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Merge tag 'x86-boot-2023-02-20' of git://git.kernel.org/pub/scm/linux/kernel/git...
[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
7129069e 267/* Send frame to sockets with specific channel */
a9ee77af
SAS		 268static void __hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
269 int flag, struct sock *skip_sk)
470fe1b5
MH		 270{
271 struct sock *sk;
470fe1b5 272
7129069e 273 BT_DBG("channel %u len %d", channel, skb->len);
470fe1b5 274
b67bfe0d 275 sk_for_each(sk, &hci_sk_list.head) {
470fe1b5
MH		 276 struct sk_buff *nskb;
277
c08b1a1d 278 /* Ignore socket without the flag set */
c85be545 279 if (!hci_sock_test_flag(sk, flag))
d7f72f61
MH		 280 continue;
281
c08b1a1d
MH		 282 /* Skip the original socket */
283 if (sk == skip_sk)
17711c62
MH		 284 continue;
285
286 if (sk->sk_state != BT_BOUND)
287 continue;
288
289 if (hci_pi(sk)->channel != channel)
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
a9ee77af
SAS		 300}
301
302void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
303 int flag, struct sock *skip_sk)
304{
305 read_lock(&hci_sk_list.lock);
306 __hci_send_to_channel(channel, skb, flag, skip_sk);
17711c62
MH		 307 read_unlock(&hci_sk_list.lock);
308}
309
cd82e61c
MH		 310/* Send frame to monitor socket */
311void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb)
312{
cd82e61c 313 struct sk_buff *skb_copy = NULL;
2b531294 314 struct hci_mon_hdr *hdr;
cd82e61c
MH		 315 __le16 opcode;
316
317 if (!atomic_read(&monitor_promisc))
318 return;
319
320 BT_DBG("hdev %p len %d", hdev, skb->len);
321
d79f34e3 322 switch (hci_skb_pkt_type(skb)) {
cd82e61c 323 case HCI_COMMAND_PKT:
dcf4adbf 324 opcode = cpu_to_le16(HCI_MON_COMMAND_PKT);
cd82e61c
MH		 325 break;
326 case HCI_EVENT_PKT:
dcf4adbf 327 opcode = cpu_to_le16(HCI_MON_EVENT_PKT);
cd82e61c
MH		 328 break;
329 case HCI_ACLDATA_PKT:
330 if (bt_cb(skb)->incoming)
dcf4adbf 331 opcode = cpu_to_le16(HCI_MON_ACL_RX_PKT);
cd82e61c 332 else
dcf4adbf 333 opcode = cpu_to_le16(HCI_MON_ACL_TX_PKT);
cd82e61c
MH		 334 break;
335 case HCI_SCODATA_PKT:
336 if (bt_cb(skb)->incoming)
dcf4adbf 337 opcode = cpu_to_le16(HCI_MON_SCO_RX_PKT);
cd82e61c 338 else
dcf4adbf 339 opcode = cpu_to_le16(HCI_MON_SCO_TX_PKT);
cd82e61c 340 break;
f9a619db
LAD		 341 case HCI_ISODATA_PKT:
342 if (bt_cb(skb)->incoming)
343 opcode = cpu_to_le16(HCI_MON_ISO_RX_PKT);
344 else
345 opcode = cpu_to_le16(HCI_MON_ISO_TX_PKT);
346 break;
e875ff84
MH		 347 case HCI_DIAG_PKT:
348 opcode = cpu_to_le16(HCI_MON_VENDOR_DIAG);
349 break;
cd82e61c
MH		 350 default:
351 return;
352 }
353
2b531294
MH		 354 /* Create a private copy with headroom */
355 skb_copy = __pskb_copy_fclone(skb, HCI_MON_HDR_SIZE, GFP_ATOMIC, true);
356 if (!skb_copy)
357 return;
358
359 /* Put header before the data */
d58ff351 360 hdr = skb_push(skb_copy, HCI_MON_HDR_SIZE);
2b531294
MH		 361 hdr->opcode = opcode;
362 hdr->index = cpu_to_le16(hdev->id);
363 hdr->len = cpu_to_le16(skb->len);
364
c08b1a1d
MH		 365 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb_copy,
366 HCI_SOCK_TRUSTED, NULL);
cd82e61c
MH		 367 kfree_skb(skb_copy);
368}
369
38ceaa00
MH		 370void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
371 void *data, u16 data_len, ktime_t tstamp,
372 int flag, struct sock *skip_sk)
373{
374 struct sock *sk;
375 __le16 index;
376
377 if (hdev)
378 index = cpu_to_le16(hdev->id);
379 else
380 index = cpu_to_le16(MGMT_INDEX_NONE);
381
382 read_lock(&hci_sk_list.lock);
383
384 sk_for_each(sk, &hci_sk_list.head) {
385 struct hci_mon_hdr *hdr;
386 struct sk_buff *skb;
387
388 if (hci_pi(sk)->channel != HCI_CHANNEL_CONTROL)
389 continue;
390
391 /* Ignore socket without the flag set */
392 if (!hci_sock_test_flag(sk, flag))
393 continue;
394
395 /* Skip the original socket */
396 if (sk == skip_sk)
397 continue;
398
399 skb = bt_skb_alloc(6 + data_len, GFP_ATOMIC);
400 if (!skb)
401 continue;
402
403 put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
404 put_unaligned_le16(event, skb_put(skb, 2));
405
406 if (data)
59ae1d12 407 skb_put_data(skb, data, data_len);
38ceaa00
MH		 408
409 skb->tstamp = tstamp;
410
d58ff351 411 hdr = skb_push(skb, HCI_MON_HDR_SIZE);
38ceaa00
MH		 412 hdr->opcode = cpu_to_le16(HCI_MON_CTRL_EVENT);
413 hdr->index = index;
414 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
415
a9ee77af
SAS		 416 __hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
417 HCI_SOCK_TRUSTED, NULL);
38ceaa00
MH		 418 kfree_skb(skb);
419 }
420
421 read_unlock(&hci_sk_list.lock);
422}
423
cd82e61c
MH		 424static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event)
425{
426 struct hci_mon_hdr *hdr;
427 struct hci_mon_new_index *ni;
6c566dd5 428 struct hci_mon_index_info *ii;
cd82e61c
MH		 429 struct sk_buff *skb;
430 __le16 opcode;
431
432 switch (event) {
433 case HCI_DEV_REG:
434 skb = bt_skb_alloc(HCI_MON_NEW_INDEX_SIZE, GFP_ATOMIC);
435 if (!skb)
436 return NULL;
437
4df864c1 438 ni = skb_put(skb, HCI_MON_NEW_INDEX_SIZE);
cd82e61c
MH		 439 ni->type = hdev->dev_type;
440 ni->bus = hdev->bus;
441 bacpy(&ni->bdaddr, &hdev->bdaddr);
442 memcpy(ni->name, hdev->name, 8);
443
dcf4adbf 444 opcode = cpu_to_le16(HCI_MON_NEW_INDEX);
cd82e61c
MH		 445 break;
446
447 case HCI_DEV_UNREG:
448 skb = bt_skb_alloc(0, GFP_ATOMIC);
449 if (!skb)
450 return NULL;
451
dcf4adbf 452 opcode = cpu_to_le16(HCI_MON_DEL_INDEX);
cd82e61c
MH		 453 break;
454
e131d74a
MH		 455 case HCI_DEV_SETUP:
456 if (hdev->manufacturer == 0xffff)
457 return NULL;
19186c7b 458 fallthrough;
e131d74a 459
6c566dd5
MH		 460 case HCI_DEV_UP:
461 skb = bt_skb_alloc(HCI_MON_INDEX_INFO_SIZE, GFP_ATOMIC);
462 if (!skb)
463 return NULL;
464
4df864c1 465 ii = skb_put(skb, HCI_MON_INDEX_INFO_SIZE);
6c566dd5
MH		 466 bacpy(&ii->bdaddr, &hdev->bdaddr);
467 ii->manufacturer = cpu_to_le16(hdev->manufacturer);
468
469 opcode = cpu_to_le16(HCI_MON_INDEX_INFO);
470 break;
471
22db3cbc
MH		 472 case HCI_DEV_OPEN:
473 skb = bt_skb_alloc(0, GFP_ATOMIC);
474 if (!skb)
475 return NULL;
476
477 opcode = cpu_to_le16(HCI_MON_OPEN_INDEX);
478 break;
479
480 case HCI_DEV_CLOSE:
481 skb = bt_skb_alloc(0, GFP_ATOMIC);
482 if (!skb)
483 return NULL;
484
485 opcode = cpu_to_le16(HCI_MON_CLOSE_INDEX);
486 break;
487
cd82e61c
MH		 488 default:
489 return NULL;
490 }
491
492 __net_timestamp(skb);
493
d58ff351 494 hdr = skb_push(skb, HCI_MON_HDR_SIZE);
cd82e61c
MH		 495 hdr->opcode = opcode;
496 hdr->index = cpu_to_le16(hdev->id);
497 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
498
499 return skb;
500}
501
249fa169
MH		 502static struct sk_buff *create_monitor_ctrl_open(struct sock *sk)
503{
504 struct hci_mon_hdr *hdr;
505 struct sk_buff *skb;
d0bef1d2 506 u16 format;
249fa169
MH		 507 u8 ver[3];
508 u32 flags;
509
0ef2c42f
MH		 510 /* No message needed when cookie is not present */
511 if (!hci_pi(sk)->cookie)
512 return NULL;
513
d0bef1d2 514 switch (hci_pi(sk)->channel) {
f81f5b2d
MH		 515 case HCI_CHANNEL_RAW:
516 format = 0x0000;
517 ver[0] = BT_SUBSYS_VERSION;
518 put_unaligned_le16(BT_SUBSYS_REVISION, ver + 1);
519 break;
aa1638dd
MH		 520 case HCI_CHANNEL_USER:
521 format = 0x0001;
522 ver[0] = BT_SUBSYS_VERSION;
523 put_unaligned_le16(BT_SUBSYS_REVISION, ver + 1);
524 break;
d0bef1d2
MH		 525 case HCI_CHANNEL_CONTROL:
526 format = 0x0002;
527 mgmt_fill_version_info(ver);
528 break;
529 default:
530 /* No message for unsupported format */
531 return NULL;
532 }
533
249fa169
MH		 534 skb = bt_skb_alloc(14 + TASK_COMM_LEN , GFP_ATOMIC);
535 if (!skb)
536 return NULL;
537
249fa169
MH		 538 flags = hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) ? 0x1 : 0x0;
539
540 put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
541 put_unaligned_le16(format, skb_put(skb, 2));
59ae1d12 542 skb_put_data(skb, ver, sizeof(ver));
249fa169 543 put_unaligned_le32(flags, skb_put(skb, 4));
634fef61 544 skb_put_u8(skb, TASK_COMM_LEN);
59ae1d12 545 skb_put_data(skb, hci_pi(sk)->comm, TASK_COMM_LEN);
249fa169
MH		 546
547 __net_timestamp(skb);
548
d58ff351 549 hdr = skb_push(skb, HCI_MON_HDR_SIZE);
249fa169 550 hdr->opcode = cpu_to_le16(HCI_MON_CTRL_OPEN);
0ef2c42f
MH		 551 if (hci_pi(sk)->hdev)
552 hdr->index = cpu_to_le16(hci_pi(sk)->hdev->id);
553 else
554 hdr->index = cpu_to_le16(HCI_DEV_NONE);
249fa169
MH		 555 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
556
557 return skb;
558}
559
560static struct sk_buff *create_monitor_ctrl_close(struct sock *sk)
561{
562 struct hci_mon_hdr *hdr;
563 struct sk_buff *skb;
564
0ef2c42f
MH		 565 /* No message needed when cookie is not present */
566 if (!hci_pi(sk)->cookie)
567 return NULL;
568
d0bef1d2 569 switch (hci_pi(sk)->channel) {
f81f5b2d 570 case HCI_CHANNEL_RAW:
aa1638dd 571 case HCI_CHANNEL_USER:
d0bef1d2
MH		 572 case HCI_CHANNEL_CONTROL:
573 break;
574 default:
575 /* No message for unsupported format */
576 return NULL;
577 }
578
249fa169
MH		 579 skb = bt_skb_alloc(4, GFP_ATOMIC);
580 if (!skb)
581 return NULL;
582
583 put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
584
585 __net_timestamp(skb);
586
d58ff351 587 hdr = skb_push(skb, HCI_MON_HDR_SIZE);
249fa169 588 hdr->opcode = cpu_to_le16(HCI_MON_CTRL_CLOSE);
0ef2c42f
MH		 589 if (hci_pi(sk)->hdev)
590 hdr->index = cpu_to_le16(hci_pi(sk)->hdev->id);
591 else
592 hdr->index = cpu_to_le16(HCI_DEV_NONE);
249fa169
MH		 593 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
594
595 return skb;
596}
597
38ceaa00
MH		 598static struct sk_buff *create_monitor_ctrl_command(struct sock *sk, u16 index,
599 u16 opcode, u16 len,
600 const void *buf)
601{
602 struct hci_mon_hdr *hdr;
603 struct sk_buff *skb;
604
605 skb = bt_skb_alloc(6 + len, GFP_ATOMIC);
606 if (!skb)
607 return NULL;
608
609 put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
610 put_unaligned_le16(opcode, skb_put(skb, 2));
611
612 if (buf)
59ae1d12 613 skb_put_data(skb, buf, len);
38ceaa00
MH		 614
615 __net_timestamp(skb);
616
d58ff351 617 hdr = skb_push(skb, HCI_MON_HDR_SIZE);
38ceaa00
MH		 618 hdr->opcode = cpu_to_le16(HCI_MON_CTRL_COMMAND);
619 hdr->index = cpu_to_le16(index);
620 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
621
622 return skb;
623}
624
787b306c
JB		 625static void __printf(2, 3)
626send_monitor_note(struct sock *sk, const char *fmt, ...)
dd31506d 627{
787b306c 628 size_t len;
dd31506d
MH		 629 struct hci_mon_hdr *hdr;
630 struct sk_buff *skb;
787b306c
JB		 631 va_list args;
632
633 va_start(args, fmt);
634 len = vsnprintf(NULL, 0, fmt, args);
635 va_end(args);
dd31506d
MH		 636
637 skb = bt_skb_alloc(len + 1, GFP_ATOMIC);
638 if (!skb)
639 return;
640
787b306c
JB		 641 va_start(args, fmt);
642 vsprintf(skb_put(skb, len), fmt, args);
4df864c1 643 *(u8 *)skb_put(skb, 1) = 0;
787b306c 644 va_end(args);
dd31506d
MH		 645
646 __net_timestamp(skb);
647
648 hdr = (void *)skb_push(skb, HCI_MON_HDR_SIZE);
649 hdr->opcode = cpu_to_le16(HCI_MON_SYSTEM_NOTE);
650 hdr->index = cpu_to_le16(HCI_DEV_NONE);
651 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
652
653 if (sock_queue_rcv_skb(sk, skb))
654 kfree_skb(skb);
655}
656
cd82e61c
MH		 657static void send_monitor_replay(struct sock *sk)
658{
659 struct hci_dev *hdev;
660
661 read_lock(&hci_dev_list_lock);
662
663 list_for_each_entry(hdev, &hci_dev_list, list) {
664 struct sk_buff *skb;
665
666 skb = create_monitor_event(hdev, HCI_DEV_REG);
667 if (!skb)
668 continue;
669
670 if (sock_queue_rcv_skb(sk, skb))
671 kfree_skb(skb);
22db3cbc
MH		 672
673 if (!test_bit(HCI_RUNNING, &hdev->flags))
674 continue;
675
676 skb = create_monitor_event(hdev, HCI_DEV_OPEN);
677 if (!skb)
678 continue;
679
680 if (sock_queue_rcv_skb(sk, skb))
681 kfree_skb(skb);
6c566dd5 682
e131d74a
MH		 683 if (test_bit(HCI_UP, &hdev->flags))
684 skb = create_monitor_event(hdev, HCI_DEV_UP);
685 else if (hci_dev_test_flag(hdev, HCI_SETUP))
686 skb = create_monitor_event(hdev, HCI_DEV_SETUP);
687 else
688 skb = NULL;
6c566dd5 689
e131d74a
MH		 690 if (skb) {
691 if (sock_queue_rcv_skb(sk, skb))
692 kfree_skb(skb);
693 }
cd82e61c
MH		 694 }
695
696 read_unlock(&hci_dev_list_lock);
697}
698
249fa169
MH		 699static void send_monitor_control_replay(struct sock *mon_sk)
700{
701 struct sock *sk;
702
703 read_lock(&hci_sk_list.lock);
704
705 sk_for_each(sk, &hci_sk_list.head) {
706 struct sk_buff *skb;
707
249fa169
MH		 708 skb = create_monitor_ctrl_open(sk);
709 if (!skb)
710 continue;
711
712 if (sock_queue_rcv_skb(mon_sk, skb))
713 kfree_skb(skb);
714 }
715
716 read_unlock(&hci_sk_list.lock);
717}
718
040030ef
MH		 719/* Generate internal stack event */
720static void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data)
721{
722 struct hci_event_hdr *hdr;
723 struct hci_ev_stack_internal *ev;
724 struct sk_buff *skb;
725
726 skb = bt_skb_alloc(HCI_EVENT_HDR_SIZE + sizeof(*ev) + dlen, GFP_ATOMIC);
727 if (!skb)
728 return;
729
4df864c1 730 hdr = skb_put(skb, HCI_EVENT_HDR_SIZE);
040030ef
MH		 731 hdr->evt = HCI_EV_STACK_INTERNAL;
732 hdr->plen = sizeof(*ev) + dlen;
733
4df864c1 734 ev = skb_put(skb, sizeof(*ev) + dlen);
040030ef
MH		 735 ev->type = type;
736 memcpy(ev->data, data, dlen);
737
738 bt_cb(skb)->incoming = 1;
739 __net_timestamp(skb);
740
d79f34e3 741 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
040030ef
MH		 742 hci_send_to_sock(hdev, skb);
743 kfree_skb(skb);
744}
745
746void hci_sock_dev_event(struct hci_dev *hdev, int event)
747{
040030ef
MH		 748 BT_DBG("hdev %s event %d", hdev->name, event);
749
cd82e61c
MH		 750 if (atomic_read(&monitor_promisc)) {
751 struct sk_buff *skb;
752
ed1b28a4 753 /* Send event to monitor */
cd82e61c
MH		 754 skb = create_monitor_event(hdev, event);
755 if (skb) {
c08b1a1d
MH		 756 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
757 HCI_SOCK_TRUSTED, NULL);
cd82e61c
MH		 758 kfree_skb(skb);
759 }
760 }
761
ed1b28a4
MH		 762 if (event <= HCI_DEV_DOWN) {
763 struct hci_ev_si_device ev;
764
765 /* Send event to sockets */
766 ev.event = event;
767 ev.dev_id = hdev->id;
768 hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev);
769 }
040030ef
MH		 770
771 if (event == HCI_DEV_UNREG) {
772 struct sock *sk;
040030ef 773
e0448092 774 /* Wake up sockets using this dead device */
040030ef 775 read_lock(&hci_sk_list.lock);
b67bfe0d 776 sk_for_each(sk, &hci_sk_list.head) {
040030ef 777 if (hci_pi(sk)->hdev == hdev) {
040030ef 778 sk->sk_err = EPIPE;
040030ef 779 sk->sk_state_change(sk);
040030ef 780 }
040030ef
MH		 781 }
782 read_unlock(&hci_sk_list.lock);
783 }
784}
785
801c1e8d
JH		 786static struct hci_mgmt_chan *__hci_mgmt_chan_find(unsigned short channel)
787{
788 struct hci_mgmt_chan *c;
789
790 list_for_each_entry(c, &mgmt_chan_list, list) {
791 if (c->channel == channel)
792 return c;
793 }
794
795 return NULL;
796}
797
798static struct hci_mgmt_chan *hci_mgmt_chan_find(unsigned short channel)
799{
800 struct hci_mgmt_chan *c;
801
802 mutex_lock(&mgmt_chan_list_lock);
803 c = __hci_mgmt_chan_find(channel);
804 mutex_unlock(&mgmt_chan_list_lock);
805
806 return c;
807}
808
809int hci_mgmt_chan_register(struct hci_mgmt_chan *c)
810{
811 if (c->channel < HCI_CHANNEL_CONTROL)
812 return -EINVAL;
813
814 mutex_lock(&mgmt_chan_list_lock);
815 if (__hci_mgmt_chan_find(c->channel)) {
816 mutex_unlock(&mgmt_chan_list_lock);
817 return -EALREADY;
818 }
819
820 list_add_tail(&c->list, &mgmt_chan_list);
821
822 mutex_unlock(&mgmt_chan_list_lock);
823
824 return 0;
825}
826EXPORT_SYMBOL(hci_mgmt_chan_register);
827
828void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c)
829{
830 mutex_lock(&mgmt_chan_list_lock);
831 list_del(&c->list);
832 mutex_unlock(&mgmt_chan_list_lock);
833}
834EXPORT_SYMBOL(hci_mgmt_chan_unregister);
835
1da177e4
LT		 836static int hci_sock_release(struct socket *sock)
837{
838 struct sock *sk = sock->sk;
7b005bd3 839 struct hci_dev *hdev;
249fa169 840 struct sk_buff *skb;
1da177e4
LT		 841
842 BT_DBG("sock %p sk %p", sock, sk);
843
844 if (!sk)
845 return 0;
846
11eb85ec
DC		 847 lock_sock(sk);
848
70ecce91
MH		 849 switch (hci_pi(sk)->channel) {
850 case HCI_CHANNEL_MONITOR:
cd82e61c 851 atomic_dec(&monitor_promisc);
70ecce91 852 break;
f81f5b2d 853 case HCI_CHANNEL_RAW:
aa1638dd 854 case HCI_CHANNEL_USER:
70ecce91 855 case HCI_CHANNEL_CONTROL:
249fa169
MH		 856 /* Send event to monitor */
857 skb = create_monitor_ctrl_close(sk);
858 if (skb) {
859 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
860 HCI_SOCK_TRUSTED, NULL);
861 kfree_skb(skb);
862 }
863
df1cb87a 864 hci_sock_free_cookie(sk);
70ecce91
MH		 865 break;
866 }
cd82e61c 867
1da177e4
LT		 868 bt_sock_unlink(&hci_sk_list, sk);
869
e20a2e9c 870 hdev = hci_pi(sk)->hdev;
1da177e4 871 if (hdev) {
0acef50b
APS		 872 if (hci_pi(sk)->channel == HCI_CHANNEL_USER &&
873 !hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
9332ef9d 874 /* When releasing a user channel exclusive access,
6b3cc1db
SF		 875 * call hci_dev_do_close directly instead of calling
876 * hci_dev_close to ensure the exclusive access will
877 * be released and the controller brought back down.
878 *
879 * The checking of HCI_AUTO_OFF is not needed in this
880 * case since it will have been cleared already when
881 * opening the user channel.
0acef50b
APS		 882 *
883 * Make sure to also check that we haven't already
884 * unregistered since all the cleanup will have already
885 * been complete and hdev will get released when we put
886 * below.
6b3cc1db
SF		 887 */
888 hci_dev_do_close(hdev);
9380f9ea
LP		 889 hci_dev_clear_flag(hdev, HCI_USER_CHANNEL);
890 mgmt_index_added(hdev);
23500189
MH		 891 }
892
1da177e4
LT		 893 atomic_dec(&hdev->promisc);
894 hci_dev_put(hdev);
895 }
896
897 sock_orphan(sk);
11eb85ec 898 release_sock(sk);
1da177e4
LT		 899 sock_put(sk);
900 return 0;
901}
902
3d4f9c00 903static int hci_sock_reject_list_add(struct hci_dev *hdev, void __user *arg)
f0358568
JH		 904{
905 bdaddr_t bdaddr;
5e762444 906 int err;
f0358568
JH		 907
908 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
909 return -EFAULT;
910
09fd0de5 911 hci_dev_lock(hdev);
5e762444 912
3d4f9c00 913 err = hci_bdaddr_list_add(&hdev->reject_list, &bdaddr, BDADDR_BREDR);
5e762444 914
09fd0de5 915 hci_dev_unlock(hdev);
5e762444
AJ		 916
917 return err;
f0358568
JH		 918}
919
3d4f9c00 920static int hci_sock_reject_list_del(struct hci_dev *hdev, void __user *arg)
f0358568
JH		 921{
922 bdaddr_t bdaddr;
5e762444 923 int err;
f0358568
JH		 924
925 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
926 return -EFAULT;
927
09fd0de5 928 hci_dev_lock(hdev);
5e762444 929
3d4f9c00 930 err = hci_bdaddr_list_del(&hdev->reject_list, &bdaddr, BDADDR_BREDR);
5e762444 931
09fd0de5 932 hci_dev_unlock(hdev);
5e762444
AJ		 933
934 return err;
f0358568
JH		 935}
936
8e87d142 937/* Ioctls that require bound socket */
6039aa73
GP		 938static int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd,
939 unsigned long arg)
1da177e4 940{
e0448092 941 struct hci_dev *hdev = hci_hdev_from_sock(sk);
1da177e4 942
e0448092
TH		 943 if (IS_ERR(hdev))
944 return PTR_ERR(hdev);
1da177e4 945
d7a5a11d 946 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
0736cfa8
MH		 947 return -EBUSY;
948
d7a5a11d 949 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
fee746b0
MH		 950 return -EOPNOTSUPP;
951
ca8bee5d 952 if (hdev->dev_type != HCI_PRIMARY)
5b69bef5
MH		 953 return -EOPNOTSUPP;
954
1da177e4
LT		 955 switch (cmd) {
956 case HCISETRAW:
957 if (!capable(CAP_NET_ADMIN))
bf5b30b8 958 return -EPERM;
db596681 959 return -EOPNOTSUPP;
1da177e4 960
1da177e4 961 case HCIGETCONNINFO:
8528d3f7 962 return hci_get_conn_info(hdev, (void __user *)arg);
40be492f
MH		 963
964 case HCIGETAUTHINFO:
8528d3f7 965 return hci_get_auth_info(hdev, (void __user *)arg);
1da177e4 966
f0358568
JH		 967 case HCIBLOCKADDR:
968 if (!capable(CAP_NET_ADMIN))
bf5b30b8 969 return -EPERM;
3d4f9c00 970 return hci_sock_reject_list_add(hdev, (void __user *)arg);
f0358568
JH		 971
972 case HCIUNBLOCKADDR:
973 if (!capable(CAP_NET_ADMIN))
bf5b30b8 974 return -EPERM;
3d4f9c00 975 return hci_sock_reject_list_del(hdev, (void __user *)arg);
1da177e4 976 }
0736cfa8 977
324d36ed 978 return -ENOIOCTLCMD;
1da177e4
LT		 979}
980
8fc9ced3
GP		 981static int hci_sock_ioctl(struct socket *sock, unsigned int cmd,
982 unsigned long arg)
1da177e4 983{
8528d3f7 984 void __user *argp = (void __user *)arg;
0736cfa8 985 struct sock *sk = sock->sk;
1da177e4
LT		 986 int err;
987
988 BT_DBG("cmd %x arg %lx", cmd, arg);
989
c1c4f956
MH		 990 lock_sock(sk);
991
992 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
993 err = -EBADFD;
994 goto done;
995 }
996
f81f5b2d
MH		 997 /* When calling an ioctl on an unbound raw socket, then ensure
998 * that the monitor gets informed. Ensure that the resulting event
999 * is only send once by checking if the cookie exists or not. The
1000 * socket cookie will be only ever generated once for the lifetime
1001 * of a given socket.
1002 */
1003 if (hci_sock_gen_cookie(sk)) {
1004 struct sk_buff *skb;
1005
1006 if (capable(CAP_NET_ADMIN))
1007 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1008
1009 /* Send event to monitor */
1010 skb = create_monitor_ctrl_open(sk);
1011 if (skb) {
1012 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1013 HCI_SOCK_TRUSTED, NULL);
1014 kfree_skb(skb);
1015 }
1016 }
1017
c1c4f956
MH		 1018 release_sock(sk);
1019
1da177e4
LT		 1020 switch (cmd) {
1021 case HCIGETDEVLIST:
1022 return hci_get_dev_list(argp);
1023
1024 case HCIGETDEVINFO:
1025 return hci_get_dev_info(argp);
1026
1027 case HCIGETCONNLIST:
1028 return hci_get_conn_list(argp);
1029
1030 case HCIDEVUP:
1031 if (!capable(CAP_NET_ADMIN))
bf5b30b8 1032 return -EPERM;
1da177e4
LT		 1033 return hci_dev_open(arg);
1034
1035 case HCIDEVDOWN:
1036 if (!capable(CAP_NET_ADMIN))
bf5b30b8 1037 return -EPERM;
1da177e4
LT		 1038 return hci_dev_close(arg);
1039
1040 case HCIDEVRESET:
1041 if (!capable(CAP_NET_ADMIN))
bf5b30b8 1042 return -EPERM;
1da177e4
LT		 1043 return hci_dev_reset(arg);
1044
1045 case HCIDEVRESTAT:
1046 if (!capable(CAP_NET_ADMIN))
bf5b30b8 1047 return -EPERM;
1da177e4
LT		 1048 return hci_dev_reset_stat(arg);
1049
1050 case HCISETSCAN:
1051 case HCISETAUTH:
1052 case HCISETENCRYPT:
1053 case HCISETPTYPE:
1054 case HCISETLINKPOL:
1055 case HCISETLINKMODE:
1056 case HCISETACLMTU:
1057 case HCISETSCOMTU:
1058 if (!capable(CAP_NET_ADMIN))
bf5b30b8 1059 return -EPERM;
1da177e4
LT		 1060 return hci_dev_cmd(cmd, argp);
1061
1062 case HCIINQUIRY:
1063 return hci_inquiry(argp);
1da177e4 1064 }
c1c4f956
MH		 1065
1066 lock_sock(sk);
1067
1068 err = hci_sock_bound_ioctl(sk, cmd, arg);
1069
1070done:
1071 release_sock(sk);
1072 return err;
1da177e4
LT		 1073}
1074
7a6038b3
AB		 1075#ifdef CONFIG_COMPAT
1076static int hci_sock_compat_ioctl(struct socket *sock, unsigned int cmd,
1077 unsigned long arg)
1078{
1079 switch (cmd) {
1080 case HCIDEVUP:
1081 case HCIDEVDOWN:
1082 case HCIDEVRESET:
1083 case HCIDEVRESTAT:
1084 return hci_sock_ioctl(sock, cmd, arg);
1085 }
1086
1087 return hci_sock_ioctl(sock, cmd, (unsigned long)compat_ptr(arg));
1088}
1089#endif
1090
8fc9ced3
GP		 1091static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
1092 int addr_len)
1da177e4 1093{
0381101f 1094 struct sockaddr_hci haddr;
1da177e4
LT		 1095 struct sock *sk = sock->sk;
1096 struct hci_dev *hdev = NULL;
f4cdbb3f 1097 struct sk_buff *skb;
0381101f 1098 int len, err = 0;
1da177e4
LT		 1099
1100 BT_DBG("sock %p sk %p", sock, sk);
1101
0381101f
JH		 1102 if (!addr)
1103 return -EINVAL;
1104
1105 memset(&haddr, 0, sizeof(haddr));
1106 len = min_t(unsigned int, sizeof(haddr), addr_len);
1107 memcpy(&haddr, addr, len);
1108
1109 if (haddr.hci_family != AF_BLUETOOTH)
1110 return -EINVAL;
1111
1da177e4
LT		 1112 lock_sock(sk);
1113
e0448092
TH		 1114 /* Allow detaching from dead device and attaching to alive device, if
1115 * the caller wants to re-bind (instead of close) this socket in
1116 * response to hci_sock_dev_event(HCI_DEV_UNREG) notification.
1117 */
1118 hdev = hci_pi(sk)->hdev;
1119 if (hdev && hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1120 hci_pi(sk)->hdev = NULL;
1121 sk->sk_state = BT_OPEN;
1122 hci_dev_put(hdev);
1123 }
1124 hdev = NULL;
1125
7cc2ade2 1126 if (sk->sk_state == BT_BOUND) {
1da177e4
LT		 1127 err = -EALREADY;
1128 goto done;
1129 }
1130
7cc2ade2
MH		 1131 switch (haddr.hci_channel) {
1132 case HCI_CHANNEL_RAW:
1133 if (hci_pi(sk)->hdev) {
1134 err = -EALREADY;
1da177e4
LT		 1135 goto done;
1136 }
1137
7cc2ade2
MH		 1138 if (haddr.hci_dev != HCI_DEV_NONE) {
1139 hdev = hci_dev_get(haddr.hci_dev);
1140 if (!hdev) {
1141 err = -ENODEV;
1142 goto done;
1143 }
1144
1145 atomic_inc(&hdev->promisc);
1146 }
1147
5a6d2cf5 1148 hci_pi(sk)->channel = haddr.hci_channel;
f81f5b2d 1149
f4cdbb3f
MH		 1150 if (!hci_sock_gen_cookie(sk)) {
1151 /* In the case when a cookie has already been assigned,
1152 * then there has been already an ioctl issued against
91641b79 1153 * an unbound socket and with that triggered an open
f4cdbb3f
MH		 1154 * notification. Send a close notification first to
1155 * allow the state transition to bounded.
1156 */
1157 skb = create_monitor_ctrl_close(sk);
f81f5b2d
MH		 1158 if (skb) {
1159 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1160 HCI_SOCK_TRUSTED, NULL);
1161 kfree_skb(skb);
1162 }
1163 }
f4cdbb3f
MH		 1164
1165 if (capable(CAP_NET_ADMIN))
1166 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1167
1168 hci_pi(sk)->hdev = hdev;
1169
1170 /* Send event to monitor */
1171 skb = create_monitor_ctrl_open(sk);
1172 if (skb) {
1173 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1174 HCI_SOCK_TRUSTED, NULL);
1175 kfree_skb(skb);
1176 }
7cc2ade2
MH		 1177 break;
1178
23500189
MH		 1179 case HCI_CHANNEL_USER:
1180 if (hci_pi(sk)->hdev) {
1181 err = -EALREADY;
1182 goto done;
1183 }
1184
1185 if (haddr.hci_dev == HCI_DEV_NONE) {
1186 err = -EINVAL;
1187 goto done;
1188 }
1189
10a8b86f 1190 if (!capable(CAP_NET_ADMIN)) {
23500189
MH		 1191 err = -EPERM;
1192 goto done;
1193 }
1194
1195 hdev = hci_dev_get(haddr.hci_dev);
1196 if (!hdev) {
1197 err = -ENODEV;
1198 goto done;
1199 }
1200
781f899f 1201 if (test_bit(HCI_INIT, &hdev->flags) ||
d7a5a11d 1202 hci_dev_test_flag(hdev, HCI_SETUP) ||
781f899f
MH		 1203 hci_dev_test_flag(hdev, HCI_CONFIG) ||
1204 (!hci_dev_test_flag(hdev, HCI_AUTO_OFF) &&
1205 test_bit(HCI_UP, &hdev->flags))) {
23500189
MH		 1206 err = -EBUSY;
1207 hci_dev_put(hdev);
1208 goto done;
1209 }
1210
238be788 1211 if (hci_dev_test_and_set_flag(hdev, HCI_USER_CHANNEL)) {
23500189
MH		 1212 err = -EUSERS;
1213 hci_dev_put(hdev);
1214 goto done;
1215 }
1216
0602a8ad 1217 mgmt_index_removed(hdev);
23500189
MH		 1218
1219 err = hci_dev_open(hdev->id);
1220 if (err) {
781f899f
MH		 1221 if (err == -EALREADY) {
1222 /* In case the transport is already up and
1223 * running, clear the error here.
1224 *
9332ef9d 1225 * This can happen when opening a user
781f899f
MH		 1226 * channel and HCI_AUTO_OFF grace period
1227 * is still active.
1228 */
1229 err = 0;
1230 } else {
1231 hci_dev_clear_flag(hdev, HCI_USER_CHANNEL);
1232 mgmt_index_added(hdev);
1233 hci_dev_put(hdev);
1234 goto done;
1235 }
23500189
MH		 1236 }
1237
5a6d2cf5 1238 hci_pi(sk)->channel = haddr.hci_channel;
aa1638dd
MH		 1239
1240 if (!hci_sock_gen_cookie(sk)) {
1241 /* In the case when a cookie has already been assigned,
1242 * this socket will transition from a raw socket into
9332ef9d 1243 * a user channel socket. For a clean transition, send
aa1638dd
MH		 1244 * the close notification first.
1245 */
1246 skb = create_monitor_ctrl_close(sk);
1247 if (skb) {
1248 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1249 HCI_SOCK_TRUSTED, NULL);
1250 kfree_skb(skb);
1251 }
1252 }
1253
1254 /* The user channel is restricted to CAP_NET_ADMIN
1255 * capabilities and with that implicitly trusted.
1256 */
1257 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1258
23500189 1259 hci_pi(sk)->hdev = hdev;
5a6d2cf5 1260
aa1638dd
MH		 1261 /* Send event to monitor */
1262 skb = create_monitor_ctrl_open(sk);
1263 if (skb) {
1264 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1265 HCI_SOCK_TRUSTED, NULL);
1266 kfree_skb(skb);
1267 }
1268
5a6d2cf5 1269 atomic_inc(&hdev->promisc);
23500189
MH		 1270 break;
1271
cd82e61c
MH		 1272 case HCI_CHANNEL_MONITOR:
1273 if (haddr.hci_dev != HCI_DEV_NONE) {
1274 err = -EINVAL;
1275 goto done;
1276 }
1277
1278 if (!capable(CAP_NET_RAW)) {
1279 err = -EPERM;
1280 goto done;
1281 }
1282
5a6d2cf5
MH		 1283 hci_pi(sk)->channel = haddr.hci_channel;
1284
50ebc055
MH		 1285 /* The monitor interface is restricted to CAP_NET_RAW
1286 * capabilities and with that implicitly trusted.
1287 */
1288 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1289
787b306c
JB		 1290 send_monitor_note(sk, "Linux version %s (%s)",
1291 init_utsname()->release,
1292 init_utsname()->machine);
9e8305b3
MH		 1293 send_monitor_note(sk, "Bluetooth subsystem version %u.%u",
1294 BT_SUBSYS_VERSION, BT_SUBSYS_REVISION);
cd82e61c 1295 send_monitor_replay(sk);
249fa169 1296 send_monitor_control_replay(sk);
cd82e61c
MH		 1297
1298 atomic_inc(&monitor_promisc);
1299 break;
1300
ac714949
MH		 1301 case HCI_CHANNEL_LOGGING:
1302 if (haddr.hci_dev != HCI_DEV_NONE) {
1303 err = -EINVAL;
1304 goto done;
1305 }
1306
1307 if (!capable(CAP_NET_ADMIN)) {
1308 err = -EPERM;
1309 goto done;
1310 }
5a6d2cf5
MH		 1311
1312 hci_pi(sk)->channel = haddr.hci_channel;
ac714949
MH		 1313 break;
1314
7cc2ade2 1315 default:
801c1e8d
JH		 1316 if (!hci_mgmt_chan_find(haddr.hci_channel)) {
1317 err = -EINVAL;
1318 goto done;
1319 }
1320
1321 if (haddr.hci_dev != HCI_DEV_NONE) {
1322 err = -EINVAL;
1323 goto done;
1324 }
1325
1195fbb8
MH		 1326 /* Users with CAP_NET_ADMIN capabilities are allowed
1327 * access to all management commands and events. For
1328 * untrusted users the interface is restricted and
1329 * also only untrusted events are sent.
50ebc055 1330 */
1195fbb8
MH		 1331 if (capable(CAP_NET_ADMIN))
1332 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
50ebc055 1333
5a6d2cf5
MH		 1334 hci_pi(sk)->channel = haddr.hci_channel;
1335
f9207338
MH		 1336 /* At the moment the index and unconfigured index events
1337 * are enabled unconditionally. Setting them on each
1338 * socket when binding keeps this functionality. They
1339 * however might be cleared later and then sending of these
1340 * events will be disabled, but that is then intentional.
f6b7712e
MH		 1341 *
1342 * This also enables generic events that are safe to be
1343 * received by untrusted users. Example for such events
1344 * are changes to settings, class of device, name etc.
f9207338 1345 */
5a6d2cf5 1346 if (hci_pi(sk)->channel == HCI_CHANNEL_CONTROL) {
f4cdbb3f
MH		 1347 if (!hci_sock_gen_cookie(sk)) {
1348 /* In the case when a cookie has already been
91641b79 1349 * assigned, this socket will transition from
f4cdbb3f 1350 * a raw socket into a control socket. To
91641b79 1351 * allow for a clean transition, send the
f4cdbb3f
MH		 1352 * close notification first.
1353 */
1354 skb = create_monitor_ctrl_close(sk);
1355 if (skb) {
1356 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1357 HCI_SOCK_TRUSTED, NULL);
1358 kfree_skb(skb);
1359 }
1360 }
70ecce91 1361
249fa169
MH		 1362 /* Send event to monitor */
1363 skb = create_monitor_ctrl_open(sk);
1364 if (skb) {
1365 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1366 HCI_SOCK_TRUSTED, NULL);
1367 kfree_skb(skb);
1368 }
1369
f9207338
MH		 1370 hci_sock_set_flag(sk, HCI_MGMT_INDEX_EVENTS);
1371 hci_sock_set_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS);
5504c3a3
MH		 1372 hci_sock_set_flag(sk, HCI_MGMT_OPTION_EVENTS);
1373 hci_sock_set_flag(sk, HCI_MGMT_SETTING_EVENTS);
1374 hci_sock_set_flag(sk, HCI_MGMT_DEV_CLASS_EVENTS);
1375 hci_sock_set_flag(sk, HCI_MGMT_LOCAL_NAME_EVENTS);
f9207338 1376 }
801c1e8d 1377 break;
1da177e4
LT		 1378 }
1379
09572fca
LAD		 1380 /* Default MTU to HCI_MAX_FRAME_SIZE if not set */
1381 if (!hci_pi(sk)->mtu)
1382 hci_pi(sk)->mtu = HCI_MAX_FRAME_SIZE;
1383
1da177e4
LT		 1384 sk->sk_state = BT_BOUND;
1385
1386done:
1387 release_sock(sk);
1388 return err;
1389}
1390
8fc9ced3 1391static int hci_sock_getname(struct socket *sock, struct sockaddr *addr,
9b2c45d4 1392 int peer)
1da177e4 1393{
8528d3f7 1394 struct sockaddr_hci *haddr = (struct sockaddr_hci *)addr;
1da177e4 1395 struct sock *sk = sock->sk;
9d4b68b2
MH		 1396 struct hci_dev *hdev;
1397 int err = 0;
1da177e4
LT		 1398
1399 BT_DBG("sock %p sk %p", sock, sk);
1400
06f43cbc
MH		 1401 if (peer)
1402 return -EOPNOTSUPP;
1403
1da177e4
LT		 1404 lock_sock(sk);
1405
e0448092
TH		 1406 hdev = hci_hdev_from_sock(sk);
1407 if (IS_ERR(hdev)) {
1408 err = PTR_ERR(hdev);
9d4b68b2
MH		 1409 goto done;
1410 }
1411
1da177e4 1412 haddr->hci_family = AF_BLUETOOTH;
7b005bd3 1413 haddr->hci_dev = hdev->id;
9d4b68b2 1414 haddr->hci_channel= hci_pi(sk)->channel;
9b2c45d4 1415 err = sizeof(*haddr);
1da177e4 1416
9d4b68b2 1417done:
1da177e4 1418 release_sock(sk);
9d4b68b2 1419 return err;
1da177e4
LT		 1420}
1421
6039aa73
GP		 1422static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg,
1423 struct sk_buff *skb)
1da177e4 1424{
32929e1f 1425 __u8 mask = hci_pi(sk)->cmsg_mask;
1da177e4 1426
0d48d939
MH		 1427 if (mask & HCI_CMSG_DIR) {
1428 int incoming = bt_cb(skb)->incoming;
8fc9ced3
GP		 1429 put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming),
1430 &incoming);
0d48d939 1431 }
1da177e4 1432
a61bbcf2 1433 if (mask & HCI_CMSG_TSTAMP) {
f6e623a6 1434#ifdef CONFIG_COMPAT
13c6ee2a 1435 struct old_timeval32 ctv;
f6e623a6 1436#endif
13c6ee2a 1437 struct __kernel_old_timeval tv;
767c5eb5
MH		 1438 void *data;
1439 int len;
a61bbcf2
PM		 1440
1441 skb_get_timestamp(skb, &tv);
767c5eb5 1442
1da97f83
DM		 1443 data = &tv;
1444 len = sizeof(tv);
1445#ifdef CONFIG_COMPAT
da88cea1
L		 1446 if (!COMPAT_USE_64BIT_TIME &&
1447 (msg->msg_flags & MSG_CMSG_COMPAT)) {
767c5eb5
MH		 1448 ctv.tv_sec = tv.tv_sec;
1449 ctv.tv_usec = tv.tv_usec;
1450 data = &ctv;
1451 len = sizeof(ctv);
767c5eb5 1452 }
1da97f83 1453#endif
767c5eb5
MH		 1454
1455 put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data);
a61bbcf2 1456 }
1da177e4 1457}
8e87d142 1458
8528d3f7
MH		 1459static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg,
1460 size_t len, int flags)
1da177e4 1461{
1da177e4
LT		 1462 struct sock *sk = sock->sk;
1463 struct sk_buff *skb;
1464 int copied, err;
83871f8c 1465 unsigned int skblen;
1da177e4
LT		 1466
1467 BT_DBG("sock %p, sk %p", sock, sk);
1468
d94a6104 1469 if (flags & MSG_OOB)
1da177e4
LT		 1470 return -EOPNOTSUPP;
1471
ac714949
MH		 1472 if (hci_pi(sk)->channel == HCI_CHANNEL_LOGGING)
1473 return -EOPNOTSUPP;
1474
1da177e4
LT		 1475 if (sk->sk_state == BT_CLOSED)
1476 return 0;
1477
f4b41f06 1478 skb = skb_recv_datagram(sk, flags, &err);
70f23020 1479 if (!skb)
1da177e4
LT		 1480 return err;
1481
83871f8c 1482 skblen = skb->len;
1da177e4
LT		 1483 copied = skb->len;
1484 if (len < copied) {
1485 msg->msg_flags |= MSG_TRUNC;
1486 copied = len;
1487 }
1488
badff6d0 1489 skb_reset_transport_header(skb);
51f3d02b 1490 err = skb_copy_datagram_msg(skb, 0, msg, copied);
1da177e4 1491
3a208627
MH		 1492 switch (hci_pi(sk)->channel) {
1493 case HCI_CHANNEL_RAW:
1494 hci_sock_cmsg(sk, msg, skb);
1495 break;
23500189 1496 case HCI_CHANNEL_USER:
cd82e61c
MH		 1497 case HCI_CHANNEL_MONITOR:
1498 sock_recv_timestamp(msg, sk, skb);
1499 break;
801c1e8d
JH		 1500 default:
1501 if (hci_mgmt_chan_find(hci_pi(sk)->channel))
1502 sock_recv_timestamp(msg, sk, skb);
1503 break;
3a208627 1504 }
1da177e4
LT		 1505
1506 skb_free_datagram(sk, skb);
1507
4f34228b 1508 if (flags & MSG_TRUNC)
83871f8c
DK		 1509 copied = skblen;
1510
1da177e4
LT		 1511 return err ? : copied;
1512}
1513
64ba2eb3
LAD		 1514static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk,
1515 struct sk_buff *skb)
fa4335d7 1516{
fa4335d7
JH		 1517 u8 *cp;
1518 struct mgmt_hdr *hdr;
1519 u16 opcode, index, len;
1520 struct hci_dev *hdev = NULL;
1521 const struct hci_mgmt_handler *handler;
1522 bool var_len, no_hdev;
1523 int err;
1524
64ba2eb3 1525 BT_DBG("got %d bytes", skb->len);
fa4335d7 1526
64ba2eb3 1527 if (skb->len < sizeof(*hdr))
fa4335d7
JH		 1528 return -EINVAL;
1529
64ba2eb3 1530 hdr = (void *)skb->data;
fa4335d7
JH		 1531 opcode = __le16_to_cpu(hdr->opcode);
1532 index = __le16_to_cpu(hdr->index);
1533 len = __le16_to_cpu(hdr->len);
1534
64ba2eb3 1535 if (len != skb->len - sizeof(*hdr)) {
fa4335d7
JH		 1536 err = -EINVAL;
1537 goto done;
1538 }
1539
38ceaa00 1540 if (chan->channel == HCI_CHANNEL_CONTROL) {
64ba2eb3 1541 struct sk_buff *cmd;
38ceaa00
MH		 1542
1543 /* Send event to monitor */
64ba2eb3
LAD		 1544 cmd = create_monitor_ctrl_command(sk, index, opcode, len,
1545 skb->data + sizeof(*hdr));
1546 if (cmd) {
1547 hci_send_to_channel(HCI_CHANNEL_MONITOR, cmd,
38ceaa00 1548 HCI_SOCK_TRUSTED, NULL);
64ba2eb3 1549 kfree_skb(cmd);
38ceaa00
MH		 1550 }
1551 }
1552
fa4335d7
JH		 1553 if (opcode >= chan->handler_count ||
1554 chan->handlers[opcode].func == NULL) {
1555 BT_DBG("Unknown op %u", opcode);
1556 err = mgmt_cmd_status(sk, index, opcode,
1557 MGMT_STATUS_UNKNOWN_COMMAND);
1558 goto done;
1559 }
1560
1561 handler = &chan->handlers[opcode];
1562
1563 if (!hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) &&
1564 !(handler->flags & HCI_MGMT_UNTRUSTED)) {
1565 err = mgmt_cmd_status(sk, index, opcode,
1566 MGMT_STATUS_PERMISSION_DENIED);
1567 goto done;
1568 }
1569
1570 if (index != MGMT_INDEX_NONE) {
1571 hdev = hci_dev_get(index);
1572 if (!hdev) {
1573 err = mgmt_cmd_status(sk, index, opcode,
1574 MGMT_STATUS_INVALID_INDEX);
1575 goto done;
1576 }
1577
1578 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
1579 hci_dev_test_flag(hdev, HCI_CONFIG) ||
1580 hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1581 err = mgmt_cmd_status(sk, index, opcode,
1582 MGMT_STATUS_INVALID_INDEX);
1583 goto done;
1584 }
1585
1586 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1587 !(handler->flags & HCI_MGMT_UNCONFIGURED)) {
1588 err = mgmt_cmd_status(sk, index, opcode,
1589 MGMT_STATUS_INVALID_INDEX);
1590 goto done;
1591 }
1592 }
1593
d5cc6626
MH		 1594 if (!(handler->flags & HCI_MGMT_HDEV_OPTIONAL)) {
1595 no_hdev = (handler->flags & HCI_MGMT_NO_HDEV);
1596 if (no_hdev != !hdev) {
1597 err = mgmt_cmd_status(sk, index, opcode,
1598 MGMT_STATUS_INVALID_INDEX);
1599 goto done;
1600 }
fa4335d7
JH		 1601 }
1602
1603 var_len = (handler->flags & HCI_MGMT_VAR_LEN);
1604 if ((var_len && len < handler->data_len) ||
1605 (!var_len && len != handler->data_len)) {
1606 err = mgmt_cmd_status(sk, index, opcode,
1607 MGMT_STATUS_INVALID_PARAMS);
1608 goto done;
1609 }
1610
1611 if (hdev && chan->hdev_init)
1612 chan->hdev_init(sk, hdev);
1613
64ba2eb3 1614 cp = skb->data + sizeof(*hdr);
fa4335d7
JH		 1615
1616 err = handler->func(sk, hdev, cp, len);
1617 if (err < 0)
1618 goto done;
1619
64ba2eb3 1620 err = skb->len;
fa4335d7
JH		 1621
1622done:
1623 if (hdev)
1624 hci_dev_put(hdev);
1625
fa4335d7
JH		 1626 return err;
1627}
1628
64ba2eb3
LAD		 1629static int hci_logging_frame(struct sock *sk, struct sk_buff *skb,
1630 unsigned int flags)
ac714949
MH		 1631{
1632 struct hci_mon_hdr *hdr;
ac714949
MH		 1633 struct hci_dev *hdev;
1634 u16 index;
1635 int err;
1636
1637 /* The logging frame consists at minimum of the standard header,
1638 * the priority byte, the ident length byte and at least one string
1639 * terminator NUL byte. Anything shorter are invalid packets.
1640 */
64ba2eb3 1641 if (skb->len < sizeof(*hdr) + 3)
ac714949
MH		 1642 return -EINVAL;
1643
ac714949
MH		 1644 hdr = (void *)skb->data;
1645
64ba2eb3
LAD		 1646 if (__le16_to_cpu(hdr->len) != skb->len - sizeof(*hdr))
1647 return -EINVAL;
ac714949
MH		 1648
1649 if (__le16_to_cpu(hdr->opcode) == 0x0000) {
1650 __u8 priority = skb->data[sizeof(*hdr)];
1651 __u8 ident_len = skb->data[sizeof(*hdr) + 1];
1652
1653 /* Only the priorities 0-7 are valid and with that any other
1654 * value results in an invalid packet.
1655 *
1656 * The priority byte is followed by an ident length byte and
1657 * the NUL terminated ident string. Check that the ident
1658 * length is not overflowing the packet and also that the
1659 * ident string itself is NUL terminated. In case the ident
1660 * length is zero, the length value actually doubles as NUL
1661 * terminator identifier.
1662 *
1663 * The message follows the ident string (if present) and
1664 * must be NUL terminated. Otherwise it is not a valid packet.
1665 */
64ba2eb3
LAD		 1666 if (priority > 7 || skb->data[skb->len - 1] != 0x00 ||
1667 ident_len > skb->len - sizeof(*hdr) - 3 ||
1668 skb->data[sizeof(*hdr) + ident_len + 1] != 0x00)
1669 return -EINVAL;
ac714949 1670 } else {
64ba2eb3 1671 return -EINVAL;
ac714949
MH		 1672 }
1673
1674 index = __le16_to_cpu(hdr->index);
1675
1676 if (index != MGMT_INDEX_NONE) {
1677 hdev = hci_dev_get(index);
64ba2eb3
LAD		 1678 if (!hdev)
1679 return -ENODEV;
ac714949
MH		 1680 } else {
1681 hdev = NULL;
1682 }
1683
1684 hdr->opcode = cpu_to_le16(HCI_MON_USER_LOGGING);
1685
1686 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, HCI_SOCK_TRUSTED, NULL);
64ba2eb3 1687 err = skb->len;
ac714949
MH		 1688
1689 if (hdev)
1690 hci_dev_put(hdev);
1691
ac714949
MH		 1692 return err;
1693}
1694
1b784140
YX		 1695static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg,
1696 size_t len)
1da177e4
LT		 1697{
1698 struct sock *sk = sock->sk;
801c1e8d 1699 struct hci_mgmt_chan *chan;
1da177e4
LT		 1700 struct hci_dev *hdev;
1701 struct sk_buff *skb;
1702 int err;
0b59e272 1703 const unsigned int flags = msg->msg_flags;
1da177e4
LT		 1704
1705 BT_DBG("sock %p sk %p", sock, sk);
1706
0b59e272 1707 if (flags & MSG_OOB)
1da177e4
LT		 1708 return -EOPNOTSUPP;
1709
0b59e272 1710 if (flags & ~(MSG_DONTWAIT | MSG_NOSIGNAL | MSG_ERRQUEUE | MSG_CMSG_COMPAT))
1da177e4
LT		 1711 return -EINVAL;
1712
09572fca 1713 if (len < 4 || len > hci_pi(sk)->mtu)
1da177e4
LT		 1714 return -EINVAL;
1715
64ba2eb3
LAD		 1716 skb = bt_skb_sendmsg(sk, msg, len, len, 0, 0);
1717 if (IS_ERR(skb))
1718 return PTR_ERR(skb);
0b59e272 1719
1da177e4
LT		 1720 lock_sock(sk);
1721
0381101f
JH		 1722 switch (hci_pi(sk)->channel) {
1723 case HCI_CHANNEL_RAW:
23500189 1724 case HCI_CHANNEL_USER:
0381101f 1725 break;
cd82e61c
MH		 1726 case HCI_CHANNEL_MONITOR:
1727 err = -EOPNOTSUPP;
64ba2eb3 1728 goto drop;
ac714949 1729 case HCI_CHANNEL_LOGGING:
64ba2eb3
LAD		 1730 err = hci_logging_frame(sk, skb, flags);
1731 goto drop;
0381101f 1732 default:
801c1e8d
JH		 1733 mutex_lock(&mgmt_chan_list_lock);
1734 chan = __hci_mgmt_chan_find(hci_pi(sk)->channel);
1735 if (chan)
64ba2eb3 1736 err = hci_mgmt_cmd(chan, sk, skb);
801c1e8d
JH		 1737 else
1738 err = -EINVAL;
1739
1740 mutex_unlock(&mgmt_chan_list_lock);
64ba2eb3 1741 goto drop;
0381101f
JH		 1742 }
1743
e0448092
TH		 1744 hdev = hci_hdev_from_sock(sk);
1745 if (IS_ERR(hdev)) {
1746 err = PTR_ERR(hdev);
64ba2eb3 1747 goto drop;
1da177e4
LT		 1748 }
1749
7e21addc
MH		 1750 if (!test_bit(HCI_UP, &hdev->flags)) {
1751 err = -ENETDOWN;
64ba2eb3 1752 goto drop;
7e21addc
MH		 1753 }
1754
8528d3f7 1755 hci_skb_pkt_type(skb) = skb->data[0];
1da177e4 1756 skb_pull(skb, 1);
1da177e4 1757
1bc5ad16
MH		 1758 if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
1759 /* No permission check is needed for user channel
1760 * since that gets enforced when binding the socket.
1761 *
1762 * However check that the packet type is valid.
1763 */
d79f34e3
MH		 1764 if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT &&
1765 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
cc974003
MH		 1766 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
1767 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
1bc5ad16
MH		 1768 err = -EINVAL;
1769 goto drop;
1770 }
1771
1772 skb_queue_tail(&hdev->raw_q, skb);
1773 queue_work(hdev->workqueue, &hdev->tx_work);
d79f34e3 1774 } else if (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT) {
83985319 1775 u16 opcode = get_unaligned_le16(skb->data);
1da177e4
LT		 1776 u16 ogf = hci_opcode_ogf(opcode);
1777 u16 ocf = hci_opcode_ocf(opcode);
1778
1779 if (((ogf > HCI_SFLT_MAX_OGF) ||
3bb3c755
GP		 1780 !hci_test_bit(ocf & HCI_FLT_OCF_BITS,
1781 &hci_sec_filter.ocf_mask[ogf])) &&
1782 !capable(CAP_NET_RAW)) {
1da177e4
LT		 1783 err = -EPERM;
1784 goto drop;
1785 }
1786
1982162b
MH		 1787 /* Since the opcode has already been extracted here, store
1788 * a copy of the value for later use by the drivers.
1789 */
1790 hci_skb_opcode(skb) = opcode;
1791
fee746b0 1792 if (ogf == 0x3f) {
1da177e4 1793 skb_queue_tail(&hdev->raw_q, skb);
3eff45ea 1794 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 1795 } else {
49c922bb 1796 /* Stand-alone HCI commands must be flagged as
11714b3d
JH		 1797 * single-command requests.
1798 */
44d27137 1799 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
11714b3d 1800
1da177e4 1801 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 1802 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 1803 }
1804 } else {
1805 if (!capable(CAP_NET_RAW)) {
1806 err = -EPERM;
1807 goto drop;
1808 }
1809
d79f34e3 1810 if (hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
cc974003
MH		 1811 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
1812 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
bb77543e
MH		 1813 err = -EINVAL;
1814 goto drop;
1815 }
1816
1da177e4 1817 skb_queue_tail(&hdev->raw_q, skb);
3eff45ea 1818 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 1819 }
1820
1821 err = len;
1822
1823done:
1824 release_sock(sk);
1825 return err;
1826
1827drop:
1828 kfree_skb(skb);
1829 goto done;
1830}
1831
09572fca
LAD		 1832static int hci_sock_setsockopt_old(struct socket *sock, int level, int optname,
1833 sockptr_t optval, unsigned int len)
1da177e4
LT		 1834{
1835 struct hci_ufilter uf = { .opcode = 0 };
1836 struct sock *sk = sock->sk;
1837 int err = 0, opt = 0;
1838
1839 BT_DBG("sk %p, opt %d", sk, optname);
1840
1841 lock_sock(sk);
1842
2f39cdb7 1843 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
c2371e80 1844 err = -EBADFD;
2f39cdb7
MH		 1845 goto done;
1846 }
1847
1da177e4
LT		 1848 switch (optname) {
1849 case HCI_DATA_DIR:
a7b75c5a 1850 if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
1da177e4
LT		 1851 err = -EFAULT;
1852 break;
1853 }
1854
1855 if (opt)
1856 hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR;
1857 else
1858 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR;
1859 break;
1860
1861 case HCI_TIME_STAMP:
a7b75c5a 1862 if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
1da177e4
LT		 1863 err = -EFAULT;
1864 break;
1865 }
1866
1867 if (opt)
1868 hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP;
1869 else
1870 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP;
1871 break;
1872
1873 case HCI_FILTER:
0878b666
MH		 1874 {
1875 struct hci_filter *f = &hci_pi(sk)->filter;
1876
1877 uf.type_mask = f->type_mask;
1878 uf.opcode = f->opcode;
1879 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
1880 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
1881 }
1882
1da177e4 1883 len = min_t(unsigned int, len, sizeof(uf));
a7b75c5a 1884 if (copy_from_sockptr(&uf, optval, len)) {
1da177e4
LT		 1885 err = -EFAULT;
1886 break;
1887 }
1888
1889 if (!capable(CAP_NET_RAW)) {
1890 uf.type_mask &= hci_sec_filter.type_mask;
1891 uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0);
1892 uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1);
1893 }
1894
1895 {
1896 struct hci_filter *f = &hci_pi(sk)->filter;
1897
1898 f->type_mask = uf.type_mask;
1899 f->opcode = uf.opcode;
1900 *((u32 *) f->event_mask + 0) = uf.event_mask[0];
1901 *((u32 *) f->event_mask + 1) = uf.event_mask[1];
1902 }
8e87d142 1903 break;
1da177e4
LT		 1904
1905 default:
1906 err = -ENOPROTOOPT;
1907 break;
1908 }
1909
2f39cdb7 1910done:
1da177e4
LT		 1911 release_sock(sk);
1912 return err;
1913}
1914
09572fca
LAD		 1915static int hci_sock_setsockopt(struct socket *sock, int level, int optname,
1916 sockptr_t optval, unsigned int len)
1da177e4 1917{
1da177e4 1918 struct sock *sk = sock->sk;
b9f9dbad
DC		 1919 int err = 0;
1920 u16 opt;
cedc5469
MH		 1921
1922 BT_DBG("sk %p, opt %d", sk, optname);
1da177e4 1923
09572fca
LAD		 1924 if (level == SOL_HCI)
1925 return hci_sock_setsockopt_old(sock, level, optname, optval,
1926 len);
1927
1928 if (level != SOL_BLUETOOTH)
47b0f573
MH		 1929 return -ENOPROTOOPT;
1930
09572fca
LAD		 1931 lock_sock(sk);
1932
1933 switch (optname) {
1934 case BT_SNDMTU:
1935 case BT_RCVMTU:
1936 switch (hci_pi(sk)->channel) {
1937 /* Don't allow changing MTU for channels that are meant for HCI
1938 * traffic only.
1939 */
1940 case HCI_CHANNEL_RAW:
1941 case HCI_CHANNEL_USER:
1942 err = -ENOPROTOOPT;
1943 goto done;
1944 }
1945
b9f9dbad 1946 if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
09572fca
LAD		 1947 err = -EFAULT;
1948 break;
1949 }
1950
1951 hci_pi(sk)->mtu = opt;
1952 break;
1953
1954 default:
1955 err = -ENOPROTOOPT;
1956 break;
1957 }
1958
1959done:
1960 release_sock(sk);
1961 return err;
1962}
1963
1964static int hci_sock_getsockopt_old(struct socket *sock, int level, int optname,
1965 char __user *optval, int __user *optlen)
1966{
1967 struct hci_ufilter uf;
1968 struct sock *sk = sock->sk;
1969 int len, opt, err = 0;
1970
1971 BT_DBG("sk %p, opt %d", sk, optname);
1972
1da177e4
LT		 1973 if (get_user(len, optlen))
1974 return -EFAULT;
1975
cedc5469
MH		 1976 lock_sock(sk);
1977
1978 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
c2371e80 1979 err = -EBADFD;
cedc5469
MH		 1980 goto done;
1981 }
1982
1da177e4
LT		 1983 switch (optname) {
1984 case HCI_DATA_DIR:
1985 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR)
1986 opt = 1;
8e87d142 1987 else
1da177e4
LT		 1988 opt = 0;
1989
1990 if (put_user(opt, optval))
cedc5469 1991 err = -EFAULT;
1da177e4
LT		 1992 break;
1993
1994 case HCI_TIME_STAMP:
1995 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP)
1996 opt = 1;
8e87d142 1997 else
1da177e4
LT		 1998 opt = 0;
1999
2000 if (put_user(opt, optval))
cedc5469 2001 err = -EFAULT;
1da177e4
LT		 2002 break;
2003
2004 case HCI_FILTER:
2005 {
2006 struct hci_filter *f = &hci_pi(sk)->filter;
2007
e15ca9a0 2008 memset(&uf, 0, sizeof(uf));
1da177e4
LT		 2009 uf.type_mask = f->type_mask;
2010 uf.opcode = f->opcode;
2011 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
2012 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
2013 }
2014
2015 len = min_t(unsigned int, len, sizeof(uf));
2016 if (copy_to_user(optval, &uf, len))
cedc5469 2017 err = -EFAULT;
1da177e4
LT		 2018 break;
2019
2020 default:
cedc5469 2021 err = -ENOPROTOOPT;
1da177e4
LT		 2022 break;
2023 }
2024
cedc5469
MH		 2025done:
2026 release_sock(sk);
2027 return err;
1da177e4
LT		 2028}
2029
09572fca
LAD		 2030static int hci_sock_getsockopt(struct socket *sock, int level, int optname,
2031 char __user *optval, int __user *optlen)
2032{
2033 struct sock *sk = sock->sk;
2034 int err = 0;
2035
2036 BT_DBG("sk %p, opt %d", sk, optname);
2037
2038 if (level == SOL_HCI)
2039 return hci_sock_getsockopt_old(sock, level, optname, optval,
2040 optlen);
2041
2042 if (level != SOL_BLUETOOTH)
2043 return -ENOPROTOOPT;
2044
2045 lock_sock(sk);
2046
2047 switch (optname) {
2048 case BT_SNDMTU:
2049 case BT_RCVMTU:
2050 if (put_user(hci_pi(sk)->mtu, (u16 __user *)optval))
2051 err = -EFAULT;
2052 break;
2053
2054 default:
2055 err = -ENOPROTOOPT;
2056 break;
2057 }
2058
2059 release_sock(sk);
2060 return err;
2061}
2062
709fca50
NDP		 2063static void hci_sock_destruct(struct sock *sk)
2064{
b338d917 2065 mgmt_cleanup(sk);
709fca50
NDP		 2066 skb_queue_purge(&sk->sk_receive_queue);
2067 skb_queue_purge(&sk->sk_write_queue);
2068}
2069
90ddc4f0 2070static const struct proto_ops hci_sock_ops = {
1da177e4
LT		 2071 .family = PF_BLUETOOTH,
2072 .owner = THIS_MODULE,
2073 .release = hci_sock_release,
2074 .bind = hci_sock_bind,
2075 .getname = hci_sock_getname,
2076 .sendmsg = hci_sock_sendmsg,
2077 .recvmsg = hci_sock_recvmsg,
2078 .ioctl = hci_sock_ioctl,
7a6038b3
AB		 2079#ifdef CONFIG_COMPAT
2080 .compat_ioctl = hci_sock_compat_ioctl,
2081#endif
a11e1d43 2082 .poll = datagram_poll,
1da177e4
LT		 2083 .listen = sock_no_listen,
2084 .shutdown = sock_no_shutdown,
2085 .setsockopt = hci_sock_setsockopt,
2086 .getsockopt = hci_sock_getsockopt,
2087 .connect = sock_no_connect,
2088 .socketpair = sock_no_socketpair,
2089 .accept = sock_no_accept,
2090 .mmap = sock_no_mmap
2091};
2092
2093static struct proto hci_sk_proto = {
2094 .name = "HCI",
2095 .owner = THIS_MODULE,
2096 .obj_size = sizeof(struct hci_pinfo)
2097};
2098
3f378b68
EP		 2099static int hci_sock_create(struct net *net, struct socket *sock, int protocol,
2100 int kern)
1da177e4
LT		 2101{
2102 struct sock *sk;
2103
2104 BT_DBG("sock %p", sock);
2105
2106 if (sock->type != SOCK_RAW)
2107 return -ESOCKTNOSUPPORT;
2108
2109 sock->ops = &hci_sock_ops;
2110
11aa9c28 2111 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto, kern);
1da177e4
LT		 2112 if (!sk)
2113 return -ENOMEM;
2114
2115 sock_init_data(sock, sk);
2116
2117 sock_reset_flag(sk, SOCK_ZAPPED);
2118
2119 sk->sk_protocol = protocol;
2120
2121 sock->state = SS_UNCONNECTED;
2122 sk->sk_state = BT_OPEN;
709fca50 2123 sk->sk_destruct = hci_sock_destruct;
1da177e4
LT		 2124
2125 bt_sock_link(&hci_sk_list, sk);
2126 return 0;
2127}
2128
ec1b4cf7 2129static const struct net_proto_family hci_sock_family_ops = {
1da177e4
LT		 2130 .family = PF_BLUETOOTH,
2131 .owner = THIS_MODULE,
2132 .create = hci_sock_create,
2133};
2134
1da177e4
LT		 2135int __init hci_sock_init(void)
2136{
2137 int err;
2138
b0a8e282
MH		 2139 BUILD_BUG_ON(sizeof(struct sockaddr_hci) > sizeof(struct sockaddr));
2140
1da177e4
LT		 2141 err = proto_register(&hci_sk_proto, 0);
2142 if (err < 0)
2143 return err;
2144
2145 err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops);
f7c86637
MY		 2146 if (err < 0) {
2147 BT_ERR("HCI socket registration failed");
1da177e4 2148 goto error;
f7c86637
MY		 2149 }
2150
b0316615 2151 err = bt_procfs_init(&init_net, "hci", &hci_sk_list, NULL);
f7c86637
MY		 2152 if (err < 0) {
2153 BT_ERR("Failed to create HCI proc file");
2154 bt_sock_unregister(BTPROTO_HCI);
2155 goto error;
2156 }
1da177e4 2157
1da177e4
LT		 2158 BT_INFO("HCI socket layer initialized");
2159
2160 return 0;
2161
2162error:
1da177e4
LT		 2163 proto_unregister(&hci_sk_proto);
2164 return err;
2165}
2166
b7440a14 2167void hci_sock_cleanup(void)
1da177e4 2168{
f7c86637 2169 bt_procfs_cleanup(&init_net, "hci");
5e9d7f86 2170 bt_sock_unregister(BTPROTO_HCI);
1da177e4 2171 proto_unregister(&hci_sk_proto);
1da177e4 2172}
Linux 6.x block layer and io_uring tree(s)