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ASoC: Merge up v6.6-rc7
[linux-block.git] / net / bluetooth / hci_sock.c
CommitLineData
8e87d142 1/*
1da177e4
LT		 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
8e87d142
YH		 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
1da177e4
LT		 18 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19
8e87d142
YH		 20 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
21 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4
LT		 22 SOFTWARE IS DISCLAIMED.
23*/
24
25/* Bluetooth HCI sockets. */
7a6038b3 26#include <linux/compat.h>
8c520a59 27#include <linux/export.h>
787b306c 28#include <linux/utsname.h>
70ecce91 29#include <linux/sched.h>
1da177e4
LT		 30#include <asm/unaligned.h>
31
32#include <net/bluetooth/bluetooth.h>
33#include <net/bluetooth/hci_core.h>
cd82e61c 34#include <net/bluetooth/hci_mon.h>
fa4335d7
JH		 35#include <net/bluetooth/mgmt.h>
36
37#include "mgmt_util.h"
1da177e4 38
801c1e8d
JH		 39static LIST_HEAD(mgmt_chan_list);
40static DEFINE_MUTEX(mgmt_chan_list_lock);
41
70ecce91
MH		 42static DEFINE_IDA(sock_cookie_ida);
43
cd82e61c
MH		 44static atomic_t monitor_promisc = ATOMIC_INIT(0);
45
1da177e4
LT		 46/* ----- HCI socket interface ----- */
47
863def58
MH		 48/* Socket info */
49#define hci_pi(sk) ((struct hci_pinfo *) sk)
50
51struct hci_pinfo {
52 struct bt_sock bt;
53 struct hci_dev *hdev;
54 struct hci_filter filter;
32929e1f 55 __u8 cmsg_mask;
863def58 56 unsigned short channel;
6befc644 57 unsigned long flags;
70ecce91
MH		 58 __u32 cookie;
59 char comm[TASK_COMM_LEN];
09572fca 60 __u16 mtu;
863def58
MH		 61};
62
e0448092
TH		 63static struct hci_dev *hci_hdev_from_sock(struct sock *sk)
64{
65 struct hci_dev *hdev = hci_pi(sk)->hdev;
66
67 if (!hdev)
68 return ERR_PTR(-EBADFD);
69 if (hci_dev_test_flag(hdev, HCI_UNREGISTER))
70 return ERR_PTR(-EPIPE);
71 return hdev;
72}
73
6befc644
MH		 74void hci_sock_set_flag(struct sock *sk, int nr)
75{
76 set_bit(nr, &hci_pi(sk)->flags);
77}
78
79void hci_sock_clear_flag(struct sock *sk, int nr)
80{
81 clear_bit(nr, &hci_pi(sk)->flags);
82}
83
c85be545
MH		 84int hci_sock_test_flag(struct sock *sk, int nr)
85{
86 return test_bit(nr, &hci_pi(sk)->flags);
87}
88
d0f172b1
JH		 89unsigned short hci_sock_get_channel(struct sock *sk)
90{
91 return hci_pi(sk)->channel;
92}
93
70ecce91
MH		 94u32 hci_sock_get_cookie(struct sock *sk)
95{
96 return hci_pi(sk)->cookie;
97}
98
df1cb87a
MH		 99static bool hci_sock_gen_cookie(struct sock *sk)
100{
101 int id = hci_pi(sk)->cookie;
102
103 if (!id) {
104 id = ida_simple_get(&sock_cookie_ida, 1, 0, GFP_KERNEL);
105 if (id < 0)
106 id = 0xffffffff;
107
108 hci_pi(sk)->cookie = id;
109 get_task_comm(hci_pi(sk)->comm, current);
110 return true;
111 }
112
113 return false;
114}
115
116static void hci_sock_free_cookie(struct sock *sk)
117{
118 int id = hci_pi(sk)->cookie;
119
120 if (id) {
121 hci_pi(sk)->cookie = 0xffffffff;
122 ida_simple_remove(&sock_cookie_ida, id);
123 }
124}
125
9391976a 126static inline int hci_test_bit(int nr, const void *addr)
1da177e4 127{
9391976a 128 return *((const __u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31));
1da177e4
LT		 129}
130
131/* Security filter */
3ad254f7
MH		 132#define HCI_SFLT_MAX_OGF 5
133
134struct hci_sec_filter {
135 __u32 type_mask;
136 __u32 event_mask[2];
137 __u32 ocf_mask[HCI_SFLT_MAX_OGF + 1][4];
138};
139
7e67c112 140static const struct hci_sec_filter hci_sec_filter = {
1da177e4
LT		 141 /* Packet types */
142 0x10,
143 /* Events */
dd7f5527 144 { 0x1000d9fe, 0x0000b00c },
1da177e4
LT		 145 /* Commands */
146 {
147 { 0x0 },
148 /* OGF_LINK_CTL */
7c631a67 149 { 0xbe000006, 0x00000001, 0x00000000, 0x00 },
1da177e4 150 /* OGF_LINK_POLICY */
7c631a67 151 { 0x00005200, 0x00000000, 0x00000000, 0x00 },
1da177e4 152 /* OGF_HOST_CTL */
7c631a67 153 { 0xaab00200, 0x2b402aaa, 0x05220154, 0x00 },
1da177e4 154 /* OGF_INFO_PARAM */
7c631a67 155 { 0x000002be, 0x00000000, 0x00000000, 0x00 },
1da177e4 156 /* OGF_STATUS_PARAM */
7c631a67 157 { 0x000000ea, 0x00000000, 0x00000000, 0x00 }
1da177e4
LT		 158 }
159};
160
161static struct bt_sock_list hci_sk_list = {
d5fb2962 162 .lock = __RW_LOCK_UNLOCKED(hci_sk_list.lock)
1da177e4
LT		 163};
164
f81fe64f
MH		 165static bool is_filtered_packet(struct sock *sk, struct sk_buff *skb)
166{
167 struct hci_filter *flt;
168 int flt_type, flt_event;
169
170 /* Apply filter */
171 flt = &hci_pi(sk)->filter;
172
d79f34e3 173 flt_type = hci_skb_pkt_type(skb) & HCI_FLT_TYPE_BITS;
f81fe64f
MH		 174
175 if (!test_bit(flt_type, &flt->type_mask))
176 return true;
177
178 /* Extra filter for event packets only */
d79f34e3 179 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT)
f81fe64f
MH		 180 return false;
181
182 flt_event = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS);
183
184 if (!hci_test_bit(flt_event, &flt->event_mask))
185 return true;
186
187 /* Check filter only when opcode is set */
188 if (!flt->opcode)
189 return false;
190
191 if (flt_event == HCI_EV_CMD_COMPLETE &&
192 flt->opcode != get_unaligned((__le16 *)(skb->data + 3)))
193 return true;
194
195 if (flt_event == HCI_EV_CMD_STATUS &&
196 flt->opcode != get_unaligned((__le16 *)(skb->data + 4)))
197 return true;
198
199 return false;
200}
201
1da177e4 202/* Send frame to RAW socket */
470fe1b5 203void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 204{
205 struct sock *sk;
e0edf373 206 struct sk_buff *skb_copy = NULL;
1da177e4
LT		 207
208 BT_DBG("hdev %p len %d", hdev, skb->len);
209
210 read_lock(&hci_sk_list.lock);
470fe1b5 211
b67bfe0d 212 sk_for_each(sk, &hci_sk_list.head) {
1da177e4
LT		 213 struct sk_buff *nskb;
214
215 if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev)
216 continue;
217
218 /* Don't send frame to the socket it came from */
219 if (skb->sk == sk)
220 continue;
221
23500189 222 if (hci_pi(sk)->channel == HCI_CHANNEL_RAW) {
d79f34e3
MH		 223 if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT &&
224 hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
225 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
cc974003
MH		 226 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
227 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT)
bb77543e 228 continue;
23500189
MH		 229 if (is_filtered_packet(sk, skb))
230 continue;
231 } else if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
232 if (!bt_cb(skb)->incoming)
233 continue;
d79f34e3
MH		 234 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
235 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
cc974003
MH		 236 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
237 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT)
23500189
MH		 238 continue;
239 } else {
240 /* Don't send frame to other channel types */
1da177e4 241 continue;
23500189 242 }
1da177e4 243
e0edf373
MH		 244 if (!skb_copy) {
245 /* Create a private copy with headroom */
bad93e9d 246 skb_copy = __pskb_copy_fclone(skb, 1, GFP_ATOMIC, true);
e0edf373
MH		 247 if (!skb_copy)
248 continue;
249
250 /* Put type byte before the data */
d79f34e3 251 memcpy(skb_push(skb_copy, 1), &hci_skb_pkt_type(skb), 1);
e0edf373
MH		 252 }
253
254 nskb = skb_clone(skb_copy, GFP_ATOMIC);
70f23020 255 if (!nskb)
1da177e4
LT		 256 continue;
257
470fe1b5
MH		 258 if (sock_queue_rcv_skb(sk, nskb))
259 kfree_skb(nskb);
260 }
261
262 read_unlock(&hci_sk_list.lock);
e0edf373
MH		 263
264 kfree_skb(skb_copy);
470fe1b5
MH		 265}
266
69ae5065
LAD		 267static void hci_sock_copy_creds(struct sock *sk, struct sk_buff *skb)
268{
269 struct scm_creds *creds;
270
271 if (!sk || WARN_ON(!skb))
272 return;
273
274 creds = &bt_cb(skb)->creds;
275
276 /* Check if peer credentials is set */
277 if (!sk->sk_peer_pid) {
278 /* Check if parent peer credentials is set */
279 if (bt_sk(sk)->parent && bt_sk(sk)->parent->sk_peer_pid)
280 sk = bt_sk(sk)->parent;
281 else
282 return;
283 }
284
285 /* Check if scm_creds already set */
286 if (creds->pid == pid_vnr(sk->sk_peer_pid))
287 return;
288
289 memset(creds, 0, sizeof(*creds));
290
291 creds->pid = pid_vnr(sk->sk_peer_pid);
292 if (sk->sk_peer_cred) {
293 creds->uid = sk->sk_peer_cred->uid;
294 creds->gid = sk->sk_peer_cred->gid;
295 }
296}
297
298static struct sk_buff *hci_skb_clone(struct sk_buff *skb)
299{
300 struct sk_buff *nskb;
301
302 if (!skb)
303 return NULL;
304
305 nskb = skb_clone(skb, GFP_ATOMIC);
306 if (!nskb)
307 return NULL;
308
309 hci_sock_copy_creds(skb->sk, nskb);
310
311 return nskb;
312}
313
7129069e 314/* Send frame to sockets with specific channel */
a9ee77af
SAS		 315static void __hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
316 int flag, struct sock *skip_sk)
470fe1b5
MH		 317{
318 struct sock *sk;
470fe1b5 319
7129069e 320 BT_DBG("channel %u len %d", channel, skb->len);
470fe1b5 321
b67bfe0d 322 sk_for_each(sk, &hci_sk_list.head) {
470fe1b5
MH		 323 struct sk_buff *nskb;
324
c08b1a1d 325 /* Ignore socket without the flag set */
c85be545 326 if (!hci_sock_test_flag(sk, flag))
d7f72f61
MH		 327 continue;
328
c08b1a1d
MH		 329 /* Skip the original socket */
330 if (sk == skip_sk)
17711c62
MH		 331 continue;
332
333 if (sk->sk_state != BT_BOUND)
334 continue;
335
336 if (hci_pi(sk)->channel != channel)
337 continue;
338
69ae5065 339 nskb = hci_skb_clone(skb);
17711c62
MH		 340 if (!nskb)
341 continue;
342
343 if (sock_queue_rcv_skb(sk, nskb))
344 kfree_skb(nskb);
345 }
346
a9ee77af
SAS		 347}
348
349void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
350 int flag, struct sock *skip_sk)
351{
352 read_lock(&hci_sk_list.lock);
353 __hci_send_to_channel(channel, skb, flag, skip_sk);
17711c62
MH		 354 read_unlock(&hci_sk_list.lock);
355}
356
cd82e61c
MH		 357/* Send frame to monitor socket */
358void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb)
359{
cd82e61c 360 struct sk_buff *skb_copy = NULL;
2b531294 361 struct hci_mon_hdr *hdr;
cd82e61c
MH		 362 __le16 opcode;
363
364 if (!atomic_read(&monitor_promisc))
365 return;
366
367 BT_DBG("hdev %p len %d", hdev, skb->len);
368
d79f34e3 369 switch (hci_skb_pkt_type(skb)) {
cd82e61c 370 case HCI_COMMAND_PKT:
dcf4adbf 371 opcode = cpu_to_le16(HCI_MON_COMMAND_PKT);
cd82e61c
MH		 372 break;
373 case HCI_EVENT_PKT:
dcf4adbf 374 opcode = cpu_to_le16(HCI_MON_EVENT_PKT);
cd82e61c
MH		 375 break;
376 case HCI_ACLDATA_PKT:
377 if (bt_cb(skb)->incoming)
dcf4adbf 378 opcode = cpu_to_le16(HCI_MON_ACL_RX_PKT);
cd82e61c 379 else
dcf4adbf 380 opcode = cpu_to_le16(HCI_MON_ACL_TX_PKT);
cd82e61c
MH		 381 break;
382 case HCI_SCODATA_PKT:
383 if (bt_cb(skb)->incoming)
dcf4adbf 384 opcode = cpu_to_le16(HCI_MON_SCO_RX_PKT);
cd82e61c 385 else
dcf4adbf 386 opcode = cpu_to_le16(HCI_MON_SCO_TX_PKT);
cd82e61c 387 break;
f9a619db
LAD		 388 case HCI_ISODATA_PKT:
389 if (bt_cb(skb)->incoming)
390 opcode = cpu_to_le16(HCI_MON_ISO_RX_PKT);
391 else
392 opcode = cpu_to_le16(HCI_MON_ISO_TX_PKT);
393 break;
e875ff84
MH		 394 case HCI_DIAG_PKT:
395 opcode = cpu_to_le16(HCI_MON_VENDOR_DIAG);
396 break;
cd82e61c
MH		 397 default:
398 return;
399 }
400
2b531294
MH		 401 /* Create a private copy with headroom */
402 skb_copy = __pskb_copy_fclone(skb, HCI_MON_HDR_SIZE, GFP_ATOMIC, true);
403 if (!skb_copy)
404 return;
405
69ae5065
LAD		 406 hci_sock_copy_creds(skb->sk, skb_copy);
407
2b531294 408 /* Put header before the data */
d58ff351 409 hdr = skb_push(skb_copy, HCI_MON_HDR_SIZE);
2b531294
MH		 410 hdr->opcode = opcode;
411 hdr->index = cpu_to_le16(hdev->id);
412 hdr->len = cpu_to_le16(skb->len);
413
c08b1a1d
MH		 414 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb_copy,
415 HCI_SOCK_TRUSTED, NULL);
cd82e61c
MH		 416 kfree_skb(skb_copy);
417}
418
38ceaa00
MH		 419void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
420 void *data, u16 data_len, ktime_t tstamp,
421 int flag, struct sock *skip_sk)
422{
423 struct sock *sk;
424 __le16 index;
425
426 if (hdev)
427 index = cpu_to_le16(hdev->id);
428 else
429 index = cpu_to_le16(MGMT_INDEX_NONE);
430
431 read_lock(&hci_sk_list.lock);
432
433 sk_for_each(sk, &hci_sk_list.head) {
434 struct hci_mon_hdr *hdr;
435 struct sk_buff *skb;
436
437 if (hci_pi(sk)->channel != HCI_CHANNEL_CONTROL)
438 continue;
439
440 /* Ignore socket without the flag set */
441 if (!hci_sock_test_flag(sk, flag))
442 continue;
443
444 /* Skip the original socket */
445 if (sk == skip_sk)
446 continue;
447
448 skb = bt_skb_alloc(6 + data_len, GFP_ATOMIC);
449 if (!skb)
450 continue;
451
452 put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
453 put_unaligned_le16(event, skb_put(skb, 2));
454
455 if (data)
59ae1d12 456 skb_put_data(skb, data, data_len);
38ceaa00
MH		 457
458 skb->tstamp = tstamp;
459
d58ff351 460 hdr = skb_push(skb, HCI_MON_HDR_SIZE);
38ceaa00
MH		 461 hdr->opcode = cpu_to_le16(HCI_MON_CTRL_EVENT);
462 hdr->index = index;
463 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
464
a9ee77af
SAS		 465 __hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
466 HCI_SOCK_TRUSTED, NULL);
38ceaa00
MH		 467 kfree_skb(skb);
468 }
469
470 read_unlock(&hci_sk_list.lock);
471}
472
cd82e61c
MH		 473static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event)
474{
475 struct hci_mon_hdr *hdr;
476 struct hci_mon_new_index *ni;
6c566dd5 477 struct hci_mon_index_info *ii;
cd82e61c
MH		 478 struct sk_buff *skb;
479 __le16 opcode;
480
481 switch (event) {
482 case HCI_DEV_REG:
483 skb = bt_skb_alloc(HCI_MON_NEW_INDEX_SIZE, GFP_ATOMIC);
484 if (!skb)
485 return NULL;
486
4df864c1 487 ni = skb_put(skb, HCI_MON_NEW_INDEX_SIZE);
cd82e61c
MH		 488 ni->type = hdev->dev_type;
489 ni->bus = hdev->bus;
490 bacpy(&ni->bdaddr, &hdev->bdaddr);
cb3871b1
KC		 491 memcpy_and_pad(ni->name, sizeof(ni->name), hdev->name,
492 strnlen(hdev->name, sizeof(ni->name)), '\0');
cd82e61c 493
dcf4adbf 494 opcode = cpu_to_le16(HCI_MON_NEW_INDEX);
cd82e61c
MH		 495 break;
496
497 case HCI_DEV_UNREG:
498 skb = bt_skb_alloc(0, GFP_ATOMIC);
499 if (!skb)
500 return NULL;
501
dcf4adbf 502 opcode = cpu_to_le16(HCI_MON_DEL_INDEX);
cd82e61c
MH		 503 break;
504
e131d74a
MH		 505 case HCI_DEV_SETUP:
506 if (hdev->manufacturer == 0xffff)
507 return NULL;
19186c7b 508 fallthrough;
e131d74a 509
6c566dd5
MH		 510 case HCI_DEV_UP:
511 skb = bt_skb_alloc(HCI_MON_INDEX_INFO_SIZE, GFP_ATOMIC);
512 if (!skb)
513 return NULL;
514
4df864c1 515 ii = skb_put(skb, HCI_MON_INDEX_INFO_SIZE);
6c566dd5
MH		 516 bacpy(&ii->bdaddr, &hdev->bdaddr);
517 ii->manufacturer = cpu_to_le16(hdev->manufacturer);
518
519 opcode = cpu_to_le16(HCI_MON_INDEX_INFO);
520 break;
521
22db3cbc
MH		 522 case HCI_DEV_OPEN:
523 skb = bt_skb_alloc(0, GFP_ATOMIC);
524 if (!skb)
525 return NULL;
526
527 opcode = cpu_to_le16(HCI_MON_OPEN_INDEX);
528 break;
529
530 case HCI_DEV_CLOSE:
531 skb = bt_skb_alloc(0, GFP_ATOMIC);
532 if (!skb)
533 return NULL;
534
535 opcode = cpu_to_le16(HCI_MON_CLOSE_INDEX);
536 break;
537
cd82e61c
MH		 538 default:
539 return NULL;
540 }
541
542 __net_timestamp(skb);
543
d58ff351 544 hdr = skb_push(skb, HCI_MON_HDR_SIZE);
cd82e61c
MH		 545 hdr->opcode = opcode;
546 hdr->index = cpu_to_le16(hdev->id);
547 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
548
549 return skb;
550}
551
249fa169
MH		 552static struct sk_buff *create_monitor_ctrl_open(struct sock *sk)
553{
554 struct hci_mon_hdr *hdr;
555 struct sk_buff *skb;
d0bef1d2 556 u16 format;
249fa169
MH		 557 u8 ver[3];
558 u32 flags;
559
0ef2c42f
MH		 560 /* No message needed when cookie is not present */
561 if (!hci_pi(sk)->cookie)
562 return NULL;
563
d0bef1d2 564 switch (hci_pi(sk)->channel) {
f81f5b2d
MH		 565 case HCI_CHANNEL_RAW:
566 format = 0x0000;
567 ver[0] = BT_SUBSYS_VERSION;
568 put_unaligned_le16(BT_SUBSYS_REVISION, ver + 1);
569 break;
aa1638dd
MH		 570 case HCI_CHANNEL_USER:
571 format = 0x0001;
572 ver[0] = BT_SUBSYS_VERSION;
573 put_unaligned_le16(BT_SUBSYS_REVISION, ver + 1);
574 break;
d0bef1d2
MH		 575 case HCI_CHANNEL_CONTROL:
576 format = 0x0002;
577 mgmt_fill_version_info(ver);
578 break;
579 default:
580 /* No message for unsupported format */
581 return NULL;
582 }
583
69ae5065 584 skb = bt_skb_alloc(14 + TASK_COMM_LEN, GFP_ATOMIC);
249fa169
MH		 585 if (!skb)
586 return NULL;
587
69ae5065
LAD		 588 hci_sock_copy_creds(sk, skb);
589
249fa169
MH		 590 flags = hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) ? 0x1 : 0x0;
591
592 put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
593 put_unaligned_le16(format, skb_put(skb, 2));
59ae1d12 594 skb_put_data(skb, ver, sizeof(ver));
249fa169 595 put_unaligned_le32(flags, skb_put(skb, 4));
634fef61 596 skb_put_u8(skb, TASK_COMM_LEN);
59ae1d12 597 skb_put_data(skb, hci_pi(sk)->comm, TASK_COMM_LEN);
249fa169
MH		 598
599 __net_timestamp(skb);
600
d58ff351 601 hdr = skb_push(skb, HCI_MON_HDR_SIZE);
249fa169 602 hdr->opcode = cpu_to_le16(HCI_MON_CTRL_OPEN);
0ef2c42f
MH		 603 if (hci_pi(sk)->hdev)
604 hdr->index = cpu_to_le16(hci_pi(sk)->hdev->id);
605 else
606 hdr->index = cpu_to_le16(HCI_DEV_NONE);
249fa169
MH		 607 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
608
609 return skb;
610}
611
612static struct sk_buff *create_monitor_ctrl_close(struct sock *sk)
613{
614 struct hci_mon_hdr *hdr;
615 struct sk_buff *skb;
616
0ef2c42f
MH		 617 /* No message needed when cookie is not present */
618 if (!hci_pi(sk)->cookie)
619 return NULL;
620
d0bef1d2 621 switch (hci_pi(sk)->channel) {
f81f5b2d 622 case HCI_CHANNEL_RAW:
aa1638dd 623 case HCI_CHANNEL_USER:
d0bef1d2
MH		 624 case HCI_CHANNEL_CONTROL:
625 break;
626 default:
627 /* No message for unsupported format */
628 return NULL;
629 }
630
249fa169
MH		 631 skb = bt_skb_alloc(4, GFP_ATOMIC);
632 if (!skb)
633 return NULL;
634
69ae5065
LAD		 635 hci_sock_copy_creds(sk, skb);
636
249fa169
MH		 637 put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
638
639 __net_timestamp(skb);
640
d58ff351 641 hdr = skb_push(skb, HCI_MON_HDR_SIZE);
249fa169 642 hdr->opcode = cpu_to_le16(HCI_MON_CTRL_CLOSE);
0ef2c42f
MH		 643 if (hci_pi(sk)->hdev)
644 hdr->index = cpu_to_le16(hci_pi(sk)->hdev->id);
645 else
646 hdr->index = cpu_to_le16(HCI_DEV_NONE);
249fa169
MH		 647 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
648
649 return skb;
650}
651
38ceaa00
MH		 652static struct sk_buff *create_monitor_ctrl_command(struct sock *sk, u16 index,
653 u16 opcode, u16 len,
654 const void *buf)
655{
656 struct hci_mon_hdr *hdr;
657 struct sk_buff *skb;
658
659 skb = bt_skb_alloc(6 + len, GFP_ATOMIC);
660 if (!skb)
661 return NULL;
662
69ae5065
LAD		 663 hci_sock_copy_creds(sk, skb);
664
38ceaa00
MH		 665 put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
666 put_unaligned_le16(opcode, skb_put(skb, 2));
667
668 if (buf)
59ae1d12 669 skb_put_data(skb, buf, len);
38ceaa00
MH		 670
671 __net_timestamp(skb);
672
d58ff351 673 hdr = skb_push(skb, HCI_MON_HDR_SIZE);
38ceaa00
MH		 674 hdr->opcode = cpu_to_le16(HCI_MON_CTRL_COMMAND);
675 hdr->index = cpu_to_le16(index);
676 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
677
678 return skb;
679}
680
787b306c
JB		 681static void __printf(2, 3)
682send_monitor_note(struct sock *sk, const char *fmt, ...)
dd31506d 683{
787b306c 684 size_t len;
dd31506d
MH		 685 struct hci_mon_hdr *hdr;
686 struct sk_buff *skb;
787b306c
JB		 687 va_list args;
688
689 va_start(args, fmt);
690 len = vsnprintf(NULL, 0, fmt, args);
691 va_end(args);
dd31506d
MH		 692
693 skb = bt_skb_alloc(len + 1, GFP_ATOMIC);
694 if (!skb)
695 return;
696
69ae5065
LAD		 697 hci_sock_copy_creds(sk, skb);
698
787b306c
JB		 699 va_start(args, fmt);
700 vsprintf(skb_put(skb, len), fmt, args);
4df864c1 701 *(u8 *)skb_put(skb, 1) = 0;
787b306c 702 va_end(args);
dd31506d
MH		 703
704 __net_timestamp(skb);
705
706 hdr = (void *)skb_push(skb, HCI_MON_HDR_SIZE);
707 hdr->opcode = cpu_to_le16(HCI_MON_SYSTEM_NOTE);
708 hdr->index = cpu_to_le16(HCI_DEV_NONE);
709 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
710
711 if (sock_queue_rcv_skb(sk, skb))
712 kfree_skb(skb);
713}
714
cd82e61c
MH		 715static void send_monitor_replay(struct sock *sk)
716{
717 struct hci_dev *hdev;
718
719 read_lock(&hci_dev_list_lock);
720
721 list_for_each_entry(hdev, &hci_dev_list, list) {
722 struct sk_buff *skb;
723
724 skb = create_monitor_event(hdev, HCI_DEV_REG);
725 if (!skb)
726 continue;
727
728 if (sock_queue_rcv_skb(sk, skb))
729 kfree_skb(skb);
22db3cbc
MH		 730
731 if (!test_bit(HCI_RUNNING, &hdev->flags))
732 continue;
733
734 skb = create_monitor_event(hdev, HCI_DEV_OPEN);
735 if (!skb)
736 continue;
737
738 if (sock_queue_rcv_skb(sk, skb))
739 kfree_skb(skb);
6c566dd5 740
e131d74a
MH		 741 if (test_bit(HCI_UP, &hdev->flags))
742 skb = create_monitor_event(hdev, HCI_DEV_UP);
743 else if (hci_dev_test_flag(hdev, HCI_SETUP))
744 skb = create_monitor_event(hdev, HCI_DEV_SETUP);
745 else
746 skb = NULL;
6c566dd5 747
e131d74a
MH		 748 if (skb) {
749 if (sock_queue_rcv_skb(sk, skb))
750 kfree_skb(skb);
751 }
cd82e61c
MH		 752 }
753
754 read_unlock(&hci_dev_list_lock);
755}
756
249fa169
MH		 757static void send_monitor_control_replay(struct sock *mon_sk)
758{
759 struct sock *sk;
760
761 read_lock(&hci_sk_list.lock);
762
763 sk_for_each(sk, &hci_sk_list.head) {
764 struct sk_buff *skb;
765
249fa169
MH		 766 skb = create_monitor_ctrl_open(sk);
767 if (!skb)
768 continue;
769
770 if (sock_queue_rcv_skb(mon_sk, skb))
771 kfree_skb(skb);
772 }
773
774 read_unlock(&hci_sk_list.lock);
775}
776
040030ef
MH		 777/* Generate internal stack event */
778static void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data)
779{
780 struct hci_event_hdr *hdr;
781 struct hci_ev_stack_internal *ev;
782 struct sk_buff *skb;
783
784 skb = bt_skb_alloc(HCI_EVENT_HDR_SIZE + sizeof(*ev) + dlen, GFP_ATOMIC);
785 if (!skb)
786 return;
787
4df864c1 788 hdr = skb_put(skb, HCI_EVENT_HDR_SIZE);
040030ef
MH		 789 hdr->evt = HCI_EV_STACK_INTERNAL;
790 hdr->plen = sizeof(*ev) + dlen;
791
4df864c1 792 ev = skb_put(skb, sizeof(*ev) + dlen);
040030ef
MH		 793 ev->type = type;
794 memcpy(ev->data, data, dlen);
795
796 bt_cb(skb)->incoming = 1;
797 __net_timestamp(skb);
798
d79f34e3 799 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
040030ef
MH		 800 hci_send_to_sock(hdev, skb);
801 kfree_skb(skb);
802}
803
804void hci_sock_dev_event(struct hci_dev *hdev, int event)
805{
040030ef
MH		 806 BT_DBG("hdev %s event %d", hdev->name, event);
807
cd82e61c
MH		 808 if (atomic_read(&monitor_promisc)) {
809 struct sk_buff *skb;
810
ed1b28a4 811 /* Send event to monitor */
cd82e61c
MH		 812 skb = create_monitor_event(hdev, event);
813 if (skb) {
c08b1a1d
MH		 814 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
815 HCI_SOCK_TRUSTED, NULL);
cd82e61c
MH		 816 kfree_skb(skb);
817 }
818 }
819
ed1b28a4
MH		 820 if (event <= HCI_DEV_DOWN) {
821 struct hci_ev_si_device ev;
822
823 /* Send event to sockets */
824 ev.event = event;
825 ev.dev_id = hdev->id;
826 hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev);
827 }
040030ef
MH		 828
829 if (event == HCI_DEV_UNREG) {
830 struct sock *sk;
040030ef 831
e0448092 832 /* Wake up sockets using this dead device */
040030ef 833 read_lock(&hci_sk_list.lock);
b67bfe0d 834 sk_for_each(sk, &hci_sk_list.head) {
040030ef 835 if (hci_pi(sk)->hdev == hdev) {
040030ef 836 sk->sk_err = EPIPE;
040030ef 837 sk->sk_state_change(sk);
040030ef 838 }
040030ef
MH		 839 }
840 read_unlock(&hci_sk_list.lock);
841 }
842}
843
801c1e8d
JH		 844static struct hci_mgmt_chan *__hci_mgmt_chan_find(unsigned short channel)
845{
846 struct hci_mgmt_chan *c;
847
848 list_for_each_entry(c, &mgmt_chan_list, list) {
849 if (c->channel == channel)
850 return c;
851 }
852
853 return NULL;
854}
855
856static struct hci_mgmt_chan *hci_mgmt_chan_find(unsigned short channel)
857{
858 struct hci_mgmt_chan *c;
859
860 mutex_lock(&mgmt_chan_list_lock);
861 c = __hci_mgmt_chan_find(channel);
862 mutex_unlock(&mgmt_chan_list_lock);
863
864 return c;
865}
866
867int hci_mgmt_chan_register(struct hci_mgmt_chan *c)
868{
869 if (c->channel < HCI_CHANNEL_CONTROL)
870 return -EINVAL;
871
872 mutex_lock(&mgmt_chan_list_lock);
873 if (__hci_mgmt_chan_find(c->channel)) {
874 mutex_unlock(&mgmt_chan_list_lock);
875 return -EALREADY;
876 }
877
878 list_add_tail(&c->list, &mgmt_chan_list);
879
880 mutex_unlock(&mgmt_chan_list_lock);
881
882 return 0;
883}
884EXPORT_SYMBOL(hci_mgmt_chan_register);
885
886void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c)
887{
888 mutex_lock(&mgmt_chan_list_lock);
889 list_del(&c->list);
890 mutex_unlock(&mgmt_chan_list_lock);
891}
892EXPORT_SYMBOL(hci_mgmt_chan_unregister);
893
1da177e4
LT		 894static int hci_sock_release(struct socket *sock)
895{
896 struct sock *sk = sock->sk;
7b005bd3 897 struct hci_dev *hdev;
249fa169 898 struct sk_buff *skb;
1da177e4
LT		 899
900 BT_DBG("sock %p sk %p", sock, sk);
901
902 if (!sk)
903 return 0;
904
11eb85ec
DC		 905 lock_sock(sk);
906
70ecce91
MH		 907 switch (hci_pi(sk)->channel) {
908 case HCI_CHANNEL_MONITOR:
cd82e61c 909 atomic_dec(&monitor_promisc);
70ecce91 910 break;
f81f5b2d 911 case HCI_CHANNEL_RAW:
aa1638dd 912 case HCI_CHANNEL_USER:
70ecce91 913 case HCI_CHANNEL_CONTROL:
249fa169
MH		 914 /* Send event to monitor */
915 skb = create_monitor_ctrl_close(sk);
916 if (skb) {
917 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
918 HCI_SOCK_TRUSTED, NULL);
919 kfree_skb(skb);
920 }
921
df1cb87a 922 hci_sock_free_cookie(sk);
70ecce91
MH		 923 break;
924 }
cd82e61c 925
1da177e4
LT		 926 bt_sock_unlink(&hci_sk_list, sk);
927
e20a2e9c 928 hdev = hci_pi(sk)->hdev;
1da177e4 929 if (hdev) {
0acef50b
APS		 930 if (hci_pi(sk)->channel == HCI_CHANNEL_USER &&
931 !hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
9332ef9d 932 /* When releasing a user channel exclusive access,
6b3cc1db
SF		 933 * call hci_dev_do_close directly instead of calling
934 * hci_dev_close to ensure the exclusive access will
935 * be released and the controller brought back down.
936 *
937 * The checking of HCI_AUTO_OFF is not needed in this
938 * case since it will have been cleared already when
939 * opening the user channel.
0acef50b
APS		 940 *
941 * Make sure to also check that we haven't already
942 * unregistered since all the cleanup will have already
943 * been complete and hdev will get released when we put
944 * below.
6b3cc1db
SF		 945 */
946 hci_dev_do_close(hdev);
9380f9ea
LP		 947 hci_dev_clear_flag(hdev, HCI_USER_CHANNEL);
948 mgmt_index_added(hdev);
23500189
MH		 949 }
950
1da177e4
LT		 951 atomic_dec(&hdev->promisc);
952 hci_dev_put(hdev);
953 }
954
955 sock_orphan(sk);
11eb85ec 956 release_sock(sk);
1da177e4
LT		 957 sock_put(sk);
958 return 0;
959}
960
3d4f9c00 961static int hci_sock_reject_list_add(struct hci_dev *hdev, void __user *arg)
f0358568
JH		 962{
963 bdaddr_t bdaddr;
5e762444 964 int err;
f0358568
JH		 965
966 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
967 return -EFAULT;
968
09fd0de5 969 hci_dev_lock(hdev);
5e762444 970
3d4f9c00 971 err = hci_bdaddr_list_add(&hdev->reject_list, &bdaddr, BDADDR_BREDR);
5e762444 972
09fd0de5 973 hci_dev_unlock(hdev);
5e762444
AJ		 974
975 return err;
f0358568
JH		 976}
977
3d4f9c00 978static int hci_sock_reject_list_del(struct hci_dev *hdev, void __user *arg)
f0358568
JH		 979{
980 bdaddr_t bdaddr;
5e762444 981 int err;
f0358568
JH		 982
983 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
984 return -EFAULT;
985
09fd0de5 986 hci_dev_lock(hdev);
5e762444 987
3d4f9c00 988 err = hci_bdaddr_list_del(&hdev->reject_list, &bdaddr, BDADDR_BREDR);
5e762444 989
09fd0de5 990 hci_dev_unlock(hdev);
5e762444
AJ		 991
992 return err;
f0358568
JH		 993}
994
8e87d142 995/* Ioctls that require bound socket */
6039aa73
GP		 996static int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd,
997 unsigned long arg)
1da177e4 998{
e0448092 999 struct hci_dev *hdev = hci_hdev_from_sock(sk);
1da177e4 1000
e0448092
TH		 1001 if (IS_ERR(hdev))
1002 return PTR_ERR(hdev);
1da177e4 1003
d7a5a11d 1004 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
0736cfa8
MH		 1005 return -EBUSY;
1006
d7a5a11d 1007 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
fee746b0
MH		 1008 return -EOPNOTSUPP;
1009
ca8bee5d 1010 if (hdev->dev_type != HCI_PRIMARY)
5b69bef5
MH		 1011 return -EOPNOTSUPP;
1012
1da177e4
LT		 1013 switch (cmd) {
1014 case HCISETRAW:
1015 if (!capable(CAP_NET_ADMIN))
bf5b30b8 1016 return -EPERM;
db596681 1017 return -EOPNOTSUPP;
1da177e4 1018
1da177e4 1019 case HCIGETCONNINFO:
8528d3f7 1020 return hci_get_conn_info(hdev, (void __user *)arg);
40be492f
MH		 1021
1022 case HCIGETAUTHINFO:
8528d3f7 1023 return hci_get_auth_info(hdev, (void __user *)arg);
1da177e4 1024
f0358568
JH		 1025 case HCIBLOCKADDR:
1026 if (!capable(CAP_NET_ADMIN))
bf5b30b8 1027 return -EPERM;
3d4f9c00 1028 return hci_sock_reject_list_add(hdev, (void __user *)arg);
f0358568
JH		 1029
1030 case HCIUNBLOCKADDR:
1031 if (!capable(CAP_NET_ADMIN))
bf5b30b8 1032 return -EPERM;
3d4f9c00 1033 return hci_sock_reject_list_del(hdev, (void __user *)arg);
1da177e4 1034 }
0736cfa8 1035
324d36ed 1036 return -ENOIOCTLCMD;
1da177e4
LT		 1037}
1038
8fc9ced3
GP		 1039static int hci_sock_ioctl(struct socket *sock, unsigned int cmd,
1040 unsigned long arg)
1da177e4 1041{
8528d3f7 1042 void __user *argp = (void __user *)arg;
0736cfa8 1043 struct sock *sk = sock->sk;
1da177e4
LT		 1044 int err;
1045
1046 BT_DBG("cmd %x arg %lx", cmd, arg);
1047
000c2fa2
RL		 1048 /* Make sure the cmd is valid before doing anything */
1049 switch (cmd) {
1050 case HCIGETDEVLIST:
1051 case HCIGETDEVINFO:
1052 case HCIGETCONNLIST:
1053 case HCIDEVUP:
1054 case HCIDEVDOWN:
1055 case HCIDEVRESET:
1056 case HCIDEVRESTAT:
1057 case HCISETSCAN:
1058 case HCISETAUTH:
1059 case HCISETENCRYPT:
1060 case HCISETPTYPE:
1061 case HCISETLINKPOL:
1062 case HCISETLINKMODE:
1063 case HCISETACLMTU:
1064 case HCISETSCOMTU:
1065 case HCIINQUIRY:
1066 case HCISETRAW:
1067 case HCIGETCONNINFO:
1068 case HCIGETAUTHINFO:
1069 case HCIBLOCKADDR:
1070 case HCIUNBLOCKADDR:
1071 break;
1072 default:
1073 return -ENOIOCTLCMD;
1074 }
1075
c1c4f956
MH		 1076 lock_sock(sk);
1077
1078 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
1079 err = -EBADFD;
1080 goto done;
1081 }
1082
f81f5b2d
MH		 1083 /* When calling an ioctl on an unbound raw socket, then ensure
1084 * that the monitor gets informed. Ensure that the resulting event
1085 * is only send once by checking if the cookie exists or not. The
1086 * socket cookie will be only ever generated once for the lifetime
1087 * of a given socket.
1088 */
1089 if (hci_sock_gen_cookie(sk)) {
1090 struct sk_buff *skb;
1091
25c150ac
RL		 1092 /* Perform careful checks before setting the HCI_SOCK_TRUSTED
1093 * flag. Make sure that not only the current task but also
1094 * the socket opener has the required capability, since
1095 * privileged programs can be tricked into making ioctl calls
1096 * on HCI sockets, and the socket should not be marked as
1097 * trusted simply because the ioctl caller is privileged.
1098 */
1099 if (sk_capable(sk, CAP_NET_ADMIN))
f81f5b2d
MH		 1100 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1101
1102 /* Send event to monitor */
1103 skb = create_monitor_ctrl_open(sk);
1104 if (skb) {
1105 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1106 HCI_SOCK_TRUSTED, NULL);
1107 kfree_skb(skb);
1108 }
1109 }
1110
c1c4f956
MH		 1111 release_sock(sk);
1112
1da177e4
LT		 1113 switch (cmd) {
1114 case HCIGETDEVLIST:
1115 return hci_get_dev_list(argp);
1116
1117 case HCIGETDEVINFO:
1118 return hci_get_dev_info(argp);
1119
1120 case HCIGETCONNLIST:
1121 return hci_get_conn_list(argp);
1122
1123 case HCIDEVUP:
1124 if (!capable(CAP_NET_ADMIN))
bf5b30b8 1125 return -EPERM;
1da177e4
LT		 1126 return hci_dev_open(arg);
1127
1128 case HCIDEVDOWN:
1129 if (!capable(CAP_NET_ADMIN))
bf5b30b8 1130 return -EPERM;
1da177e4
LT		 1131 return hci_dev_close(arg);
1132
1133 case HCIDEVRESET:
1134 if (!capable(CAP_NET_ADMIN))
bf5b30b8 1135 return -EPERM;
1da177e4
LT		 1136 return hci_dev_reset(arg);
1137
1138 case HCIDEVRESTAT:
1139 if (!capable(CAP_NET_ADMIN))
bf5b30b8 1140 return -EPERM;
1da177e4
LT		 1141 return hci_dev_reset_stat(arg);
1142
1143 case HCISETSCAN:
1144 case HCISETAUTH:
1145 case HCISETENCRYPT:
1146 case HCISETPTYPE:
1147 case HCISETLINKPOL:
1148 case HCISETLINKMODE:
1149 case HCISETACLMTU:
1150 case HCISETSCOMTU:
1151 if (!capable(CAP_NET_ADMIN))
bf5b30b8 1152 return -EPERM;
1da177e4
LT		 1153 return hci_dev_cmd(cmd, argp);
1154
1155 case HCIINQUIRY:
1156 return hci_inquiry(argp);
1da177e4 1157 }
c1c4f956
MH		 1158
1159 lock_sock(sk);
1160
1161 err = hci_sock_bound_ioctl(sk, cmd, arg);
1162
1163done:
1164 release_sock(sk);
1165 return err;
1da177e4
LT		 1166}
1167
7a6038b3
AB		 1168#ifdef CONFIG_COMPAT
1169static int hci_sock_compat_ioctl(struct socket *sock, unsigned int cmd,
1170 unsigned long arg)
1171{
1172 switch (cmd) {
1173 case HCIDEVUP:
1174 case HCIDEVDOWN:
1175 case HCIDEVRESET:
1176 case HCIDEVRESTAT:
1177 return hci_sock_ioctl(sock, cmd, arg);
1178 }
1179
1180 return hci_sock_ioctl(sock, cmd, (unsigned long)compat_ptr(arg));
1181}
1182#endif
1183
8fc9ced3
GP		 1184static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
1185 int addr_len)
1da177e4 1186{
0381101f 1187 struct sockaddr_hci haddr;
1da177e4
LT		 1188 struct sock *sk = sock->sk;
1189 struct hci_dev *hdev = NULL;
f4cdbb3f 1190 struct sk_buff *skb;
0381101f 1191 int len, err = 0;
1da177e4
LT		 1192
1193 BT_DBG("sock %p sk %p", sock, sk);
1194
0381101f
JH		 1195 if (!addr)
1196 return -EINVAL;
1197
1198 memset(&haddr, 0, sizeof(haddr));
1199 len = min_t(unsigned int, sizeof(haddr), addr_len);
1200 memcpy(&haddr, addr, len);
1201
1202 if (haddr.hci_family != AF_BLUETOOTH)
1203 return -EINVAL;
1204
1da177e4
LT		 1205 lock_sock(sk);
1206
e0448092
TH		 1207 /* Allow detaching from dead device and attaching to alive device, if
1208 * the caller wants to re-bind (instead of close) this socket in
1209 * response to hci_sock_dev_event(HCI_DEV_UNREG) notification.
1210 */
1211 hdev = hci_pi(sk)->hdev;
1212 if (hdev && hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1213 hci_pi(sk)->hdev = NULL;
1214 sk->sk_state = BT_OPEN;
1215 hci_dev_put(hdev);
1216 }
1217 hdev = NULL;
1218
7cc2ade2 1219 if (sk->sk_state == BT_BOUND) {
1da177e4
LT		 1220 err = -EALREADY;
1221 goto done;
1222 }
1223
7cc2ade2
MH		 1224 switch (haddr.hci_channel) {
1225 case HCI_CHANNEL_RAW:
1226 if (hci_pi(sk)->hdev) {
1227 err = -EALREADY;
1da177e4
LT		 1228 goto done;
1229 }
1230
7cc2ade2
MH		 1231 if (haddr.hci_dev != HCI_DEV_NONE) {
1232 hdev = hci_dev_get(haddr.hci_dev);
1233 if (!hdev) {
1234 err = -ENODEV;
1235 goto done;
1236 }
1237
1238 atomic_inc(&hdev->promisc);
1239 }
1240
5a6d2cf5 1241 hci_pi(sk)->channel = haddr.hci_channel;
f81f5b2d 1242
f4cdbb3f
MH		 1243 if (!hci_sock_gen_cookie(sk)) {
1244 /* In the case when a cookie has already been assigned,
1245 * then there has been already an ioctl issued against
91641b79 1246 * an unbound socket and with that triggered an open
f4cdbb3f
MH		 1247 * notification. Send a close notification first to
1248 * allow the state transition to bounded.
1249 */
1250 skb = create_monitor_ctrl_close(sk);
f81f5b2d
MH		 1251 if (skb) {
1252 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1253 HCI_SOCK_TRUSTED, NULL);
1254 kfree_skb(skb);
1255 }
1256 }
f4cdbb3f
MH		 1257
1258 if (capable(CAP_NET_ADMIN))
1259 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1260
1261 hci_pi(sk)->hdev = hdev;
1262
1263 /* Send event to monitor */
1264 skb = create_monitor_ctrl_open(sk);
1265 if (skb) {
1266 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1267 HCI_SOCK_TRUSTED, NULL);
1268 kfree_skb(skb);
1269 }
7cc2ade2
MH		 1270 break;
1271
23500189
MH		 1272 case HCI_CHANNEL_USER:
1273 if (hci_pi(sk)->hdev) {
1274 err = -EALREADY;
1275 goto done;
1276 }
1277
1278 if (haddr.hci_dev == HCI_DEV_NONE) {
1279 err = -EINVAL;
1280 goto done;
1281 }
1282
10a8b86f 1283 if (!capable(CAP_NET_ADMIN)) {
23500189
MH		 1284 err = -EPERM;
1285 goto done;
1286 }
1287
1288 hdev = hci_dev_get(haddr.hci_dev);
1289 if (!hdev) {
1290 err = -ENODEV;
1291 goto done;
1292 }
1293
781f899f 1294 if (test_bit(HCI_INIT, &hdev->flags) ||
d7a5a11d 1295 hci_dev_test_flag(hdev, HCI_SETUP) ||
781f899f
MH		 1296 hci_dev_test_flag(hdev, HCI_CONFIG) ||
1297 (!hci_dev_test_flag(hdev, HCI_AUTO_OFF) &&
1298 test_bit(HCI_UP, &hdev->flags))) {
23500189
MH		 1299 err = -EBUSY;
1300 hci_dev_put(hdev);
1301 goto done;
1302 }
1303
238be788 1304 if (hci_dev_test_and_set_flag(hdev, HCI_USER_CHANNEL)) {
23500189
MH		 1305 err = -EUSERS;
1306 hci_dev_put(hdev);
1307 goto done;
1308 }
1309
0602a8ad 1310 mgmt_index_removed(hdev);
23500189
MH		 1311
1312 err = hci_dev_open(hdev->id);
1313 if (err) {
781f899f
MH		 1314 if (err == -EALREADY) {
1315 /* In case the transport is already up and
1316 * running, clear the error here.
1317 *
9332ef9d 1318 * This can happen when opening a user
781f899f
MH		 1319 * channel and HCI_AUTO_OFF grace period
1320 * is still active.
1321 */
1322 err = 0;
1323 } else {
1324 hci_dev_clear_flag(hdev, HCI_USER_CHANNEL);
1325 mgmt_index_added(hdev);
1326 hci_dev_put(hdev);
1327 goto done;
1328 }
23500189
MH		 1329 }
1330
5a6d2cf5 1331 hci_pi(sk)->channel = haddr.hci_channel;
aa1638dd
MH		 1332
1333 if (!hci_sock_gen_cookie(sk)) {
1334 /* In the case when a cookie has already been assigned,
1335 * this socket will transition from a raw socket into
9332ef9d 1336 * a user channel socket. For a clean transition, send
aa1638dd
MH		 1337 * the close notification first.
1338 */
1339 skb = create_monitor_ctrl_close(sk);
1340 if (skb) {
1341 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1342 HCI_SOCK_TRUSTED, NULL);
1343 kfree_skb(skb);
1344 }
1345 }
1346
1347 /* The user channel is restricted to CAP_NET_ADMIN
1348 * capabilities and with that implicitly trusted.
1349 */
1350 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1351
23500189 1352 hci_pi(sk)->hdev = hdev;
5a6d2cf5 1353
aa1638dd
MH		 1354 /* Send event to monitor */
1355 skb = create_monitor_ctrl_open(sk);
1356 if (skb) {
1357 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1358 HCI_SOCK_TRUSTED, NULL);
1359 kfree_skb(skb);
1360 }
1361
5a6d2cf5 1362 atomic_inc(&hdev->promisc);
23500189
MH		 1363 break;
1364
cd82e61c
MH		 1365 case HCI_CHANNEL_MONITOR:
1366 if (haddr.hci_dev != HCI_DEV_NONE) {
1367 err = -EINVAL;
1368 goto done;
1369 }
1370
1371 if (!capable(CAP_NET_RAW)) {
1372 err = -EPERM;
1373 goto done;
1374 }
1375
5a6d2cf5
MH		 1376 hci_pi(sk)->channel = haddr.hci_channel;
1377
50ebc055
MH		 1378 /* The monitor interface is restricted to CAP_NET_RAW
1379 * capabilities and with that implicitly trusted.
1380 */
1381 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1382
787b306c
JB		 1383 send_monitor_note(sk, "Linux version %s (%s)",
1384 init_utsname()->release,
1385 init_utsname()->machine);
9e8305b3
MH		 1386 send_monitor_note(sk, "Bluetooth subsystem version %u.%u",
1387 BT_SUBSYS_VERSION, BT_SUBSYS_REVISION);
cd82e61c 1388 send_monitor_replay(sk);
249fa169 1389 send_monitor_control_replay(sk);
cd82e61c
MH		 1390
1391 atomic_inc(&monitor_promisc);
1392 break;
1393
ac714949
MH		 1394 case HCI_CHANNEL_LOGGING:
1395 if (haddr.hci_dev != HCI_DEV_NONE) {
1396 err = -EINVAL;
1397 goto done;
1398 }
1399
1400 if (!capable(CAP_NET_ADMIN)) {
1401 err = -EPERM;
1402 goto done;
1403 }
5a6d2cf5
MH		 1404
1405 hci_pi(sk)->channel = haddr.hci_channel;
ac714949
MH		 1406 break;
1407
7cc2ade2 1408 default:
801c1e8d
JH		 1409 if (!hci_mgmt_chan_find(haddr.hci_channel)) {
1410 err = -EINVAL;
1411 goto done;
1412 }
1413
1414 if (haddr.hci_dev != HCI_DEV_NONE) {
1415 err = -EINVAL;
1416 goto done;
1417 }
1418
1195fbb8
MH		 1419 /* Users with CAP_NET_ADMIN capabilities are allowed
1420 * access to all management commands and events. For
1421 * untrusted users the interface is restricted and
1422 * also only untrusted events are sent.
50ebc055 1423 */
1195fbb8
MH		 1424 if (capable(CAP_NET_ADMIN))
1425 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
50ebc055 1426
5a6d2cf5
MH		 1427 hci_pi(sk)->channel = haddr.hci_channel;
1428
f9207338
MH		 1429 /* At the moment the index and unconfigured index events
1430 * are enabled unconditionally. Setting them on each
1431 * socket when binding keeps this functionality. They
1432 * however might be cleared later and then sending of these
1433 * events will be disabled, but that is then intentional.
f6b7712e
MH		 1434 *
1435 * This also enables generic events that are safe to be
1436 * received by untrusted users. Example for such events
1437 * are changes to settings, class of device, name etc.
f9207338 1438 */
5a6d2cf5 1439 if (hci_pi(sk)->channel == HCI_CHANNEL_CONTROL) {
f4cdbb3f
MH		 1440 if (!hci_sock_gen_cookie(sk)) {
1441 /* In the case when a cookie has already been
91641b79 1442 * assigned, this socket will transition from
f4cdbb3f 1443 * a raw socket into a control socket. To
91641b79 1444 * allow for a clean transition, send the
f4cdbb3f
MH		 1445 * close notification first.
1446 */
1447 skb = create_monitor_ctrl_close(sk);
1448 if (skb) {
1449 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1450 HCI_SOCK_TRUSTED, NULL);
1451 kfree_skb(skb);
1452 }
1453 }
70ecce91 1454
249fa169
MH		 1455 /* Send event to monitor */
1456 skb = create_monitor_ctrl_open(sk);
1457 if (skb) {
1458 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1459 HCI_SOCK_TRUSTED, NULL);
1460 kfree_skb(skb);
1461 }
1462
f9207338
MH		 1463 hci_sock_set_flag(sk, HCI_MGMT_INDEX_EVENTS);
1464 hci_sock_set_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS);
5504c3a3
MH		 1465 hci_sock_set_flag(sk, HCI_MGMT_OPTION_EVENTS);
1466 hci_sock_set_flag(sk, HCI_MGMT_SETTING_EVENTS);
1467 hci_sock_set_flag(sk, HCI_MGMT_DEV_CLASS_EVENTS);
1468 hci_sock_set_flag(sk, HCI_MGMT_LOCAL_NAME_EVENTS);
f9207338 1469 }
801c1e8d 1470 break;
1da177e4
LT		 1471 }
1472
09572fca
LAD		 1473 /* Default MTU to HCI_MAX_FRAME_SIZE if not set */
1474 if (!hci_pi(sk)->mtu)
1475 hci_pi(sk)->mtu = HCI_MAX_FRAME_SIZE;
1476
1da177e4
LT		 1477 sk->sk_state = BT_BOUND;
1478
1479done:
1480 release_sock(sk);
1481 return err;
1482}
1483
8fc9ced3 1484static int hci_sock_getname(struct socket *sock, struct sockaddr *addr,
9b2c45d4 1485 int peer)
1da177e4 1486{
8528d3f7 1487 struct sockaddr_hci *haddr = (struct sockaddr_hci *)addr;
1da177e4 1488 struct sock *sk = sock->sk;
9d4b68b2
MH		 1489 struct hci_dev *hdev;
1490 int err = 0;
1da177e4
LT		 1491
1492 BT_DBG("sock %p sk %p", sock, sk);
1493
06f43cbc
MH		 1494 if (peer)
1495 return -EOPNOTSUPP;
1496
1da177e4
LT		 1497 lock_sock(sk);
1498
e0448092
TH		 1499 hdev = hci_hdev_from_sock(sk);
1500 if (IS_ERR(hdev)) {
1501 err = PTR_ERR(hdev);
9d4b68b2
MH		 1502 goto done;
1503 }
1504
1da177e4 1505 haddr->hci_family = AF_BLUETOOTH;
7b005bd3 1506 haddr->hci_dev = hdev->id;
9d4b68b2 1507 haddr->hci_channel= hci_pi(sk)->channel;
9b2c45d4 1508 err = sizeof(*haddr);
1da177e4 1509
9d4b68b2 1510done:
1da177e4 1511 release_sock(sk);
9d4b68b2 1512 return err;
1da177e4
LT		 1513}
1514
6039aa73
GP		 1515static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg,
1516 struct sk_buff *skb)
1da177e4 1517{
32929e1f 1518 __u8 mask = hci_pi(sk)->cmsg_mask;
1da177e4 1519
0d48d939
MH		 1520 if (mask & HCI_CMSG_DIR) {
1521 int incoming = bt_cb(skb)->incoming;
8fc9ced3
GP		 1522 put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming),
1523 &incoming);
0d48d939 1524 }
1da177e4 1525
a61bbcf2 1526 if (mask & HCI_CMSG_TSTAMP) {
f6e623a6 1527#ifdef CONFIG_COMPAT
13c6ee2a 1528 struct old_timeval32 ctv;
f6e623a6 1529#endif
13c6ee2a 1530 struct __kernel_old_timeval tv;
767c5eb5
MH		 1531 void *data;
1532 int len;
a61bbcf2
PM		 1533
1534 skb_get_timestamp(skb, &tv);
767c5eb5 1535
1da97f83
DM		 1536 data = &tv;
1537 len = sizeof(tv);
1538#ifdef CONFIG_COMPAT
da88cea1
L		 1539 if (!COMPAT_USE_64BIT_TIME &&
1540 (msg->msg_flags & MSG_CMSG_COMPAT)) {
767c5eb5
MH		 1541 ctv.tv_sec = tv.tv_sec;
1542 ctv.tv_usec = tv.tv_usec;
1543 data = &ctv;
1544 len = sizeof(ctv);
767c5eb5 1545 }
1da97f83 1546#endif
767c5eb5
MH		 1547
1548 put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data);
a61bbcf2 1549 }
1da177e4 1550}
8e87d142 1551
8528d3f7
MH		 1552static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg,
1553 size_t len, int flags)
1da177e4 1554{
69ae5065 1555 struct scm_cookie scm;
1da177e4
LT		 1556 struct sock *sk = sock->sk;
1557 struct sk_buff *skb;
1558 int copied, err;
83871f8c 1559 unsigned int skblen;
1da177e4
LT		 1560
1561 BT_DBG("sock %p, sk %p", sock, sk);
1562
d94a6104 1563 if (flags & MSG_OOB)
1da177e4
LT		 1564 return -EOPNOTSUPP;
1565
ac714949
MH		 1566 if (hci_pi(sk)->channel == HCI_CHANNEL_LOGGING)
1567 return -EOPNOTSUPP;
1568
1da177e4
LT		 1569 if (sk->sk_state == BT_CLOSED)
1570 return 0;
1571
f4b41f06 1572 skb = skb_recv_datagram(sk, flags, &err);
70f23020 1573 if (!skb)
1da177e4
LT		 1574 return err;
1575
83871f8c 1576 skblen = skb->len;
1da177e4
LT		 1577 copied = skb->len;
1578 if (len < copied) {
1579 msg->msg_flags |= MSG_TRUNC;
1580 copied = len;
1581 }
1582
badff6d0 1583 skb_reset_transport_header(skb);
51f3d02b 1584 err = skb_copy_datagram_msg(skb, 0, msg, copied);
1da177e4 1585
3a208627
MH		 1586 switch (hci_pi(sk)->channel) {
1587 case HCI_CHANNEL_RAW:
1588 hci_sock_cmsg(sk, msg, skb);
1589 break;
23500189 1590 case HCI_CHANNEL_USER:
cd82e61c
MH		 1591 case HCI_CHANNEL_MONITOR:
1592 sock_recv_timestamp(msg, sk, skb);
1593 break;
801c1e8d
JH		 1594 default:
1595 if (hci_mgmt_chan_find(hci_pi(sk)->channel))
1596 sock_recv_timestamp(msg, sk, skb);
1597 break;
3a208627 1598 }
1da177e4 1599
69ae5065
LAD		 1600 memset(&scm, 0, sizeof(scm));
1601 scm.creds = bt_cb(skb)->creds;
1602
1da177e4
LT		 1603 skb_free_datagram(sk, skb);
1604
4f34228b 1605 if (flags & MSG_TRUNC)
83871f8c
DK		 1606 copied = skblen;
1607
69ae5065
LAD		 1608 scm_recv(sock, msg, &scm, flags);
1609
1da177e4
LT		 1610 return err ? : copied;
1611}
1612
64ba2eb3
LAD		 1613static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk,
1614 struct sk_buff *skb)
fa4335d7 1615{
fa4335d7
JH		 1616 u8 *cp;
1617 struct mgmt_hdr *hdr;
1618 u16 opcode, index, len;
1619 struct hci_dev *hdev = NULL;
1620 const struct hci_mgmt_handler *handler;
1621 bool var_len, no_hdev;
1622 int err;
1623
64ba2eb3 1624 BT_DBG("got %d bytes", skb->len);
fa4335d7 1625
64ba2eb3 1626 if (skb->len < sizeof(*hdr))
fa4335d7
JH		 1627 return -EINVAL;
1628
64ba2eb3 1629 hdr = (void *)skb->data;
fa4335d7
JH		 1630 opcode = __le16_to_cpu(hdr->opcode);
1631 index = __le16_to_cpu(hdr->index);
1632 len = __le16_to_cpu(hdr->len);
1633
64ba2eb3 1634 if (len != skb->len - sizeof(*hdr)) {
fa4335d7
JH		 1635 err = -EINVAL;
1636 goto done;
1637 }
1638
38ceaa00 1639 if (chan->channel == HCI_CHANNEL_CONTROL) {
64ba2eb3 1640 struct sk_buff *cmd;
38ceaa00
MH		 1641
1642 /* Send event to monitor */
64ba2eb3
LAD		 1643 cmd = create_monitor_ctrl_command(sk, index, opcode, len,
1644 skb->data + sizeof(*hdr));
1645 if (cmd) {
1646 hci_send_to_channel(HCI_CHANNEL_MONITOR, cmd,
38ceaa00 1647 HCI_SOCK_TRUSTED, NULL);
64ba2eb3 1648 kfree_skb(cmd);
38ceaa00
MH		 1649 }
1650 }
1651
fa4335d7
JH		 1652 if (opcode >= chan->handler_count ||
1653 chan->handlers[opcode].func == NULL) {
1654 BT_DBG("Unknown op %u", opcode);
1655 err = mgmt_cmd_status(sk, index, opcode,
1656 MGMT_STATUS_UNKNOWN_COMMAND);
1657 goto done;
1658 }
1659
1660 handler = &chan->handlers[opcode];
1661
1662 if (!hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) &&
1663 !(handler->flags & HCI_MGMT_UNTRUSTED)) {
1664 err = mgmt_cmd_status(sk, index, opcode,
1665 MGMT_STATUS_PERMISSION_DENIED);
1666 goto done;
1667 }
1668
1669 if (index != MGMT_INDEX_NONE) {
1670 hdev = hci_dev_get(index);
1671 if (!hdev) {
1672 err = mgmt_cmd_status(sk, index, opcode,
1673 MGMT_STATUS_INVALID_INDEX);
1674 goto done;
1675 }
1676
1677 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
1678 hci_dev_test_flag(hdev, HCI_CONFIG) ||
1679 hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1680 err = mgmt_cmd_status(sk, index, opcode,
1681 MGMT_STATUS_INVALID_INDEX);
1682 goto done;
1683 }
1684
1685 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1686 !(handler->flags & HCI_MGMT_UNCONFIGURED)) {
1687 err = mgmt_cmd_status(sk, index, opcode,
1688 MGMT_STATUS_INVALID_INDEX);
1689 goto done;
1690 }
1691 }
1692
d5cc6626
MH		 1693 if (!(handler->flags & HCI_MGMT_HDEV_OPTIONAL)) {
1694 no_hdev = (handler->flags & HCI_MGMT_NO_HDEV);
1695 if (no_hdev != !hdev) {
1696 err = mgmt_cmd_status(sk, index, opcode,
1697 MGMT_STATUS_INVALID_INDEX);
1698 goto done;
1699 }
fa4335d7
JH		 1700 }
1701
1702 var_len = (handler->flags & HCI_MGMT_VAR_LEN);
1703 if ((var_len && len < handler->data_len) ||
1704 (!var_len && len != handler->data_len)) {
1705 err = mgmt_cmd_status(sk, index, opcode,
1706 MGMT_STATUS_INVALID_PARAMS);
1707 goto done;
1708 }
1709
1710 if (hdev && chan->hdev_init)
1711 chan->hdev_init(sk, hdev);
1712
64ba2eb3 1713 cp = skb->data + sizeof(*hdr);
fa4335d7
JH		 1714
1715 err = handler->func(sk, hdev, cp, len);
1716 if (err < 0)
1717 goto done;
1718
64ba2eb3 1719 err = skb->len;
fa4335d7
JH		 1720
1721done:
1722 if (hdev)
1723 hci_dev_put(hdev);
1724
fa4335d7
JH		 1725 return err;
1726}
1727
64ba2eb3
LAD		 1728static int hci_logging_frame(struct sock *sk, struct sk_buff *skb,
1729 unsigned int flags)
ac714949
MH		 1730{
1731 struct hci_mon_hdr *hdr;
ac714949
MH		 1732 struct hci_dev *hdev;
1733 u16 index;
1734 int err;
1735
1736 /* The logging frame consists at minimum of the standard header,
1737 * the priority byte, the ident length byte and at least one string
1738 * terminator NUL byte. Anything shorter are invalid packets.
1739 */
64ba2eb3 1740 if (skb->len < sizeof(*hdr) + 3)
ac714949
MH		 1741 return -EINVAL;
1742
ac714949
MH		 1743 hdr = (void *)skb->data;
1744
64ba2eb3
LAD		 1745 if (__le16_to_cpu(hdr->len) != skb->len - sizeof(*hdr))
1746 return -EINVAL;
ac714949
MH		 1747
1748 if (__le16_to_cpu(hdr->opcode) == 0x0000) {
1749 __u8 priority = skb->data[sizeof(*hdr)];
1750 __u8 ident_len = skb->data[sizeof(*hdr) + 1];
1751
1752 /* Only the priorities 0-7 are valid and with that any other
1753 * value results in an invalid packet.
1754 *
1755 * The priority byte is followed by an ident length byte and
1756 * the NUL terminated ident string. Check that the ident
1757 * length is not overflowing the packet and also that the
1758 * ident string itself is NUL terminated. In case the ident
1759 * length is zero, the length value actually doubles as NUL
1760 * terminator identifier.
1761 *
1762 * The message follows the ident string (if present) and
1763 * must be NUL terminated. Otherwise it is not a valid packet.
1764 */
64ba2eb3
LAD		 1765 if (priority > 7 || skb->data[skb->len - 1] != 0x00 ||
1766 ident_len > skb->len - sizeof(*hdr) - 3 ||
1767 skb->data[sizeof(*hdr) + ident_len + 1] != 0x00)
1768 return -EINVAL;
ac714949 1769 } else {
64ba2eb3 1770 return -EINVAL;
ac714949
MH		 1771 }
1772
1773 index = __le16_to_cpu(hdr->index);
1774
1775 if (index != MGMT_INDEX_NONE) {
1776 hdev = hci_dev_get(index);
64ba2eb3
LAD		 1777 if (!hdev)
1778 return -ENODEV;
ac714949
MH		 1779 } else {
1780 hdev = NULL;
1781 }
1782
1783 hdr->opcode = cpu_to_le16(HCI_MON_USER_LOGGING);
1784
1785 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, HCI_SOCK_TRUSTED, NULL);
64ba2eb3 1786 err = skb->len;
ac714949
MH		 1787
1788 if (hdev)
1789 hci_dev_put(hdev);
1790
ac714949
MH		 1791 return err;
1792}
1793
1b784140
YX		 1794static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg,
1795 size_t len)
1da177e4
LT		 1796{
1797 struct sock *sk = sock->sk;
801c1e8d 1798 struct hci_mgmt_chan *chan;
1da177e4
LT		 1799 struct hci_dev *hdev;
1800 struct sk_buff *skb;
1801 int err;
0b59e272 1802 const unsigned int flags = msg->msg_flags;
1da177e4
LT		 1803
1804 BT_DBG("sock %p sk %p", sock, sk);
1805
0b59e272 1806 if (flags & MSG_OOB)
1da177e4
LT		 1807 return -EOPNOTSUPP;
1808
0b59e272 1809 if (flags & ~(MSG_DONTWAIT | MSG_NOSIGNAL | MSG_ERRQUEUE | MSG_CMSG_COMPAT))
1da177e4
LT		 1810 return -EINVAL;
1811
09572fca 1812 if (len < 4 || len > hci_pi(sk)->mtu)
1da177e4
LT		 1813 return -EINVAL;
1814
64ba2eb3
LAD		 1815 skb = bt_skb_sendmsg(sk, msg, len, len, 0, 0);
1816 if (IS_ERR(skb))
1817 return PTR_ERR(skb);
0b59e272 1818
1da177e4
LT		 1819 lock_sock(sk);
1820
0381101f
JH		 1821 switch (hci_pi(sk)->channel) {
1822 case HCI_CHANNEL_RAW:
23500189 1823 case HCI_CHANNEL_USER:
0381101f 1824 break;
cd82e61c
MH		 1825 case HCI_CHANNEL_MONITOR:
1826 err = -EOPNOTSUPP;
64ba2eb3 1827 goto drop;
ac714949 1828 case HCI_CHANNEL_LOGGING:
64ba2eb3
LAD		 1829 err = hci_logging_frame(sk, skb, flags);
1830 goto drop;
0381101f 1831 default:
801c1e8d
JH		 1832 mutex_lock(&mgmt_chan_list_lock);
1833 chan = __hci_mgmt_chan_find(hci_pi(sk)->channel);
1834 if (chan)
64ba2eb3 1835 err = hci_mgmt_cmd(chan, sk, skb);
801c1e8d
JH		 1836 else
1837 err = -EINVAL;
1838
1839 mutex_unlock(&mgmt_chan_list_lock);
64ba2eb3 1840 goto drop;
0381101f
JH		 1841 }
1842
e0448092
TH		 1843 hdev = hci_hdev_from_sock(sk);
1844 if (IS_ERR(hdev)) {
1845 err = PTR_ERR(hdev);
64ba2eb3 1846 goto drop;
1da177e4
LT		 1847 }
1848
7e21addc
MH		 1849 if (!test_bit(HCI_UP, &hdev->flags)) {
1850 err = -ENETDOWN;
64ba2eb3 1851 goto drop;
7e21addc
MH		 1852 }
1853
8528d3f7 1854 hci_skb_pkt_type(skb) = skb->data[0];
1da177e4 1855 skb_pull(skb, 1);
1da177e4 1856
1bc5ad16
MH		 1857 if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
1858 /* No permission check is needed for user channel
1859 * since that gets enforced when binding the socket.
1860 *
1861 * However check that the packet type is valid.
1862 */
d79f34e3
MH		 1863 if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT &&
1864 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
cc974003
MH		 1865 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
1866 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
1bc5ad16
MH		 1867 err = -EINVAL;
1868 goto drop;
1869 }
1870
1871 skb_queue_tail(&hdev->raw_q, skb);
1872 queue_work(hdev->workqueue, &hdev->tx_work);
d79f34e3 1873 } else if (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT) {
83985319 1874 u16 opcode = get_unaligned_le16(skb->data);
1da177e4
LT		 1875 u16 ogf = hci_opcode_ogf(opcode);
1876 u16 ocf = hci_opcode_ocf(opcode);
1877
1878 if (((ogf > HCI_SFLT_MAX_OGF) ||
3bb3c755
GP		 1879 !hci_test_bit(ocf & HCI_FLT_OCF_BITS,
1880 &hci_sec_filter.ocf_mask[ogf])) &&
1881 !capable(CAP_NET_RAW)) {
1da177e4
LT		 1882 err = -EPERM;
1883 goto drop;
1884 }
1885
1982162b
MH		 1886 /* Since the opcode has already been extracted here, store
1887 * a copy of the value for later use by the drivers.
1888 */
1889 hci_skb_opcode(skb) = opcode;
1890
fee746b0 1891 if (ogf == 0x3f) {
1da177e4 1892 skb_queue_tail(&hdev->raw_q, skb);
3eff45ea 1893 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 1894 } else {
49c922bb 1895 /* Stand-alone HCI commands must be flagged as
11714b3d
JH		 1896 * single-command requests.
1897 */
44d27137 1898 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
11714b3d 1899
1da177e4 1900 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 1901 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 1902 }
1903 } else {
1904 if (!capable(CAP_NET_RAW)) {
1905 err = -EPERM;
1906 goto drop;
1907 }
1908
d79f34e3 1909 if (hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
cc974003
MH		 1910 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
1911 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
bb77543e
MH		 1912 err = -EINVAL;
1913 goto drop;
1914 }
1915
1da177e4 1916 skb_queue_tail(&hdev->raw_q, skb);
3eff45ea 1917 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 1918 }
1919
1920 err = len;
1921
1922done:
1923 release_sock(sk);
1924 return err;
1925
1926drop:
1927 kfree_skb(skb);
1928 goto done;
1929}
1930
09572fca
LAD		 1931static int hci_sock_setsockopt_old(struct socket *sock, int level, int optname,
1932 sockptr_t optval, unsigned int len)
1da177e4
LT		 1933{
1934 struct hci_ufilter uf = { .opcode = 0 };
1935 struct sock *sk = sock->sk;
1936 int err = 0, opt = 0;
1937
1938 BT_DBG("sk %p, opt %d", sk, optname);
1939
1940 lock_sock(sk);
1941
2f39cdb7 1942 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
c2371e80 1943 err = -EBADFD;
2f39cdb7
MH		 1944 goto done;
1945 }
1946
1da177e4
LT		 1947 switch (optname) {
1948 case HCI_DATA_DIR:
a7b75c5a 1949 if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
1da177e4
LT		 1950 err = -EFAULT;
1951 break;
1952 }
1953
1954 if (opt)
1955 hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR;
1956 else
1957 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR;
1958 break;
1959
1960 case HCI_TIME_STAMP:
a7b75c5a 1961 if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
1da177e4
LT		 1962 err = -EFAULT;
1963 break;
1964 }
1965
1966 if (opt)
1967 hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP;
1968 else
1969 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP;
1970 break;
1971
1972 case HCI_FILTER:
0878b666
MH		 1973 {
1974 struct hci_filter *f = &hci_pi(sk)->filter;
1975
1976 uf.type_mask = f->type_mask;
1977 uf.opcode = f->opcode;
1978 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
1979 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
1980 }
1981
1da177e4 1982 len = min_t(unsigned int, len, sizeof(uf));
a7b75c5a 1983 if (copy_from_sockptr(&uf, optval, len)) {
1da177e4
LT		 1984 err = -EFAULT;
1985 break;
1986 }
1987
1988 if (!capable(CAP_NET_RAW)) {
1989 uf.type_mask &= hci_sec_filter.type_mask;
1990 uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0);
1991 uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1);
1992 }
1993
1994 {
1995 struct hci_filter *f = &hci_pi(sk)->filter;
1996
1997 f->type_mask = uf.type_mask;
1998 f->opcode = uf.opcode;
1999 *((u32 *) f->event_mask + 0) = uf.event_mask[0];
2000 *((u32 *) f->event_mask + 1) = uf.event_mask[1];
2001 }
8e87d142 2002 break;
1da177e4
LT		 2003
2004 default:
2005 err = -ENOPROTOOPT;
2006 break;
2007 }
2008
2f39cdb7 2009done:
1da177e4
LT		 2010 release_sock(sk);
2011 return err;
2012}
2013
09572fca
LAD		 2014static int hci_sock_setsockopt(struct socket *sock, int level, int optname,
2015 sockptr_t optval, unsigned int len)
1da177e4 2016{
1da177e4 2017 struct sock *sk = sock->sk;
b9f9dbad
DC		 2018 int err = 0;
2019 u16 opt;
cedc5469
MH		 2020
2021 BT_DBG("sk %p, opt %d", sk, optname);
1da177e4 2022
09572fca
LAD		 2023 if (level == SOL_HCI)
2024 return hci_sock_setsockopt_old(sock, level, optname, optval,
2025 len);
2026
2027 if (level != SOL_BLUETOOTH)
47b0f573
MH		 2028 return -ENOPROTOOPT;
2029
09572fca
LAD		 2030 lock_sock(sk);
2031
2032 switch (optname) {
2033 case BT_SNDMTU:
2034 case BT_RCVMTU:
2035 switch (hci_pi(sk)->channel) {
2036 /* Don't allow changing MTU for channels that are meant for HCI
2037 * traffic only.
2038 */
2039 case HCI_CHANNEL_RAW:
2040 case HCI_CHANNEL_USER:
2041 err = -ENOPROTOOPT;
2042 goto done;
2043 }
2044
b9f9dbad 2045 if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
09572fca
LAD		 2046 err = -EFAULT;
2047 break;
2048 }
2049
2050 hci_pi(sk)->mtu = opt;
2051 break;
2052
2053 default:
2054 err = -ENOPROTOOPT;
2055 break;
2056 }
2057
2058done:
2059 release_sock(sk);
2060 return err;
2061}
2062
2063static int hci_sock_getsockopt_old(struct socket *sock, int level, int optname,
2064 char __user *optval, int __user *optlen)
2065{
2066 struct hci_ufilter uf;
2067 struct sock *sk = sock->sk;
2068 int len, opt, err = 0;
2069
2070 BT_DBG("sk %p, opt %d", sk, optname);
2071
1da177e4
LT		 2072 if (get_user(len, optlen))
2073 return -EFAULT;
2074
cedc5469
MH		 2075 lock_sock(sk);
2076
2077 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
c2371e80 2078 err = -EBADFD;
cedc5469
MH		 2079 goto done;
2080 }
2081
1da177e4
LT		 2082 switch (optname) {
2083 case HCI_DATA_DIR:
2084 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR)
2085 opt = 1;
8e87d142 2086 else
1da177e4
LT		 2087 opt = 0;
2088
2089 if (put_user(opt, optval))
cedc5469 2090 err = -EFAULT;
1da177e4
LT		 2091 break;
2092
2093 case HCI_TIME_STAMP:
2094 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP)
2095 opt = 1;
8e87d142 2096 else
1da177e4
LT		 2097 opt = 0;
2098
2099 if (put_user(opt, optval))
cedc5469 2100 err = -EFAULT;
1da177e4
LT		 2101 break;
2102
2103 case HCI_FILTER:
2104 {
2105 struct hci_filter *f = &hci_pi(sk)->filter;
2106
e15ca9a0 2107 memset(&uf, 0, sizeof(uf));
1da177e4
LT		 2108 uf.type_mask = f->type_mask;
2109 uf.opcode = f->opcode;
2110 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
2111 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
2112 }
2113
2114 len = min_t(unsigned int, len, sizeof(uf));
2115 if (copy_to_user(optval, &uf, len))
cedc5469 2116 err = -EFAULT;
1da177e4
LT		 2117 break;
2118
2119 default:
cedc5469 2120 err = -ENOPROTOOPT;
1da177e4
LT		 2121 break;
2122 }
2123
cedc5469
MH		 2124done:
2125 release_sock(sk);
2126 return err;
1da177e4
LT		 2127}
2128
09572fca
LAD		 2129static int hci_sock_getsockopt(struct socket *sock, int level, int optname,
2130 char __user *optval, int __user *optlen)
2131{
2132 struct sock *sk = sock->sk;
2133 int err = 0;
2134
2135 BT_DBG("sk %p, opt %d", sk, optname);
2136
2137 if (level == SOL_HCI)
2138 return hci_sock_getsockopt_old(sock, level, optname, optval,
2139 optlen);
2140
2141 if (level != SOL_BLUETOOTH)
2142 return -ENOPROTOOPT;
2143
2144 lock_sock(sk);
2145
2146 switch (optname) {
2147 case BT_SNDMTU:
2148 case BT_RCVMTU:
2149 if (put_user(hci_pi(sk)->mtu, (u16 __user *)optval))
2150 err = -EFAULT;
2151 break;
2152
2153 default:
2154 err = -ENOPROTOOPT;
2155 break;
2156 }
2157
2158 release_sock(sk);
2159 return err;
2160}
2161
709fca50
NDP		 2162static void hci_sock_destruct(struct sock *sk)
2163{
b338d917 2164 mgmt_cleanup(sk);
709fca50
NDP		 2165 skb_queue_purge(&sk->sk_receive_queue);
2166 skb_queue_purge(&sk->sk_write_queue);
2167}
2168
90ddc4f0 2169static const struct proto_ops hci_sock_ops = {
1da177e4
LT		 2170 .family = PF_BLUETOOTH,
2171 .owner = THIS_MODULE,
2172 .release = hci_sock_release,
2173 .bind = hci_sock_bind,
2174 .getname = hci_sock_getname,
2175 .sendmsg = hci_sock_sendmsg,
2176 .recvmsg = hci_sock_recvmsg,
2177 .ioctl = hci_sock_ioctl,
7a6038b3
AB		 2178#ifdef CONFIG_COMPAT
2179 .compat_ioctl = hci_sock_compat_ioctl,
2180#endif
a11e1d43 2181 .poll = datagram_poll,
1da177e4
LT		 2182 .listen = sock_no_listen,
2183 .shutdown = sock_no_shutdown,
2184 .setsockopt = hci_sock_setsockopt,
2185 .getsockopt = hci_sock_getsockopt,
2186 .connect = sock_no_connect,
2187 .socketpair = sock_no_socketpair,
2188 .accept = sock_no_accept,
2189 .mmap = sock_no_mmap
2190};
2191
2192static struct proto hci_sk_proto = {
2193 .name = "HCI",
2194 .owner = THIS_MODULE,
2195 .obj_size = sizeof(struct hci_pinfo)
2196};
2197
3f378b68
EP		 2198static int hci_sock_create(struct net *net, struct socket *sock, int protocol,
2199 int kern)
1da177e4
LT		 2200{
2201 struct sock *sk;
2202
2203 BT_DBG("sock %p", sock);
2204
2205 if (sock->type != SOCK_RAW)
2206 return -ESOCKTNOSUPPORT;
2207
2208 sock->ops = &hci_sock_ops;
2209
6bfa273e
LAD		 2210 sk = bt_sock_alloc(net, sock, &hci_sk_proto, protocol, GFP_ATOMIC,
2211 kern);
1da177e4
LT		 2212 if (!sk)
2213 return -ENOMEM;
2214
1da177e4 2215 sock->state = SS_UNCONNECTED;
709fca50 2216 sk->sk_destruct = hci_sock_destruct;
1da177e4
LT		 2217
2218 bt_sock_link(&hci_sk_list, sk);
2219 return 0;
2220}
2221
ec1b4cf7 2222static const struct net_proto_family hci_sock_family_ops = {
1da177e4
LT		 2223 .family = PF_BLUETOOTH,
2224 .owner = THIS_MODULE,
2225 .create = hci_sock_create,
2226};
2227
1da177e4
LT		 2228int __init hci_sock_init(void)
2229{
2230 int err;
2231
b0a8e282
MH		 2232 BUILD_BUG_ON(sizeof(struct sockaddr_hci) > sizeof(struct sockaddr));
2233
1da177e4
LT		 2234 err = proto_register(&hci_sk_proto, 0);
2235 if (err < 0)
2236 return err;
2237
2238 err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops);
f7c86637
MY		 2239 if (err < 0) {
2240 BT_ERR("HCI socket registration failed");
1da177e4 2241 goto error;
f7c86637
MY		 2242 }
2243
b0316615 2244 err = bt_procfs_init(&init_net, "hci", &hci_sk_list, NULL);
f7c86637
MY		 2245 if (err < 0) {
2246 BT_ERR("Failed to create HCI proc file");
2247 bt_sock_unregister(BTPROTO_HCI);
2248 goto error;
2249 }
1da177e4 2250
1da177e4
LT		 2251 BT_INFO("HCI socket layer initialized");
2252
2253 return 0;
2254
2255error:
1da177e4
LT		 2256 proto_unregister(&hci_sk_proto);
2257 return err;
2258}
2259
b7440a14 2260void hci_sock_cleanup(void)
1da177e4 2261{
f7c86637 2262 bt_procfs_cleanup(&init_net, "hci");
5e9d7f86 2263 bt_sock_unregister(BTPROTO_HCI);
1da177e4 2264 proto_unregister(&hci_sk_proto);
1da177e4 2265}
Linux 6.x block layer and io_uring tree(s)