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net/xfrm/xfrm_output.c: move EXPORT_SYMBOL
[deliverable/linux.git] / net / bluetooth / hci_sock.c
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 = cpu_to_le16(HCI_MON_COMMAND_PKT);
215 break;
216 case HCI_EVENT_PKT:
217 opcode = cpu_to_le16(HCI_MON_EVENT_PKT);
218 break;
219 case HCI_ACLDATA_PKT:
220 if (bt_cb(skb)->incoming)
221 opcode = cpu_to_le16(HCI_MON_ACL_RX_PKT);
222 else
223 opcode = cpu_to_le16(HCI_MON_ACL_TX_PKT);
224 break;
225 case HCI_SCODATA_PKT:
226 if (bt_cb(skb)->incoming)
227 opcode = cpu_to_le16(HCI_MON_SCO_RX_PKT);
228 else
229 opcode = 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 = 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 = 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 mgmt_index_added(hdev);
720 hci_dev_put(hdev);
721 goto done;
722 }
723
724 atomic_inc(&hdev->promisc);
725
726 hci_pi(sk)->hdev = hdev;
727 break;
728
729 case HCI_CHANNEL_CONTROL:
730 if (haddr.hci_dev != HCI_DEV_NONE) {
731 err = -EINVAL;
732 goto done;
733 }
734
735 if (!capable(CAP_NET_ADMIN)) {
736 err = -EPERM;
737 goto done;
738 }
739
740 break;
741
742 case HCI_CHANNEL_MONITOR:
743 if (haddr.hci_dev != HCI_DEV_NONE) {
744 err = -EINVAL;
745 goto done;
746 }
747
748 if (!capable(CAP_NET_RAW)) {
749 err = -EPERM;
750 goto done;
751 }
752
753 send_monitor_replay(sk);
754
755 atomic_inc(&monitor_promisc);
756 break;
757
758 default:
759 err = -EINVAL;
760 goto done;
761 }
762
763
764 hci_pi(sk)->channel = haddr.hci_channel;
765 sk->sk_state = BT_BOUND;
766
767 done:
768 release_sock(sk);
769 return err;
770 }
771
772 static int hci_sock_getname(struct socket *sock, struct sockaddr *addr,
773 int *addr_len, int peer)
774 {
775 struct sockaddr_hci *haddr = (struct sockaddr_hci *) addr;
776 struct sock *sk = sock->sk;
777 struct hci_dev *hdev;
778 int err = 0;
779
780 BT_DBG("sock %p sk %p", sock, sk);
781
782 if (peer)
783 return -EOPNOTSUPP;
784
785 lock_sock(sk);
786
787 hdev = hci_pi(sk)->hdev;
788 if (!hdev) {
789 err = -EBADFD;
790 goto done;
791 }
792
793 *addr_len = sizeof(*haddr);
794 haddr->hci_family = AF_BLUETOOTH;
795 haddr->hci_dev = hdev->id;
796 haddr->hci_channel= hci_pi(sk)->channel;
797
798 done:
799 release_sock(sk);
800 return err;
801 }
802
803 static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg,
804 struct sk_buff *skb)
805 {
806 __u32 mask = hci_pi(sk)->cmsg_mask;
807
808 if (mask & HCI_CMSG_DIR) {
809 int incoming = bt_cb(skb)->incoming;
810 put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming),
811 &incoming);
812 }
813
814 if (mask & HCI_CMSG_TSTAMP) {
815 #ifdef CONFIG_COMPAT
816 struct compat_timeval ctv;
817 #endif
818 struct timeval tv;
819 void *data;
820 int len;
821
822 skb_get_timestamp(skb, &tv);
823
824 data = &tv;
825 len = sizeof(tv);
826 #ifdef CONFIG_COMPAT
827 if (!COMPAT_USE_64BIT_TIME &&
828 (msg->msg_flags & MSG_CMSG_COMPAT)) {
829 ctv.tv_sec = tv.tv_sec;
830 ctv.tv_usec = tv.tv_usec;
831 data = &ctv;
832 len = sizeof(ctv);
833 }
834 #endif
835
836 put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data);
837 }
838 }
839
840 static int hci_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
841 struct msghdr *msg, size_t len, int flags)
842 {
843 int noblock = flags & MSG_DONTWAIT;
844 struct sock *sk = sock->sk;
845 struct sk_buff *skb;
846 int copied, err;
847
848 BT_DBG("sock %p, sk %p", sock, sk);
849
850 if (flags & (MSG_OOB))
851 return -EOPNOTSUPP;
852
853 if (sk->sk_state == BT_CLOSED)
854 return 0;
855
856 skb = skb_recv_datagram(sk, flags, noblock, &err);
857 if (!skb)
858 return err;
859
860 copied = skb->len;
861 if (len < copied) {
862 msg->msg_flags |= MSG_TRUNC;
863 copied = len;
864 }
865
866 skb_reset_transport_header(skb);
867 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
868
869 switch (hci_pi(sk)->channel) {
870 case HCI_CHANNEL_RAW:
871 hci_sock_cmsg(sk, msg, skb);
872 break;
873 case HCI_CHANNEL_USER:
874 case HCI_CHANNEL_CONTROL:
875 case HCI_CHANNEL_MONITOR:
876 sock_recv_timestamp(msg, sk, skb);
877 break;
878 }
879
880 skb_free_datagram(sk, skb);
881
882 return err ? : copied;
883 }
884
885 static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
886 struct msghdr *msg, size_t len)
887 {
888 struct sock *sk = sock->sk;
889 struct hci_dev *hdev;
890 struct sk_buff *skb;
891 int err;
892
893 BT_DBG("sock %p sk %p", sock, sk);
894
895 if (msg->msg_flags & MSG_OOB)
896 return -EOPNOTSUPP;
897
898 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE))
899 return -EINVAL;
900
901 if (len < 4 || len > HCI_MAX_FRAME_SIZE)
902 return -EINVAL;
903
904 lock_sock(sk);
905
906 switch (hci_pi(sk)->channel) {
907 case HCI_CHANNEL_RAW:
908 case HCI_CHANNEL_USER:
909 break;
910 case HCI_CHANNEL_CONTROL:
911 err = mgmt_control(sk, msg, len);
912 goto done;
913 case HCI_CHANNEL_MONITOR:
914 err = -EOPNOTSUPP;
915 goto done;
916 default:
917 err = -EINVAL;
918 goto done;
919 }
920
921 hdev = hci_pi(sk)->hdev;
922 if (!hdev) {
923 err = -EBADFD;
924 goto done;
925 }
926
927 if (!test_bit(HCI_UP, &hdev->flags)) {
928 err = -ENETDOWN;
929 goto done;
930 }
931
932 skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
933 if (!skb)
934 goto done;
935
936 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
937 err = -EFAULT;
938 goto drop;
939 }
940
941 bt_cb(skb)->pkt_type = *((unsigned char *) skb->data);
942 skb_pull(skb, 1);
943
944 if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
945 /* No permission check is needed for user channel
946 * since that gets enforced when binding the socket.
947 *
948 * However check that the packet type is valid.
949 */
950 if (bt_cb(skb)->pkt_type != HCI_COMMAND_PKT &&
951 bt_cb(skb)->pkt_type != HCI_ACLDATA_PKT &&
952 bt_cb(skb)->pkt_type != HCI_SCODATA_PKT) {
953 err = -EINVAL;
954 goto drop;
955 }
956
957 skb_queue_tail(&hdev->raw_q, skb);
958 queue_work(hdev->workqueue, &hdev->tx_work);
959 } else if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT) {
960 u16 opcode = get_unaligned_le16(skb->data);
961 u16 ogf = hci_opcode_ogf(opcode);
962 u16 ocf = hci_opcode_ocf(opcode);
963
964 if (((ogf > HCI_SFLT_MAX_OGF) ||
965 !hci_test_bit(ocf & HCI_FLT_OCF_BITS,
966 &hci_sec_filter.ocf_mask[ogf])) &&
967 !capable(CAP_NET_RAW)) {
968 err = -EPERM;
969 goto drop;
970 }
971
972 if (test_bit(HCI_RAW, &hdev->flags) || (ogf == 0x3f)) {
973 skb_queue_tail(&hdev->raw_q, skb);
974 queue_work(hdev->workqueue, &hdev->tx_work);
975 } else {
976 /* Stand-alone HCI commands must be flaged as
977 * single-command requests.
978 */
979 bt_cb(skb)->req.start = true;
980
981 skb_queue_tail(&hdev->cmd_q, skb);
982 queue_work(hdev->workqueue, &hdev->cmd_work);
983 }
984 } else {
985 if (!capable(CAP_NET_RAW)) {
986 err = -EPERM;
987 goto drop;
988 }
989
990 skb_queue_tail(&hdev->raw_q, skb);
991 queue_work(hdev->workqueue, &hdev->tx_work);
992 }
993
994 err = len;
995
996 done:
997 release_sock(sk);
998 return err;
999
1000 drop:
1001 kfree_skb(skb);
1002 goto done;
1003 }
1004
1005 static int hci_sock_setsockopt(struct socket *sock, int level, int optname,
1006 char __user *optval, unsigned int len)
1007 {
1008 struct hci_ufilter uf = { .opcode = 0 };
1009 struct sock *sk = sock->sk;
1010 int err = 0, opt = 0;
1011
1012 BT_DBG("sk %p, opt %d", sk, optname);
1013
1014 lock_sock(sk);
1015
1016 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
1017 err = -EBADFD;
1018 goto done;
1019 }
1020
1021 switch (optname) {
1022 case HCI_DATA_DIR:
1023 if (get_user(opt, (int __user *)optval)) {
1024 err = -EFAULT;
1025 break;
1026 }
1027
1028 if (opt)
1029 hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR;
1030 else
1031 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR;
1032 break;
1033
1034 case HCI_TIME_STAMP:
1035 if (get_user(opt, (int __user *)optval)) {
1036 err = -EFAULT;
1037 break;
1038 }
1039
1040 if (opt)
1041 hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP;
1042 else
1043 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP;
1044 break;
1045
1046 case HCI_FILTER:
1047 {
1048 struct hci_filter *f = &hci_pi(sk)->filter;
1049
1050 uf.type_mask = f->type_mask;
1051 uf.opcode = f->opcode;
1052 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
1053 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
1054 }
1055
1056 len = min_t(unsigned int, len, sizeof(uf));
1057 if (copy_from_user(&uf, optval, len)) {
1058 err = -EFAULT;
1059 break;
1060 }
1061
1062 if (!capable(CAP_NET_RAW)) {
1063 uf.type_mask &= hci_sec_filter.type_mask;
1064 uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0);
1065 uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1);
1066 }
1067
1068 {
1069 struct hci_filter *f = &hci_pi(sk)->filter;
1070
1071 f->type_mask = uf.type_mask;
1072 f->opcode = uf.opcode;
1073 *((u32 *) f->event_mask + 0) = uf.event_mask[0];
1074 *((u32 *) f->event_mask + 1) = uf.event_mask[1];
1075 }
1076 break;
1077
1078 default:
1079 err = -ENOPROTOOPT;
1080 break;
1081 }
1082
1083 done:
1084 release_sock(sk);
1085 return err;
1086 }
1087
1088 static int hci_sock_getsockopt(struct socket *sock, int level, int optname,
1089 char __user *optval, int __user *optlen)
1090 {
1091 struct hci_ufilter uf;
1092 struct sock *sk = sock->sk;
1093 int len, opt, err = 0;
1094
1095 BT_DBG("sk %p, opt %d", sk, optname);
1096
1097 if (get_user(len, optlen))
1098 return -EFAULT;
1099
1100 lock_sock(sk);
1101
1102 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
1103 err = -EBADFD;
1104 goto done;
1105 }
1106
1107 switch (optname) {
1108 case HCI_DATA_DIR:
1109 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR)
1110 opt = 1;
1111 else
1112 opt = 0;
1113
1114 if (put_user(opt, optval))
1115 err = -EFAULT;
1116 break;
1117
1118 case HCI_TIME_STAMP:
1119 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP)
1120 opt = 1;
1121 else
1122 opt = 0;
1123
1124 if (put_user(opt, optval))
1125 err = -EFAULT;
1126 break;
1127
1128 case HCI_FILTER:
1129 {
1130 struct hci_filter *f = &hci_pi(sk)->filter;
1131
1132 memset(&uf, 0, sizeof(uf));
1133 uf.type_mask = f->type_mask;
1134 uf.opcode = f->opcode;
1135 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
1136 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
1137 }
1138
1139 len = min_t(unsigned int, len, sizeof(uf));
1140 if (copy_to_user(optval, &uf, len))
1141 err = -EFAULT;
1142 break;
1143
1144 default:
1145 err = -ENOPROTOOPT;
1146 break;
1147 }
1148
1149 done:
1150 release_sock(sk);
1151 return err;
1152 }
1153
1154 static const struct proto_ops hci_sock_ops = {
1155 .family = PF_BLUETOOTH,
1156 .owner = THIS_MODULE,
1157 .release = hci_sock_release,
1158 .bind = hci_sock_bind,
1159 .getname = hci_sock_getname,
1160 .sendmsg = hci_sock_sendmsg,
1161 .recvmsg = hci_sock_recvmsg,
1162 .ioctl = hci_sock_ioctl,
1163 .poll = datagram_poll,
1164 .listen = sock_no_listen,
1165 .shutdown = sock_no_shutdown,
1166 .setsockopt = hci_sock_setsockopt,
1167 .getsockopt = hci_sock_getsockopt,
1168 .connect = sock_no_connect,
1169 .socketpair = sock_no_socketpair,
1170 .accept = sock_no_accept,
1171 .mmap = sock_no_mmap
1172 };
1173
1174 static struct proto hci_sk_proto = {
1175 .name = "HCI",
1176 .owner = THIS_MODULE,
1177 .obj_size = sizeof(struct hci_pinfo)
1178 };
1179
1180 static int hci_sock_create(struct net *net, struct socket *sock, int protocol,
1181 int kern)
1182 {
1183 struct sock *sk;
1184
1185 BT_DBG("sock %p", sock);
1186
1187 if (sock->type != SOCK_RAW)
1188 return -ESOCKTNOSUPPORT;
1189
1190 sock->ops = &hci_sock_ops;
1191
1192 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto);
1193 if (!sk)
1194 return -ENOMEM;
1195
1196 sock_init_data(sock, sk);
1197
1198 sock_reset_flag(sk, SOCK_ZAPPED);
1199
1200 sk->sk_protocol = protocol;
1201
1202 sock->state = SS_UNCONNECTED;
1203 sk->sk_state = BT_OPEN;
1204
1205 bt_sock_link(&hci_sk_list, sk);
1206 return 0;
1207 }
1208
1209 static const struct net_proto_family hci_sock_family_ops = {
1210 .family = PF_BLUETOOTH,
1211 .owner = THIS_MODULE,
1212 .create = hci_sock_create,
1213 };
1214
1215 int __init hci_sock_init(void)
1216 {
1217 int err;
1218
1219 err = proto_register(&hci_sk_proto, 0);
1220 if (err < 0)
1221 return err;
1222
1223 err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops);
1224 if (err < 0) {
1225 BT_ERR("HCI socket registration failed");
1226 goto error;
1227 }
1228
1229 err = bt_procfs_init(&init_net, "hci", &hci_sk_list, NULL);
1230 if (err < 0) {
1231 BT_ERR("Failed to create HCI proc file");
1232 bt_sock_unregister(BTPROTO_HCI);
1233 goto error;
1234 }
1235
1236 BT_INFO("HCI socket layer initialized");
1237
1238 return 0;
1239
1240 error:
1241 proto_unregister(&hci_sk_proto);
1242 return err;
1243 }
1244
1245 void hci_sock_cleanup(void)
1246 {
1247 bt_procfs_cleanup(&init_net, "hci");
1248 bt_sock_unregister(BTPROTO_HCI);
1249 proto_unregister(&hci_sk_proto);
1250 }
Linux kernel - Deliverables
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