a private copy with headroom */
250 skb_copy = __pskb_copy(skb, HCI_MON_HDR_SIZE,
251 GFP_ATOMIC);
252 if (!skb_copy)
253 continue;
254
255 /* Put header before the data */
256 hdr = (void *) skb_push(skb_copy, HCI_MON_HDR_SIZE);
257 hdr->opcode = opcode;
258 hdr->index = cpu_to_le16(hdev->id);
259 hdr->len = cpu_to_le16(skb->len);
260 }
261
262 nskb = skb_clone(skb_copy, GFP_ATOMIC);
263 if (!nskb)
264 continue;
265
266 if (sock_queue_rcv_skb(sk, nskb))
267 kfree_skb(nskb);
268 }
269
270 read_unlock(&hci_sk_list.lock);
271
272 kfree_skb(skb_copy);
273 }
274
275 static void send_monitor_event(struct sk_buff *skb)
276 {
277 struct sock *sk;
278
279 BT_DBG("len %d", skb->len);
280
281 read_lock(&hci_sk_list.lock);
282
283 sk_for_each(sk, &hci_sk_list.head) {
284 struct sk_buff *nskb;
285
286 if (sk->sk_state != BT_BOUND)
287 continue;
288
289 if (hci_pi(sk)->channel != HCI_CHANNEL_MONITOR)
290 continue;
291
292 nskb = skb_clone(skb, GFP_ATOMIC);
293 if (!nskb)
294 continue;
295
296 if (sock_queue_rcv_skb(sk, nskb))
297 kfree_skb(nskb);
298 }
299
300 read_unlock(&hci_sk_list.lock);
301 }
302
303 static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event)
304 {
305 struct hci_mon_hdr *hdr;
306 struct hci_mon_new_index *ni;
307 struct sk_buff *skb;
308 __le16 opcode;
309
310 switch (event) {
311 case HCI_DEV_REG:
312 skb = bt_skb_alloc(HCI_MON_NEW_INDEX_SIZE, GFP_ATOMIC);
313 if (!skb)
314 return NULL;
315
316 ni = (void *) skb_put(skb, HCI_MON_NEW_INDEX_SIZE);
317 ni->type = hdev->dev_type;
318 ni->bus = hdev->bus;
319 bacpy(&ni->bdaddr, &hdev->bdaddr);
320 memcpy(ni->name, hdev->name, 8);
321
322 opcode = __constant_cpu_to_le16(HCI_MON_NEW_INDEX);
323 break;
324
325 case HCI_DEV_UNREG:
326 skb = bt_skb_alloc(0, GFP_ATOMIC);
327 if (!skb)
328 return NULL;
329
330 opcode = __constant_cpu_to_le16(HCI_MON_DEL_INDEX);
331 break;
332
333 default:
334 return NULL;
335 }
336
337 __net_timestamp(skb);
338
339 hdr = (void *) skb_push(skb, HCI_MON_HDR_SIZE);
340 hdr->opcode = opcode;
341 hdr->index = cpu_to_le16(hdev->id);
342 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
343
344 return skb;
345 }
346
347 static void send_monitor_replay(struct sock *sk)
348 {
349 struct hci_dev *hdev;
350
351 read_lock(&hci_dev_list_lock);
352
353 list_for_each_entry(hdev, &hci_dev_list, list) {
354 struct sk_buff *skb;
355
356 skb = create_monitor_event(hdev, HCI_DEV_REG);
357 if (!skb)
358 continue;
359
360 if (sock_queue_rcv_skb(sk, skb))
361 kfree_skb(skb);
362 }
363
364 read_unlock(&hci_dev_list_lock);
365 }
366
367 /* Generate internal stack event */
368 static void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data)
369 {
370 struct hci_event_hdr *hdr;
371 struct hci_ev_stack_internal *ev;
372 struct sk_buff *skb;
373
374 skb = bt_skb_alloc(HCI_EVENT_HDR_SIZE + sizeof(*ev) + dlen, GFP_ATOMIC);
375 if (!skb)
376 return;
377
378 hdr = (void *) skb_put(skb, HCI_EVENT_HDR_SIZE);
379 hdr->evt = HCI_EV_STACK_INTERNAL;
380 hdr->plen = sizeof(*ev) + dlen;
381
382 ev = (void *) skb_put(skb, sizeof(*ev) + dlen);
383 ev->type = type;
384 memcpy(ev->data, data, dlen);
385
386 bt_cb(skb)->incoming = 1;
387 __net_timestamp(skb);
388
389 bt_cb(skb)->pkt_type = HCI_EVENT_PKT;
390 hci_send_to_sock(hdev, skb);
391 kfree_skb(skb);
392 }
393
394 void hci_sock_dev_event(struct hci_dev *hdev, int event)
395 {
396 struct hci_ev_si_device ev;
397
398 BT_DBG("hdev %s event %d", hdev->name, event);
399
400 /* Send event to monitor */
401 if (atomic_read(&monitor_promisc)) {
402 struct sk_buff *skb;
403
404 skb = create_monitor_event(hdev, event);
405 if (skb) {
406 send_monitor_event(skb);
407 kfree_skb(skb);
408 }
409 }
410
411 /* Send event to sockets */
412 ev.event = event;
413 ev.dev_id = hdev->id;
414 hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev);
415
416 if (event == HCI_DEV_UNREG) {
417 struct sock *sk;
418
419 /* Detach sockets from device */
420 read_lock(&hci_sk_list.lock);
421 sk_for_each(sk, &hci_sk_list.head) {
422 bh_lock_sock_nested(sk);
423 if (hci_pi(sk)->hdev == hdev) {
424 hci_pi(sk)->hdev = NULL;
425 sk->sk_err = EPIPE;
426 sk->sk_state = BT_OPEN;
427 sk->sk_state_change(sk);
428
429 hci_dev_put(hdev);
430 }
431 bh_unlock_sock(sk);
432 }
433 read_unlock(&hci_sk_list.lock);
434 }
435 }
436
437 static int hci_sock_release(struct socket *sock)
438 {
439 struct sock *sk = sock->sk;
440 struct hci_dev *hdev;
441
442 BT_DBG("sock %p sk %p", sock, sk);
443
444 if (!sk)
445 return 0;
446
447 hdev = hci_pi(sk)->hdev;
448
449 if (hci_pi(sk)->channel == HCI_CHANNEL_MONITOR)
450 atomic_dec(&monitor_promisc);
451
452 bt_sock_unlink(&hci_sk_list, sk);
453
454 if (hdev) {
455 if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
456 mgmt_index_added(hdev);
457 clear_bit(HCI_USER_CHANNEL, &hdev->dev_flags);
458 hci_dev_close(hdev->id);
459 }
460
461 atomic_dec(&hdev->promisc);
462 hci_dev_put(hdev);
463 }
464
465 sock_orphan(sk);
466
467 skb_queue_purge(&sk->sk_receive_queue);
468 skb_queue_purge(&sk->sk_write_queue);
469
470 sock_put(sk);
471 return 0;
472 }
473
474 static int hci_sock_blacklist_add(struct hci_dev *hdev, void __user *arg)
475 {
476 bdaddr_t bdaddr;
477 int err;
478
479 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
480 return -EFAULT;
481
482 hci_dev_lock(hdev);
483
484 err = hci_blacklist_add(hdev, &bdaddr, BDADDR_BREDR);
485
486 hci_dev_unlock(hdev);
487
488 return err;
489 }
490
491 static int hci_sock_blacklist_del(struct hci_dev *hdev, void __user *arg)
492 {
493 bdaddr_t bdaddr;
494 int err;
495
496 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
497 return -EFAULT;
498
499 hci_dev_lock(hdev);
500
501 err = hci_blacklist_del(hdev, &bdaddr, BDADDR_BREDR);
502
503 hci_dev_unlock(hdev);
504
505 return err;
506 }
507
508 /* Ioctls that require bound socket */
509 static int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd,
510 unsigned long arg)
511 {
512 struct hci_dev *hdev = hci_pi(sk)->hdev;
513
514 if (!hdev)
515 return -EBADFD;
516
517 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags))
518 return -EBUSY;
519
520 if (hdev->dev_type != HCI_BREDR)
521 return -EOPNOTSUPP;
522
523 switch (cmd) {
524 case HCISETRAW:
525 if (!capable(CAP_NET_ADMIN))
526 return -EPERM;
527
528 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
529 return -EPERM;
530
531 if (arg)
532 set_bit(HCI_RAW, &hdev->flags);
533 else
534 clear_bit(HCI_RAW, &hdev->flags);
535
536 return 0;
537
538 case HCIGETCONNINFO:
539 return hci_get_conn_info(hdev, (void __user *) arg);
540
541 case HCIGETAUTHINFO:
542 return hci_get_auth_info(hdev, (void __user *) arg);
543
544 case HCIBLOCKADDR:
545 if (!capable(CAP_NET_ADMIN))
546 return -EPERM;
547 return hci_sock_blacklist_add(hdev, (void __user *) arg);
548
549 case HCIUNBLOCKADDR:
550 if (!capable(CAP_NET_ADMIN))
551 return -EPERM;
552 return hci_sock_blacklist_del(hdev, (void __user *) arg);
553 }
554
555 return -ENOIOCTLCMD;
556 }
557
558 static int hci_sock_ioctl(struct socket *sock, unsigned int cmd,
559 unsigned long arg)
560 {
561 void __user *argp = (void __user *) arg;
562 struct sock *sk = sock->sk;
563 int err;
564
565 BT_DBG("cmd %x arg %lx", cmd, arg);
566
567 lock_sock(sk);
568
569 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
570 err = -EBADFD;
571 goto done;
572 }
573
574 release_sock(sk);
575
576 switch (cmd) {
577 case HCIGETDEVLIST:
578 return hci_get_dev_list(argp);
579
580 case HCIGETDEVINFO:
581 return hci_get_dev_info(argp);
582
583 case HCIGETCONNLIST:
584 return hci_get_conn_list(argp);
585
586 case HCIDEVUP:
587 if (!capable(CAP_NET_ADMIN))
588 return -EPERM;
589 return hci_dev_open(arg);
590
591 case HCIDEVDOWN:
592 if (!capable(CAP_NET_ADMIN))
593 return -EPERM;
594 return hci_dev_close(arg);
595
596 case HCIDEVRESET:
597 if (!capable(CAP_NET_ADMIN))
598 return -EPERM;
599 return hci_dev_reset(arg);
600
601 case HCIDEVRESTAT:
602 if (!capable(CAP_NET_ADMIN))
603 return -EPERM;
604 return hci_dev_reset_stat(arg);
605
606 case HCISETSCAN:
607 case HCISETAUTH:
608 case HCISETENCRYPT:
609 case HCISETPTYPE:
610 case HCISETLINKPOL:
611 case HCISETLINKMODE:
612 case HCISETACLMTU:
613 case HCISETSCOMTU:
614 if (!capable(CAP_NET_ADMIN))
615 return -EPERM;
616 return hci_dev_cmd(cmd, argp);
617
618 case HCIINQUIRY:
619 return hci_inquiry(argp);
620 }
621
622 lock_sock(sk);
623
624 err = hci_sock_bound_ioctl(sk, cmd, arg);
625
626 done:
627 release_sock(sk);
628 return err;
629 }
630
631 static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
632 int addr_len)
633 {
634 struct sockaddr_hci haddr;
635 struct sock *sk = sock->sk;
636 struct hci_dev *hdev = NULL;
637 int len, err = 0;
638
639 BT_DBG("sock %p sk %p", sock, sk);
640
641 if (!addr)
642 return -EINVAL;
643
644 memset(&haddr, 0, sizeof(haddr));
645 len = min_t(unsigned int, sizeof(haddr), addr_len);
646 memcpy(&haddr, addr, len);
647
648 if (haddr.hci_family != AF_BLUETOOTH)
649 return -EINVAL;
650
651 lock_sock(sk);
652
653 if (sk->sk_state == BT_BOUND) {
654 err = -EALREADY;
655 goto done;
656 }
657
658 switch (haddr.hci_channel) {
659 case HCI_CHANNEL_RAW:
660 if (hci_pi(sk)->hdev) {
661 err = -EALREADY;
662 goto done;
663 }
664
665 if (haddr.hci_dev != HCI_DEV_NONE) {
666 hdev = hci_dev_get(haddr.hci_dev);
667 if (!hdev) {
668 err = -ENODEV;
669 goto done;
670 }
671
672 atomic_inc(&hdev->promisc);
673 }
674
675 hci_pi(sk)->hdev = hdev;
676 break;
677
678 case HCI_CHANNEL_USER:
679 if (hci_pi(sk)->hdev) {
680 err = -EALREADY;
681 goto done;
682 }
683
684 if (haddr.hci_dev == HCI_DEV_NONE) {
685 err = -EINVAL;
686 goto done;
687 }
688
689 if (!capable(CAP_NET_ADMIN)) {
690 err = -EPERM;
691 goto done;
692 }
693
694 hdev = hci_dev_get(haddr.hci_dev);
695 if (!hdev) {
696 err = -ENODEV;
697 goto done;
698 }
699
700 if (test_bit(HCI_UP, &hdev->flags) ||
701 test_bit(HCI_INIT, &hdev->flags) ||
702 test_bit(HCI_SETUP, &hdev->dev_flags)) {
703 err = -EBUSY;
704 hci_dev_put(hdev);
705 goto done;
706 }
707
708 if (test_and_set_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
709 err = -EUSERS;
710 hci_dev_put(hdev);
711 goto done;
712 }
713
714 mgmt_index_removed(hdev);
715
716 err = hci_dev_open(hdev->id);
717 if (err) {
718 clear_bit(HCI_USER_CHANNEL, &hdev->dev_flags);
719 hci_dev_put(hdev);
720 goto done;
721 }
722
723 atomic_inc(&hdev->promisc);
724
725 hci_pi(sk)->hdev = hdev;
726 break;
727
728 case HCI_CHANNEL_CONTROL:
729 if (haddr.hci_dev != HCI_DEV_NONE) {
730 err = -EINVAL;
731 goto done;
732 }
733
734 if (!capable(CAP_NET_ADMIN)) {
735 err = -EPERM;
736 goto done;
737 }
738
739 break;
740
741 case HCI_CHANNEL_MONITOR:
742 if (haddr.hci_dev != HCI_DEV_NONE) {
743 err = -EINVAL;
744 goto done;
745 }
746
747 if (!capable(CAP_NET_RAW)) {
748 err = -EPERM;
749 goto done;
750 }
751
752 send_monitor_replay(sk);
753
754 atomic_inc(&monitor_promisc);
755 break;
756
757 default:
758 err = -EINVAL;
759 goto done;
760 }
761
762
763 hci_pi(sk)->channel = haddr.hci_channel;
764 sk->sk_state = BT_BOUND;
765
766 done:
767 release_sock(sk);
768 return err;
769 }
770
771 static int hci_sock_getname(struct socket *sock, struct sockaddr *addr,
772 int *addr_len, int peer)
773 {
774 struct sockaddr_hci *haddr = (struct sockaddr_hci *) addr;
775 struct sock *sk = sock->sk;
776 struct hci_dev *hdev;
777 int err = 0;
778
779 BT_DBG("sock %p sk %p", sock, sk);
780
781 if (peer)
782 return -EOPNOTSUPP;
783
784 lock_sock(sk);
785
786 hdev = hci_pi(sk)->hdev;
787 if (!hdev) {
788 err = -EBADFD;
789 goto done;
790 }
791
792 *addr_len = sizeof(*haddr);
793 haddr->hci_family = AF_BLUETOOTH;
794 haddr->hci_dev = hdev->id;
795 haddr->hci_channel= hci_pi(sk)->channel;
796
797 done:
798 release_sock(sk);
799 return err;
800 }
801
802 static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg,
803 struct sk_buff *skb)
804 {
805 __u32 mask = hci_pi(sk)->cmsg_mask;
806
807 if (mask & HCI_CMSG_DIR) {
808 int incoming = bt_cb(skb)->incoming;
809 put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming),
810 &incoming);
811 }
812
813 if (mask & HCI_CMSG_TSTAMP) {
814 #ifdef CONFIG_COMPAT
815 struct compat_timeval ctv;
816 #endif
817 struct timeval tv;
818 void *data;
819 int len;
820
821 skb_get_timestamp(skb, &tv);
822
823 data = &tv;
824 len = sizeof(tv);
825 #ifdef CONFIG_COMPAT
826 if (!COMPAT_USE_64BIT_TIME &&
827 (msg->msg_flags & MSG_CMSG_COMPAT)) {
828 ctv.tv_sec = tv.tv_sec;
829 ctv.tv_usec = tv.tv_usec;
830 data = &ctv;
831 len = sizeof(ctv);
832 }
833 #endif
834
835 put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data);
836 }
837 }
838
839 static int hci_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
840 struct msghdr *msg, size_t len, int flags)
841 {
842 int noblock = flags & MSG_DONTWAIT;
843 struct sock *sk = sock->sk;
844 struct sk_buff *skb;
845 int copied, err;
846
847 BT_DBG("sock %p, sk %p", sock, sk);
848
849 if (flags & (MSG_OOB))
850 return -EOPNOTSUPP;
851
852 if (sk->sk_state == BT_CLOSED)
853 return 0;
854
855 skb = skb_recv_datagram(sk, flags, noblock, &err);
856 if (!skb)
857 return err;
858
859 copied = skb->len;
860 if (len < copied) {
861 msg->msg_flags |= MSG_TRUNC;
862 copied = len;
863 }
864
865 skb_reset_transport_header(skb);
866 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
867
868 switch (hci_pi(sk)->channel) {
869 case HCI_CHANNEL_RAW:
870 hci_sock_cmsg(sk, msg, skb);
871 break;
872 case HCI_CHANNEL_USER:
873 case HCI_CHANNEL_CONTROL:
874 case HCI_CHANNEL_MONITOR:
875 sock_recv_timestamp(msg, sk, skb);
876 break;
877 }
878
879 skb_free_datagram(sk, skb);
880
881 return err ? : copied;
882 }
883
884 static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
885 struct msghdr *msg, size_t len)
886 {
887 struct sock *sk = sock->sk;
888 struct hci_dev *hdev;
889 struct sk_buff *skb;
890 int err;
891
892 BT_DBG("sock %p sk %p", sock, sk);
893
894 if (msg->msg_flags & MSG_OOB)
895 return -EOPNOTSUPP;
896
897 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE))
898 return -EINVAL;
899
900 if (len < 4 || len > HCI_MAX_FRAME_SIZE)
901 return -EINVAL;
902
903 lock_sock(sk);
904
905 switch (hci_pi(sk)->channel) {
906 case HCI_CHANNEL_RAW:
907 case HCI_CHANNEL_USER:
908 break;
909 case HCI_CHANNEL_CONTROL:
910 err = mgmt_control(sk, msg, len);
911 goto done;
912 case HCI_CHANNEL_MONITOR:
913 err = -EOPNOTSUPP;
914 goto done;
915 default:
916 err = -EINVAL;
917 goto done;
918 }
919
920 hdev = hci_pi(sk)->hdev;
921 if (!hdev) {
922 err = -EBADFD;
923 goto done;
924 }
925
926 if (!test_bit(HCI_UP, &hdev->flags)) {
927 err = -ENETDOWN;
928 goto done;
929 }
930
931 skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
932 if (!skb)
933 goto done;
934
935 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
936 err = -EFAULT;
937 goto drop;
938 }
939
940 bt_cb(skb)->pkt_type = *((unsigned char *) skb->data);
941 skb_pull(skb, 1);
942
943 if (hci_pi(sk)->channel == HCI_CHANNEL_RAW &&
944 bt_cb(skb)->pkt_type == HCI_COMMAND_PKT) {
945 u16 opcode = get_unaligned_le16(skb->data);
946 u16 ogf = hci_opcode_ogf(opcode);
947 u16 ocf = hci_opcode_ocf(opcode);
948
949 if (((ogf > HCI_SFLT_MAX_OGF) ||
950 !hci_test_bit(ocf & HCI_FLT_OCF_BITS,
951 &hci_sec_filter.ocf_mask[ogf])) &&
952 !capable(CAP_NET_RAW)) {
953 err = -EPERM;
954 goto drop;
955 }
956
957 if (test_bit(HCI_RAW, &hdev->flags) || (ogf == 0x3f)) {
958 skb_queue_tail(&hdev->raw_q, skb);
959 queue_work(hdev->workqueue, &hdev->tx_work);
960 } else {
961 /* Stand-alone HCI commands must be flaged as
962 * single-command requests.
963 */
964 bt_cb(skb)->req.start = true;
965
966 skb_queue_tail(&hdev->cmd_q, skb);
967 queue_work(hdev->workqueue, &hdev->cmd_work);
968 }
969 } else {
970 if (!capable(CAP_NET_RAW)) {
971 err = -EPERM;
972 goto drop;
973 }
974
975 if (hci_pi(sk)->channel == HCI_CHANNEL_USER &&
976 bt_cb(skb)->pkt_type != HCI_COMMAND_PKT &&
977 bt_cb(skb)->pkt_type != HCI_ACLDATA_PKT &&
978 bt_cb(skb)->pkt_type != HCI_SCODATA_PKT) {
979 err = -EINVAL;
980 goto drop;
981 }
982
983 skb_queue_tail(&hdev->raw_q, skb);
984 queue_work(hdev->workqueue, &hdev->tx_work);
985 }
986
987 err = len;
988
989 done:
990 release_sock(sk);
991 return err;
992
993 drop:
994 kfree_skb(skb);
995 goto done;
996 }
997
998 static int hci_sock_setsockopt(struct socket *sock, int level, int optname,
999 char __user *optval, unsigned int len)
1000 {
1001 struct hci_ufilter uf = { .opcode = 0 };
1002 struct sock *sk = sock->sk;
1003 int err = 0, opt = 0;
1004
1005 BT_DBG("sk %p, opt %d", sk, optname);
1006
1007 lock_sock(sk);
1008
1009 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
1010 err = -EBADFD;
1011 goto done;
1012 }
1013
1014 switch (optname) {
1015 case HCI_DATA_DIR:
1016 if (get_user(opt, (int __user *)optval)) {
1017 err = -EFAULT;
1018 break;
1019 }
1020
1021 if (opt)
1022 hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR;
1023 else
1024 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR;
1025 break;
1026
1027 case HCI_TIME_STAMP:
1028 if (get_user(opt, (int __user *)optval)) {
1029 err = -EFAULT;
1030 break;
1031 }
1032
1033 if (opt)
1034 hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP;
1035 else
1036 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP;
1037 break;
1038
1039 case HCI_FILTER:
1040 {
1041 struct hci_filter *f = &hci_pi(sk)->filter;
1042
1043 uf.type_mask = f->type_mask;
1044 uf.opcode = f->opcode;
1045 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
1046 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
1047 }
1048
1049 len = min_t(unsigned int, len, sizeof(uf));
1050 if (copy_from_user(&uf, optval, len)) {
1051 err = -EFAULT;
1052 break;
1053 }
1054
1055 if (!capable(CAP_NET_RAW)) {
1056 uf.type_mask &= hci_sec_filter.type_mask;
1057 uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0);
1058 uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1);
1059 }
1060
1061 {
1062 struct hci_filter *f = &hci_pi(sk)->filter;
1063
1064 f->type_mask = uf.type_mask;
1065 f->opcode = uf.opcode;
1066 *((u32 *) f->event_mask + 0) = uf.event_mask[0];
1067 *((u32 *) f->event_mask + 1) = uf.event_mask[1];
1068 }
1069 break;
1070
1071 default:
1072 err = -ENOPROTOOPT;
1073 break;
1074 }
1075
1076 done:
1077 release_sock(sk);
1078 return err;
1079 }
1080
1081 static int hci_sock_getsockopt(struct socket *sock, int level, int optname,
1082 char __user *optval, int __user *optlen)
1083 {
1084 struct hci_ufilter uf;
1085 struct sock *sk = sock->sk;
1086 int len, opt, err = 0;
1087
1088 BT_DBG("sk %p, opt %d", sk, optname);
1089
1090 if (get_user(len, optlen))
1091 return -EFAULT;
1092
1093 lock_sock(sk);
1094
1095 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
1096 err = -EBADFD;
1097 goto done;
1098 }
1099
1100 switch (optname) {
1101 case HCI_DATA_DIR:
1102 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR)
1103 opt = 1;
1104 else
1105 opt = 0;
1106
1107 if (put_user(opt, optval))
1108 err = -EFAULT;
1109 break;
1110
1111 case HCI_TIME_STAMP:
1112 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP)
1113 opt = 1;
1114 else
1115 opt = 0;
1116
1117 if (put_user(opt, optval))
1118 err = -EFAULT;
1119 break;
1120
1121 case HCI_FILTER:
1122 {
1123 struct hci_filter *f = &hci_pi(sk)->filter;
1124
1125 memset(&uf, 0, sizeof(uf));
1126 uf.type_mask = f->type_mask;
1127 uf.opcode = f->opcode;
1128 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
1129 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
1130 }
1131
1132 len = min_t(unsigned int, len, sizeof(uf));
1133 if (copy_to_user(optval, &uf, len))
1134 err = -EFAULT;
1135 break;
1136
1137 default:
1138 err = -ENOPROTOOPT;
1139 break;
1140 }
1141
1142 done:
1143 release_sock(sk);
1144 return err;
1145 }
1146
1147 static const struct proto_ops hci_sock_ops = {
1148 .family = PF_BLUETOOTH,
1149 .owner = THIS_MODULE,
1150 .release = hci_sock_release,
1151 .bind = hci_sock_bind,
1152 .getname = hci_sock_getname,
1153 .sendmsg = hci_sock_sendmsg,
1154 .recvmsg = hci_sock_recvmsg,
1155 .ioctl = hci_sock_ioctl,
1156 .poll = datagram_poll,
1157 .listen = sock_no_listen,
1158 .shutdown = sock_no_shutdown,
1159 .setsockopt = hci_sock_setsockopt,
1160 .getsockopt = hci_sock_getsockopt,
1161 .connect = sock_no_connect,
1162 .socketpair = sock_no_socketpair,
1163 .accept = sock_no_accept,
1164 .mmap = sock_no_mmap
1165 };
1166
1167 static struct proto hci_sk_proto = {
1168 .name = "HCI",
1169 .owner = THIS_MODULE,
1170 .obj_size = sizeof(struct hci_pinfo)
1171 };
1172
1173 static int hci_sock_create(struct net *net, struct socket *sock, int protocol,
1174 int kern)
1175 {
1176 struct sock *sk;
1177
1178 BT_DBG("sock %p", sock);
1179
1180 if (sock->type != SOCK_RAW)
1181 return -ESOCKTNOSUPPORT;
1182
1183 sock->ops = &hci_sock_ops;
1184
1185 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto);
1186 if (!sk)
1187 return -ENOMEM;
1188
1189 sock_init_data(sock, sk);
1190
1191 sock_reset_flag(sk, SOCK_ZAPPED);
1192
1193 sk->sk_protocol = protocol;
1194
1195 sock->state = SS_UNCONNECTED;
1196 sk->sk_state = BT_OPEN;
1197
1198 bt_sock_link(&hci_sk_list, sk);
1199 return 0;
1200 }
1201
1202 static const struct net_proto_family hci_sock_family_ops = {
1203 .family = PF_BLUETOOTH,
1204 .owner = THIS_MODULE,
1205 .create = hci_sock_create,
1206 };
1207
1208 int __init hci_sock_init(void)
1209 {
1210 int err;
1211
1212 err = proto_register(&hci_sk_proto, 0);
1213 if (err < 0)
1214 return err;
1215
1216 err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops);
1217 if (err < 0) {
1218 BT_ERR("HCI socket registration failed");
1219 goto error;
1220 }
1221
1222 err = bt_procfs_init(&init_net, "hci", &hci_sk_list, NULL);
1223 if (err < 0) {
1224 BT_ERR("Failed to create HCI proc file");
1225 bt_sock_unregister(BTPROTO_HCI);
1226 goto error;
1227 }
1228
1229 BT_INFO("HCI socket layer initialized");
1230
1231 return 0;
1232
1233 error:
1234 proto_unregister(&hci_sk_proto);
1235 return err;
1236 }
1237
1238 void hci_sock_cleanup(void)
1239 {
1240 bt_procfs_cleanup(&init_net, "hci");
1241 bt_sock_unregister(BTPROTO_HCI);
1242 proto_unregister(&hci_sk_proto);
1243 }
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