Commit | Line | Data |
---|---|---|
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. */ | |
26 | ||
1da177e4 LT |
27 | #include <linux/module.h> |
28 | ||
29 | #include <linux/types.h> | |
4fc268d2 | 30 | #include <linux/capability.h> |
1da177e4 LT |
31 | #include <linux/errno.h> |
32 | #include <linux/kernel.h> | |
1da177e4 LT |
33 | #include <linux/slab.h> |
34 | #include <linux/poll.h> | |
35 | #include <linux/fcntl.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/skbuff.h> | |
38 | #include <linux/workqueue.h> | |
39 | #include <linux/interrupt.h> | |
767c5eb5 | 40 | #include <linux/compat.h> |
1da177e4 LT |
41 | #include <linux/socket.h> |
42 | #include <linux/ioctl.h> | |
43 | #include <net/sock.h> | |
44 | ||
45 | #include <asm/system.h> | |
70f23020 | 46 | #include <linux/uaccess.h> |
1da177e4 LT |
47 | #include <asm/unaligned.h> |
48 | ||
49 | #include <net/bluetooth/bluetooth.h> | |
50 | #include <net/bluetooth/hci_core.h> | |
51 | ||
eb939922 | 52 | static bool enable_mgmt; |
0381101f | 53 | |
1da177e4 LT |
54 | /* ----- HCI socket interface ----- */ |
55 | ||
56 | static inline int hci_test_bit(int nr, void *addr) | |
57 | { | |
58 | return *((__u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31)); | |
59 | } | |
60 | ||
61 | /* Security filter */ | |
62 | static struct hci_sec_filter hci_sec_filter = { | |
63 | /* Packet types */ | |
64 | 0x10, | |
65 | /* Events */ | |
dd7f5527 | 66 | { 0x1000d9fe, 0x0000b00c }, |
1da177e4 LT |
67 | /* Commands */ |
68 | { | |
69 | { 0x0 }, | |
70 | /* OGF_LINK_CTL */ | |
7c631a67 | 71 | { 0xbe000006, 0x00000001, 0x00000000, 0x00 }, |
1da177e4 | 72 | /* OGF_LINK_POLICY */ |
7c631a67 | 73 | { 0x00005200, 0x00000000, 0x00000000, 0x00 }, |
1da177e4 | 74 | /* OGF_HOST_CTL */ |
7c631a67 | 75 | { 0xaab00200, 0x2b402aaa, 0x05220154, 0x00 }, |
1da177e4 | 76 | /* OGF_INFO_PARAM */ |
7c631a67 | 77 | { 0x000002be, 0x00000000, 0x00000000, 0x00 }, |
1da177e4 | 78 | /* OGF_STATUS_PARAM */ |
7c631a67 | 79 | { 0x000000ea, 0x00000000, 0x00000000, 0x00 } |
1da177e4 LT |
80 | } |
81 | }; | |
82 | ||
83 | static struct bt_sock_list hci_sk_list = { | |
d5fb2962 | 84 | .lock = __RW_LOCK_UNLOCKED(hci_sk_list.lock) |
1da177e4 LT |
85 | }; |
86 | ||
87 | /* Send frame to RAW socket */ | |
470fe1b5 | 88 | void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb) |
1da177e4 LT |
89 | { |
90 | struct sock *sk; | |
91 | struct hlist_node *node; | |
92 | ||
93 | BT_DBG("hdev %p len %d", hdev, skb->len); | |
94 | ||
95 | read_lock(&hci_sk_list.lock); | |
470fe1b5 | 96 | |
1da177e4 LT |
97 | sk_for_each(sk, node, &hci_sk_list.head) { |
98 | struct hci_filter *flt; | |
99 | struct sk_buff *nskb; | |
100 | ||
101 | if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev) | |
102 | continue; | |
103 | ||
104 | /* Don't send frame to the socket it came from */ | |
105 | if (skb->sk == sk) | |
106 | continue; | |
107 | ||
470fe1b5 | 108 | if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) |
a40c406c JH |
109 | continue; |
110 | ||
1da177e4 LT |
111 | /* Apply filter */ |
112 | flt = &hci_pi(sk)->filter; | |
113 | ||
0d48d939 MH |
114 | if (!test_bit((bt_cb(skb)->pkt_type == HCI_VENDOR_PKT) ? |
115 | 0 : (bt_cb(skb)->pkt_type & HCI_FLT_TYPE_BITS), &flt->type_mask)) | |
1da177e4 LT |
116 | continue; |
117 | ||
0d48d939 | 118 | if (bt_cb(skb)->pkt_type == HCI_EVENT_PKT) { |
1da177e4 LT |
119 | register int evt = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS); |
120 | ||
121 | if (!hci_test_bit(evt, &flt->event_mask)) | |
122 | continue; | |
123 | ||
4498c80d DM |
124 | if (flt->opcode && |
125 | ((evt == HCI_EV_CMD_COMPLETE && | |
126 | flt->opcode != | |
905f3ed6 | 127 | get_unaligned((__le16 *)(skb->data + 3))) || |
4498c80d DM |
128 | (evt == HCI_EV_CMD_STATUS && |
129 | flt->opcode != | |
905f3ed6 | 130 | get_unaligned((__le16 *)(skb->data + 4))))) |
1da177e4 LT |
131 | continue; |
132 | } | |
133 | ||
70f23020 AE |
134 | nskb = skb_clone(skb, GFP_ATOMIC); |
135 | if (!nskb) | |
1da177e4 LT |
136 | continue; |
137 | ||
138 | /* Put type byte before the data */ | |
470fe1b5 MH |
139 | memcpy(skb_push(nskb, 1), &bt_cb(nskb)->pkt_type, 1); |
140 | ||
141 | if (sock_queue_rcv_skb(sk, nskb)) | |
142 | kfree_skb(nskb); | |
143 | } | |
144 | ||
145 | read_unlock(&hci_sk_list.lock); | |
146 | } | |
147 | ||
148 | /* Send frame to control socket */ | |
149 | void hci_send_to_control(struct sk_buff *skb, struct sock *skip_sk) | |
150 | { | |
151 | struct sock *sk; | |
152 | struct hlist_node *node; | |
153 | ||
154 | BT_DBG("len %d", skb->len); | |
155 | ||
156 | read_lock(&hci_sk_list.lock); | |
157 | ||
158 | sk_for_each(sk, node, &hci_sk_list.head) { | |
159 | struct sk_buff *nskb; | |
160 | ||
161 | /* Skip the original socket */ | |
162 | if (sk == skip_sk) | |
163 | continue; | |
164 | ||
165 | if (sk->sk_state != BT_BOUND) | |
166 | continue; | |
167 | ||
168 | if (hci_pi(sk)->channel != HCI_CHANNEL_CONTROL) | |
169 | continue; | |
170 | ||
171 | nskb = skb_clone(skb, GFP_ATOMIC); | |
172 | if (!nskb) | |
173 | continue; | |
1da177e4 LT |
174 | |
175 | if (sock_queue_rcv_skb(sk, nskb)) | |
176 | kfree_skb(nskb); | |
177 | } | |
470fe1b5 | 178 | |
1da177e4 LT |
179 | read_unlock(&hci_sk_list.lock); |
180 | } | |
181 | ||
182 | static int hci_sock_release(struct socket *sock) | |
183 | { | |
184 | struct sock *sk = sock->sk; | |
7b005bd3 | 185 | struct hci_dev *hdev; |
1da177e4 LT |
186 | |
187 | BT_DBG("sock %p sk %p", sock, sk); | |
188 | ||
189 | if (!sk) | |
190 | return 0; | |
191 | ||
7b005bd3 MH |
192 | hdev = hci_pi(sk)->hdev; |
193 | ||
1da177e4 LT |
194 | bt_sock_unlink(&hci_sk_list, sk); |
195 | ||
196 | if (hdev) { | |
197 | atomic_dec(&hdev->promisc); | |
198 | hci_dev_put(hdev); | |
199 | } | |
200 | ||
201 | sock_orphan(sk); | |
202 | ||
203 | skb_queue_purge(&sk->sk_receive_queue); | |
204 | skb_queue_purge(&sk->sk_write_queue); | |
205 | ||
206 | sock_put(sk); | |
207 | return 0; | |
208 | } | |
209 | ||
b2a66aad | 210 | static int hci_sock_blacklist_add(struct hci_dev *hdev, void __user *arg) |
f0358568 JH |
211 | { |
212 | bdaddr_t bdaddr; | |
5e762444 | 213 | int err; |
f0358568 JH |
214 | |
215 | if (copy_from_user(&bdaddr, arg, sizeof(bdaddr))) | |
216 | return -EFAULT; | |
217 | ||
09fd0de5 | 218 | hci_dev_lock(hdev); |
5e762444 | 219 | |
88c1fe4b | 220 | err = hci_blacklist_add(hdev, &bdaddr, 0); |
5e762444 | 221 | |
09fd0de5 | 222 | hci_dev_unlock(hdev); |
5e762444 AJ |
223 | |
224 | return err; | |
f0358568 JH |
225 | } |
226 | ||
b2a66aad | 227 | static int hci_sock_blacklist_del(struct hci_dev *hdev, void __user *arg) |
f0358568 JH |
228 | { |
229 | bdaddr_t bdaddr; | |
5e762444 | 230 | int err; |
f0358568 JH |
231 | |
232 | if (copy_from_user(&bdaddr, arg, sizeof(bdaddr))) | |
233 | return -EFAULT; | |
234 | ||
09fd0de5 | 235 | hci_dev_lock(hdev); |
5e762444 | 236 | |
88c1fe4b | 237 | err = hci_blacklist_del(hdev, &bdaddr, 0); |
5e762444 | 238 | |
09fd0de5 | 239 | hci_dev_unlock(hdev); |
5e762444 AJ |
240 | |
241 | return err; | |
f0358568 JH |
242 | } |
243 | ||
8e87d142 | 244 | /* Ioctls that require bound socket */ |
1da177e4 LT |
245 | static inline int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) |
246 | { | |
247 | struct hci_dev *hdev = hci_pi(sk)->hdev; | |
248 | ||
249 | if (!hdev) | |
250 | return -EBADFD; | |
251 | ||
252 | switch (cmd) { | |
253 | case HCISETRAW: | |
254 | if (!capable(CAP_NET_ADMIN)) | |
255 | return -EACCES; | |
256 | ||
257 | if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) | |
258 | return -EPERM; | |
259 | ||
260 | if (arg) | |
261 | set_bit(HCI_RAW, &hdev->flags); | |
262 | else | |
263 | clear_bit(HCI_RAW, &hdev->flags); | |
264 | ||
265 | return 0; | |
266 | ||
1da177e4 | 267 | case HCIGETCONNINFO: |
40be492f MH |
268 | return hci_get_conn_info(hdev, (void __user *) arg); |
269 | ||
270 | case HCIGETAUTHINFO: | |
271 | return hci_get_auth_info(hdev, (void __user *) arg); | |
1da177e4 | 272 | |
f0358568 JH |
273 | case HCIBLOCKADDR: |
274 | if (!capable(CAP_NET_ADMIN)) | |
275 | return -EACCES; | |
b2a66aad | 276 | return hci_sock_blacklist_add(hdev, (void __user *) arg); |
f0358568 JH |
277 | |
278 | case HCIUNBLOCKADDR: | |
279 | if (!capable(CAP_NET_ADMIN)) | |
280 | return -EACCES; | |
b2a66aad | 281 | return hci_sock_blacklist_del(hdev, (void __user *) arg); |
f0358568 | 282 | |
1da177e4 LT |
283 | default: |
284 | if (hdev->ioctl) | |
285 | return hdev->ioctl(hdev, cmd, arg); | |
286 | return -EINVAL; | |
287 | } | |
288 | } | |
289 | ||
290 | static int hci_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
291 | { | |
292 | struct sock *sk = sock->sk; | |
40be492f | 293 | void __user *argp = (void __user *) arg; |
1da177e4 LT |
294 | int err; |
295 | ||
296 | BT_DBG("cmd %x arg %lx", cmd, arg); | |
297 | ||
298 | switch (cmd) { | |
299 | case HCIGETDEVLIST: | |
300 | return hci_get_dev_list(argp); | |
301 | ||
302 | case HCIGETDEVINFO: | |
303 | return hci_get_dev_info(argp); | |
304 | ||
305 | case HCIGETCONNLIST: | |
306 | return hci_get_conn_list(argp); | |
307 | ||
308 | case HCIDEVUP: | |
309 | if (!capable(CAP_NET_ADMIN)) | |
310 | return -EACCES; | |
311 | return hci_dev_open(arg); | |
312 | ||
313 | case HCIDEVDOWN: | |
314 | if (!capable(CAP_NET_ADMIN)) | |
315 | return -EACCES; | |
316 | return hci_dev_close(arg); | |
317 | ||
318 | case HCIDEVRESET: | |
319 | if (!capable(CAP_NET_ADMIN)) | |
320 | return -EACCES; | |
321 | return hci_dev_reset(arg); | |
322 | ||
323 | case HCIDEVRESTAT: | |
324 | if (!capable(CAP_NET_ADMIN)) | |
325 | return -EACCES; | |
326 | return hci_dev_reset_stat(arg); | |
327 | ||
328 | case HCISETSCAN: | |
329 | case HCISETAUTH: | |
330 | case HCISETENCRYPT: | |
331 | case HCISETPTYPE: | |
332 | case HCISETLINKPOL: | |
333 | case HCISETLINKMODE: | |
334 | case HCISETACLMTU: | |
335 | case HCISETSCOMTU: | |
336 | if (!capable(CAP_NET_ADMIN)) | |
337 | return -EACCES; | |
338 | return hci_dev_cmd(cmd, argp); | |
339 | ||
340 | case HCIINQUIRY: | |
341 | return hci_inquiry(argp); | |
342 | ||
343 | default: | |
344 | lock_sock(sk); | |
345 | err = hci_sock_bound_ioctl(sk, cmd, arg); | |
346 | release_sock(sk); | |
347 | return err; | |
348 | } | |
349 | } | |
350 | ||
351 | static int hci_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
352 | { | |
0381101f | 353 | struct sockaddr_hci haddr; |
1da177e4 LT |
354 | struct sock *sk = sock->sk; |
355 | struct hci_dev *hdev = NULL; | |
0381101f | 356 | int len, err = 0; |
1da177e4 LT |
357 | |
358 | BT_DBG("sock %p sk %p", sock, sk); | |
359 | ||
0381101f JH |
360 | if (!addr) |
361 | return -EINVAL; | |
362 | ||
363 | memset(&haddr, 0, sizeof(haddr)); | |
364 | len = min_t(unsigned int, sizeof(haddr), addr_len); | |
365 | memcpy(&haddr, addr, len); | |
366 | ||
367 | if (haddr.hci_family != AF_BLUETOOTH) | |
368 | return -EINVAL; | |
369 | ||
1da177e4 LT |
370 | lock_sock(sk); |
371 | ||
7cc2ade2 | 372 | if (sk->sk_state == BT_BOUND) { |
1da177e4 LT |
373 | err = -EALREADY; |
374 | goto done; | |
375 | } | |
376 | ||
7cc2ade2 MH |
377 | switch (haddr.hci_channel) { |
378 | case HCI_CHANNEL_RAW: | |
379 | if (hci_pi(sk)->hdev) { | |
380 | err = -EALREADY; | |
1da177e4 LT |
381 | goto done; |
382 | } | |
383 | ||
7cc2ade2 MH |
384 | if (haddr.hci_dev != HCI_DEV_NONE) { |
385 | hdev = hci_dev_get(haddr.hci_dev); | |
386 | if (!hdev) { | |
387 | err = -ENODEV; | |
388 | goto done; | |
389 | } | |
390 | ||
391 | atomic_inc(&hdev->promisc); | |
392 | } | |
393 | ||
394 | hci_pi(sk)->hdev = hdev; | |
395 | break; | |
396 | ||
397 | case HCI_CHANNEL_CONTROL: | |
398 | if (haddr.hci_dev != HCI_DEV_NONE || !enable_mgmt) { | |
399 | err = -EINVAL; | |
400 | goto done; | |
401 | } | |
402 | ||
403 | set_bit(HCI_PI_MGMT_INIT, &hci_pi(sk)->flags); | |
404 | break; | |
405 | ||
406 | default: | |
407 | err = -EINVAL; | |
408 | goto done; | |
1da177e4 LT |
409 | } |
410 | ||
7cc2ade2 | 411 | |
0381101f | 412 | hci_pi(sk)->channel = haddr.hci_channel; |
1da177e4 LT |
413 | sk->sk_state = BT_BOUND; |
414 | ||
415 | done: | |
416 | release_sock(sk); | |
417 | return err; | |
418 | } | |
419 | ||
420 | static int hci_sock_getname(struct socket *sock, struct sockaddr *addr, int *addr_len, int peer) | |
421 | { | |
422 | struct sockaddr_hci *haddr = (struct sockaddr_hci *) addr; | |
423 | struct sock *sk = sock->sk; | |
7b005bd3 | 424 | struct hci_dev *hdev = hci_pi(sk)->hdev; |
1da177e4 LT |
425 | |
426 | BT_DBG("sock %p sk %p", sock, sk); | |
427 | ||
7b005bd3 MH |
428 | if (!hdev) |
429 | return -EBADFD; | |
430 | ||
1da177e4 LT |
431 | lock_sock(sk); |
432 | ||
433 | *addr_len = sizeof(*haddr); | |
434 | haddr->hci_family = AF_BLUETOOTH; | |
7b005bd3 | 435 | haddr->hci_dev = hdev->id; |
1da177e4 LT |
436 | |
437 | release_sock(sk); | |
438 | return 0; | |
439 | } | |
440 | ||
441 | static inline void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_buff *skb) | |
442 | { | |
443 | __u32 mask = hci_pi(sk)->cmsg_mask; | |
444 | ||
0d48d939 MH |
445 | if (mask & HCI_CMSG_DIR) { |
446 | int incoming = bt_cb(skb)->incoming; | |
447 | put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming), &incoming); | |
448 | } | |
1da177e4 | 449 | |
a61bbcf2 | 450 | if (mask & HCI_CMSG_TSTAMP) { |
f6e623a6 JFS |
451 | #ifdef CONFIG_COMPAT |
452 | struct compat_timeval ctv; | |
453 | #endif | |
a61bbcf2 | 454 | struct timeval tv; |
767c5eb5 MH |
455 | void *data; |
456 | int len; | |
a61bbcf2 PM |
457 | |
458 | skb_get_timestamp(skb, &tv); | |
767c5eb5 | 459 | |
1da97f83 DM |
460 | data = &tv; |
461 | len = sizeof(tv); | |
462 | #ifdef CONFIG_COMPAT | |
767c5eb5 | 463 | if (msg->msg_flags & MSG_CMSG_COMPAT) { |
767c5eb5 MH |
464 | ctv.tv_sec = tv.tv_sec; |
465 | ctv.tv_usec = tv.tv_usec; | |
466 | data = &ctv; | |
467 | len = sizeof(ctv); | |
767c5eb5 | 468 | } |
1da97f83 | 469 | #endif |
767c5eb5 MH |
470 | |
471 | put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data); | |
a61bbcf2 | 472 | } |
1da177e4 | 473 | } |
8e87d142 YH |
474 | |
475 | static int hci_sock_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1da177e4 LT |
476 | struct msghdr *msg, size_t len, int flags) |
477 | { | |
478 | int noblock = flags & MSG_DONTWAIT; | |
479 | struct sock *sk = sock->sk; | |
480 | struct sk_buff *skb; | |
481 | int copied, err; | |
482 | ||
483 | BT_DBG("sock %p, sk %p", sock, sk); | |
484 | ||
485 | if (flags & (MSG_OOB)) | |
486 | return -EOPNOTSUPP; | |
487 | ||
488 | if (sk->sk_state == BT_CLOSED) | |
489 | return 0; | |
490 | ||
70f23020 AE |
491 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
492 | if (!skb) | |
1da177e4 LT |
493 | return err; |
494 | ||
495 | msg->msg_namelen = 0; | |
496 | ||
497 | copied = skb->len; | |
498 | if (len < copied) { | |
499 | msg->msg_flags |= MSG_TRUNC; | |
500 | copied = len; | |
501 | } | |
502 | ||
badff6d0 | 503 | skb_reset_transport_header(skb); |
1da177e4 LT |
504 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
505 | ||
3a208627 MH |
506 | switch (hci_pi(sk)->channel) { |
507 | case HCI_CHANNEL_RAW: | |
508 | hci_sock_cmsg(sk, msg, skb); | |
509 | break; | |
510 | } | |
1da177e4 LT |
511 | |
512 | skb_free_datagram(sk, skb); | |
513 | ||
514 | return err ? : copied; | |
515 | } | |
516 | ||
8e87d142 | 517 | static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
518 | struct msghdr *msg, size_t len) |
519 | { | |
520 | struct sock *sk = sock->sk; | |
521 | struct hci_dev *hdev; | |
522 | struct sk_buff *skb; | |
523 | int err; | |
524 | ||
525 | BT_DBG("sock %p sk %p", sock, sk); | |
526 | ||
527 | if (msg->msg_flags & MSG_OOB) | |
528 | return -EOPNOTSUPP; | |
529 | ||
530 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE)) | |
531 | return -EINVAL; | |
532 | ||
533 | if (len < 4 || len > HCI_MAX_FRAME_SIZE) | |
534 | return -EINVAL; | |
535 | ||
536 | lock_sock(sk); | |
537 | ||
0381101f JH |
538 | switch (hci_pi(sk)->channel) { |
539 | case HCI_CHANNEL_RAW: | |
540 | break; | |
541 | case HCI_CHANNEL_CONTROL: | |
542 | err = mgmt_control(sk, msg, len); | |
543 | goto done; | |
544 | default: | |
545 | err = -EINVAL; | |
546 | goto done; | |
547 | } | |
548 | ||
70f23020 AE |
549 | hdev = hci_pi(sk)->hdev; |
550 | if (!hdev) { | |
1da177e4 LT |
551 | err = -EBADFD; |
552 | goto done; | |
553 | } | |
554 | ||
7e21addc MH |
555 | if (!test_bit(HCI_UP, &hdev->flags)) { |
556 | err = -ENETDOWN; | |
557 | goto done; | |
558 | } | |
559 | ||
70f23020 AE |
560 | skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err); |
561 | if (!skb) | |
1da177e4 LT |
562 | goto done; |
563 | ||
564 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { | |
565 | err = -EFAULT; | |
566 | goto drop; | |
567 | } | |
568 | ||
0d48d939 | 569 | bt_cb(skb)->pkt_type = *((unsigned char *) skb->data); |
1da177e4 LT |
570 | skb_pull(skb, 1); |
571 | skb->dev = (void *) hdev; | |
572 | ||
0d48d939 | 573 | if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT) { |
83985319 | 574 | u16 opcode = get_unaligned_le16(skb->data); |
1da177e4 LT |
575 | u16 ogf = hci_opcode_ogf(opcode); |
576 | u16 ocf = hci_opcode_ocf(opcode); | |
577 | ||
578 | if (((ogf > HCI_SFLT_MAX_OGF) || | |
579 | !hci_test_bit(ocf & HCI_FLT_OCF_BITS, &hci_sec_filter.ocf_mask[ogf])) && | |
580 | !capable(CAP_NET_RAW)) { | |
581 | err = -EPERM; | |
582 | goto drop; | |
583 | } | |
584 | ||
a9de9248 | 585 | if (test_bit(HCI_RAW, &hdev->flags) || (ogf == 0x3f)) { |
1da177e4 | 586 | skb_queue_tail(&hdev->raw_q, skb); |
3eff45ea | 587 | queue_work(hdev->workqueue, &hdev->tx_work); |
1da177e4 LT |
588 | } else { |
589 | skb_queue_tail(&hdev->cmd_q, skb); | |
c347b765 | 590 | queue_work(hdev->workqueue, &hdev->cmd_work); |
1da177e4 LT |
591 | } |
592 | } else { | |
593 | if (!capable(CAP_NET_RAW)) { | |
594 | err = -EPERM; | |
595 | goto drop; | |
596 | } | |
597 | ||
598 | skb_queue_tail(&hdev->raw_q, skb); | |
3eff45ea | 599 | queue_work(hdev->workqueue, &hdev->tx_work); |
1da177e4 LT |
600 | } |
601 | ||
602 | err = len; | |
603 | ||
604 | done: | |
605 | release_sock(sk); | |
606 | return err; | |
607 | ||
608 | drop: | |
609 | kfree_skb(skb); | |
610 | goto done; | |
611 | } | |
612 | ||
b7058842 | 613 | static int hci_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int len) |
1da177e4 LT |
614 | { |
615 | struct hci_ufilter uf = { .opcode = 0 }; | |
616 | struct sock *sk = sock->sk; | |
617 | int err = 0, opt = 0; | |
618 | ||
619 | BT_DBG("sk %p, opt %d", sk, optname); | |
620 | ||
621 | lock_sock(sk); | |
622 | ||
2f39cdb7 MH |
623 | if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { |
624 | err = -EINVAL; | |
625 | goto done; | |
626 | } | |
627 | ||
1da177e4 LT |
628 | switch (optname) { |
629 | case HCI_DATA_DIR: | |
630 | if (get_user(opt, (int __user *)optval)) { | |
631 | err = -EFAULT; | |
632 | break; | |
633 | } | |
634 | ||
635 | if (opt) | |
636 | hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR; | |
637 | else | |
638 | hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR; | |
639 | break; | |
640 | ||
641 | case HCI_TIME_STAMP: | |
642 | if (get_user(opt, (int __user *)optval)) { | |
643 | err = -EFAULT; | |
644 | break; | |
645 | } | |
646 | ||
647 | if (opt) | |
648 | hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP; | |
649 | else | |
650 | hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP; | |
651 | break; | |
652 | ||
653 | case HCI_FILTER: | |
0878b666 MH |
654 | { |
655 | struct hci_filter *f = &hci_pi(sk)->filter; | |
656 | ||
657 | uf.type_mask = f->type_mask; | |
658 | uf.opcode = f->opcode; | |
659 | uf.event_mask[0] = *((u32 *) f->event_mask + 0); | |
660 | uf.event_mask[1] = *((u32 *) f->event_mask + 1); | |
661 | } | |
662 | ||
1da177e4 LT |
663 | len = min_t(unsigned int, len, sizeof(uf)); |
664 | if (copy_from_user(&uf, optval, len)) { | |
665 | err = -EFAULT; | |
666 | break; | |
667 | } | |
668 | ||
669 | if (!capable(CAP_NET_RAW)) { | |
670 | uf.type_mask &= hci_sec_filter.type_mask; | |
671 | uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0); | |
672 | uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1); | |
673 | } | |
674 | ||
675 | { | |
676 | struct hci_filter *f = &hci_pi(sk)->filter; | |
677 | ||
678 | f->type_mask = uf.type_mask; | |
679 | f->opcode = uf.opcode; | |
680 | *((u32 *) f->event_mask + 0) = uf.event_mask[0]; | |
681 | *((u32 *) f->event_mask + 1) = uf.event_mask[1]; | |
682 | } | |
8e87d142 | 683 | break; |
1da177e4 LT |
684 | |
685 | default: | |
686 | err = -ENOPROTOOPT; | |
687 | break; | |
688 | } | |
689 | ||
2f39cdb7 | 690 | done: |
1da177e4 LT |
691 | release_sock(sk); |
692 | return err; | |
693 | } | |
694 | ||
695 | static int hci_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
696 | { | |
697 | struct hci_ufilter uf; | |
698 | struct sock *sk = sock->sk; | |
cedc5469 MH |
699 | int len, opt, err = 0; |
700 | ||
701 | BT_DBG("sk %p, opt %d", sk, optname); | |
1da177e4 LT |
702 | |
703 | if (get_user(len, optlen)) | |
704 | return -EFAULT; | |
705 | ||
cedc5469 MH |
706 | lock_sock(sk); |
707 | ||
708 | if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { | |
709 | err = -EINVAL; | |
710 | goto done; | |
711 | } | |
712 | ||
1da177e4 LT |
713 | switch (optname) { |
714 | case HCI_DATA_DIR: | |
715 | if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR) | |
716 | opt = 1; | |
8e87d142 | 717 | else |
1da177e4 LT |
718 | opt = 0; |
719 | ||
720 | if (put_user(opt, optval)) | |
cedc5469 | 721 | err = -EFAULT; |
1da177e4 LT |
722 | break; |
723 | ||
724 | case HCI_TIME_STAMP: | |
725 | if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP) | |
726 | opt = 1; | |
8e87d142 | 727 | else |
1da177e4 LT |
728 | opt = 0; |
729 | ||
730 | if (put_user(opt, optval)) | |
cedc5469 | 731 | err = -EFAULT; |
1da177e4 LT |
732 | break; |
733 | ||
734 | case HCI_FILTER: | |
735 | { | |
736 | struct hci_filter *f = &hci_pi(sk)->filter; | |
737 | ||
738 | uf.type_mask = f->type_mask; | |
739 | uf.opcode = f->opcode; | |
740 | uf.event_mask[0] = *((u32 *) f->event_mask + 0); | |
741 | uf.event_mask[1] = *((u32 *) f->event_mask + 1); | |
742 | } | |
743 | ||
744 | len = min_t(unsigned int, len, sizeof(uf)); | |
745 | if (copy_to_user(optval, &uf, len)) | |
cedc5469 | 746 | err = -EFAULT; |
1da177e4 LT |
747 | break; |
748 | ||
749 | default: | |
cedc5469 | 750 | err = -ENOPROTOOPT; |
1da177e4 LT |
751 | break; |
752 | } | |
753 | ||
cedc5469 MH |
754 | done: |
755 | release_sock(sk); | |
756 | return err; | |
1da177e4 LT |
757 | } |
758 | ||
90ddc4f0 | 759 | static const struct proto_ops hci_sock_ops = { |
1da177e4 LT |
760 | .family = PF_BLUETOOTH, |
761 | .owner = THIS_MODULE, | |
762 | .release = hci_sock_release, | |
763 | .bind = hci_sock_bind, | |
764 | .getname = hci_sock_getname, | |
765 | .sendmsg = hci_sock_sendmsg, | |
766 | .recvmsg = hci_sock_recvmsg, | |
767 | .ioctl = hci_sock_ioctl, | |
768 | .poll = datagram_poll, | |
769 | .listen = sock_no_listen, | |
770 | .shutdown = sock_no_shutdown, | |
771 | .setsockopt = hci_sock_setsockopt, | |
772 | .getsockopt = hci_sock_getsockopt, | |
773 | .connect = sock_no_connect, | |
774 | .socketpair = sock_no_socketpair, | |
775 | .accept = sock_no_accept, | |
776 | .mmap = sock_no_mmap | |
777 | }; | |
778 | ||
779 | static struct proto hci_sk_proto = { | |
780 | .name = "HCI", | |
781 | .owner = THIS_MODULE, | |
782 | .obj_size = sizeof(struct hci_pinfo) | |
783 | }; | |
784 | ||
3f378b68 EP |
785 | static int hci_sock_create(struct net *net, struct socket *sock, int protocol, |
786 | int kern) | |
1da177e4 LT |
787 | { |
788 | struct sock *sk; | |
789 | ||
790 | BT_DBG("sock %p", sock); | |
791 | ||
792 | if (sock->type != SOCK_RAW) | |
793 | return -ESOCKTNOSUPPORT; | |
794 | ||
795 | sock->ops = &hci_sock_ops; | |
796 | ||
6257ff21 | 797 | sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto); |
1da177e4 LT |
798 | if (!sk) |
799 | return -ENOMEM; | |
800 | ||
801 | sock_init_data(sock, sk); | |
802 | ||
803 | sock_reset_flag(sk, SOCK_ZAPPED); | |
804 | ||
805 | sk->sk_protocol = protocol; | |
806 | ||
807 | sock->state = SS_UNCONNECTED; | |
808 | sk->sk_state = BT_OPEN; | |
809 | ||
810 | bt_sock_link(&hci_sk_list, sk); | |
811 | return 0; | |
812 | } | |
813 | ||
814 | static int hci_sock_dev_event(struct notifier_block *this, unsigned long event, void *ptr) | |
815 | { | |
816 | struct hci_dev *hdev = (struct hci_dev *) ptr; | |
817 | struct hci_ev_si_device ev; | |
818 | ||
819 | BT_DBG("hdev %s event %ld", hdev->name, event); | |
820 | ||
821 | /* Send event to sockets */ | |
822 | ev.event = event; | |
823 | ev.dev_id = hdev->id; | |
824 | hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev); | |
825 | ||
826 | if (event == HCI_DEV_UNREG) { | |
827 | struct sock *sk; | |
828 | struct hlist_node *node; | |
829 | ||
830 | /* Detach sockets from device */ | |
831 | read_lock(&hci_sk_list.lock); | |
832 | sk_for_each(sk, node, &hci_sk_list.head) { | |
4ce61d1c | 833 | bh_lock_sock_nested(sk); |
1da177e4 LT |
834 | if (hci_pi(sk)->hdev == hdev) { |
835 | hci_pi(sk)->hdev = NULL; | |
836 | sk->sk_err = EPIPE; | |
837 | sk->sk_state = BT_OPEN; | |
838 | sk->sk_state_change(sk); | |
839 | ||
840 | hci_dev_put(hdev); | |
841 | } | |
4ce61d1c | 842 | bh_unlock_sock(sk); |
1da177e4 LT |
843 | } |
844 | read_unlock(&hci_sk_list.lock); | |
845 | } | |
846 | ||
847 | return NOTIFY_DONE; | |
848 | } | |
849 | ||
ec1b4cf7 | 850 | static const struct net_proto_family hci_sock_family_ops = { |
1da177e4 LT |
851 | .family = PF_BLUETOOTH, |
852 | .owner = THIS_MODULE, | |
853 | .create = hci_sock_create, | |
854 | }; | |
855 | ||
856 | static struct notifier_block hci_sock_nblock = { | |
857 | .notifier_call = hci_sock_dev_event | |
858 | }; | |
859 | ||
860 | int __init hci_sock_init(void) | |
861 | { | |
862 | int err; | |
863 | ||
864 | err = proto_register(&hci_sk_proto, 0); | |
865 | if (err < 0) | |
866 | return err; | |
867 | ||
868 | err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops); | |
869 | if (err < 0) | |
870 | goto error; | |
871 | ||
872 | hci_register_notifier(&hci_sock_nblock); | |
873 | ||
874 | BT_INFO("HCI socket layer initialized"); | |
875 | ||
876 | return 0; | |
877 | ||
878 | error: | |
879 | BT_ERR("HCI socket registration failed"); | |
880 | proto_unregister(&hci_sk_proto); | |
881 | return err; | |
882 | } | |
883 | ||
b7440a14 | 884 | void hci_sock_cleanup(void) |
1da177e4 LT |
885 | { |
886 | if (bt_sock_unregister(BTPROTO_HCI) < 0) | |
887 | BT_ERR("HCI socket unregistration failed"); | |
888 | ||
889 | hci_unregister_notifier(&hci_sock_nblock); | |
890 | ||
891 | proto_unregister(&hci_sk_proto); | |
1da177e4 | 892 | } |
0381101f JH |
893 | |
894 | module_param(enable_mgmt, bool, 0644); | |
895 | MODULE_PARM_DESC(enable_mgmt, "Enable Management interface"); |