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Commit | Line | Data |
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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> | |
46 | #include <asm/uaccess.h> | |
47 | #include <asm/unaligned.h> | |
48 | ||
49 | #include <net/bluetooth/bluetooth.h> | |
50 | #include <net/bluetooth/hci_core.h> | |
51 | ||
1da177e4 LT |
52 | /* ----- HCI socket interface ----- */ |
53 | ||
54 | static inline int hci_test_bit(int nr, void *addr) | |
55 | { | |
56 | return *((__u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31)); | |
57 | } | |
58 | ||
59 | /* Security filter */ | |
60 | static struct hci_sec_filter hci_sec_filter = { | |
61 | /* Packet types */ | |
62 | 0x10, | |
63 | /* Events */ | |
dd7f5527 | 64 | { 0x1000d9fe, 0x0000b00c }, |
1da177e4 LT |
65 | /* Commands */ |
66 | { | |
67 | { 0x0 }, | |
68 | /* OGF_LINK_CTL */ | |
7c631a67 | 69 | { 0xbe000006, 0x00000001, 0x00000000, 0x00 }, |
1da177e4 | 70 | /* OGF_LINK_POLICY */ |
7c631a67 | 71 | { 0x00005200, 0x00000000, 0x00000000, 0x00 }, |
1da177e4 | 72 | /* OGF_HOST_CTL */ |
7c631a67 | 73 | { 0xaab00200, 0x2b402aaa, 0x05220154, 0x00 }, |
1da177e4 | 74 | /* OGF_INFO_PARAM */ |
7c631a67 | 75 | { 0x000002be, 0x00000000, 0x00000000, 0x00 }, |
1da177e4 | 76 | /* OGF_STATUS_PARAM */ |
7c631a67 | 77 | { 0x000000ea, 0x00000000, 0x00000000, 0x00 } |
1da177e4 LT |
78 | } |
79 | }; | |
80 | ||
81 | static struct bt_sock_list hci_sk_list = { | |
d5fb2962 | 82 | .lock = __RW_LOCK_UNLOCKED(hci_sk_list.lock) |
1da177e4 LT |
83 | }; |
84 | ||
85 | /* Send frame to RAW socket */ | |
86 | void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb) | |
87 | { | |
88 | struct sock *sk; | |
89 | struct hlist_node *node; | |
90 | ||
91 | BT_DBG("hdev %p len %d", hdev, skb->len); | |
92 | ||
93 | read_lock(&hci_sk_list.lock); | |
94 | sk_for_each(sk, node, &hci_sk_list.head) { | |
95 | struct hci_filter *flt; | |
96 | struct sk_buff *nskb; | |
97 | ||
98 | if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev) | |
99 | continue; | |
100 | ||
101 | /* Don't send frame to the socket it came from */ | |
102 | if (skb->sk == sk) | |
103 | continue; | |
104 | ||
105 | /* Apply filter */ | |
106 | flt = &hci_pi(sk)->filter; | |
107 | ||
0d48d939 MH |
108 | if (!test_bit((bt_cb(skb)->pkt_type == HCI_VENDOR_PKT) ? |
109 | 0 : (bt_cb(skb)->pkt_type & HCI_FLT_TYPE_BITS), &flt->type_mask)) | |
1da177e4 LT |
110 | continue; |
111 | ||
0d48d939 | 112 | if (bt_cb(skb)->pkt_type == HCI_EVENT_PKT) { |
1da177e4 LT |
113 | register int evt = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS); |
114 | ||
115 | if (!hci_test_bit(evt, &flt->event_mask)) | |
116 | continue; | |
117 | ||
4498c80d DM |
118 | if (flt->opcode && |
119 | ((evt == HCI_EV_CMD_COMPLETE && | |
120 | flt->opcode != | |
905f3ed6 | 121 | get_unaligned((__le16 *)(skb->data + 3))) || |
4498c80d DM |
122 | (evt == HCI_EV_CMD_STATUS && |
123 | flt->opcode != | |
905f3ed6 | 124 | get_unaligned((__le16 *)(skb->data + 4))))) |
1da177e4 LT |
125 | continue; |
126 | } | |
127 | ||
128 | if (!(nskb = skb_clone(skb, GFP_ATOMIC))) | |
129 | continue; | |
130 | ||
131 | /* Put type byte before the data */ | |
0d48d939 | 132 | memcpy(skb_push(nskb, 1), &bt_cb(nskb)->pkt_type, 1); |
1da177e4 LT |
133 | |
134 | if (sock_queue_rcv_skb(sk, nskb)) | |
135 | kfree_skb(nskb); | |
136 | } | |
137 | read_unlock(&hci_sk_list.lock); | |
138 | } | |
139 | ||
140 | static int hci_sock_release(struct socket *sock) | |
141 | { | |
142 | struct sock *sk = sock->sk; | |
7b005bd3 | 143 | struct hci_dev *hdev; |
1da177e4 LT |
144 | |
145 | BT_DBG("sock %p sk %p", sock, sk); | |
146 | ||
147 | if (!sk) | |
148 | return 0; | |
149 | ||
7b005bd3 MH |
150 | hdev = hci_pi(sk)->hdev; |
151 | ||
1da177e4 LT |
152 | bt_sock_unlink(&hci_sk_list, sk); |
153 | ||
154 | if (hdev) { | |
155 | atomic_dec(&hdev->promisc); | |
156 | hci_dev_put(hdev); | |
157 | } | |
158 | ||
159 | sock_orphan(sk); | |
160 | ||
161 | skb_queue_purge(&sk->sk_receive_queue); | |
162 | skb_queue_purge(&sk->sk_write_queue); | |
163 | ||
164 | sock_put(sk); | |
165 | return 0; | |
166 | } | |
167 | ||
f0358568 JH |
168 | struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr) |
169 | { | |
170 | struct list_head *p; | |
f0358568 | 171 | |
ea4bd8ba | 172 | list_for_each(p, &hdev->blacklist) { |
f0358568 JH |
173 | struct bdaddr_list *b; |
174 | ||
175 | b = list_entry(p, struct bdaddr_list, list); | |
176 | ||
177 | if (bacmp(bdaddr, &b->bdaddr) == 0) | |
178 | return b; | |
179 | } | |
180 | ||
181 | return NULL; | |
182 | } | |
183 | ||
184 | static int hci_blacklist_add(struct hci_dev *hdev, void __user *arg) | |
185 | { | |
186 | bdaddr_t bdaddr; | |
187 | struct bdaddr_list *entry; | |
188 | ||
189 | if (copy_from_user(&bdaddr, arg, sizeof(bdaddr))) | |
190 | return -EFAULT; | |
191 | ||
192 | if (bacmp(&bdaddr, BDADDR_ANY) == 0) | |
193 | return -EBADF; | |
194 | ||
195 | if (hci_blacklist_lookup(hdev, &bdaddr)) | |
196 | return -EEXIST; | |
197 | ||
198 | entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL); | |
199 | if (!entry) | |
200 | return -ENOMEM; | |
201 | ||
202 | bacpy(&entry->bdaddr, &bdaddr); | |
203 | ||
ea4bd8ba | 204 | list_add(&entry->list, &hdev->blacklist); |
f0358568 JH |
205 | |
206 | return 0; | |
207 | } | |
208 | ||
209 | int hci_blacklist_clear(struct hci_dev *hdev) | |
210 | { | |
211 | struct list_head *p, *n; | |
f0358568 | 212 | |
ea4bd8ba | 213 | list_for_each_safe(p, n, &hdev->blacklist) { |
f0358568 JH |
214 | struct bdaddr_list *b; |
215 | ||
216 | b = list_entry(p, struct bdaddr_list, list); | |
217 | ||
218 | list_del(p); | |
219 | kfree(b); | |
220 | } | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
225 | static int hci_blacklist_del(struct hci_dev *hdev, void __user *arg) | |
226 | { | |
227 | bdaddr_t bdaddr; | |
228 | struct bdaddr_list *entry; | |
229 | ||
230 | if (copy_from_user(&bdaddr, arg, sizeof(bdaddr))) | |
231 | return -EFAULT; | |
232 | ||
233 | if (bacmp(&bdaddr, BDADDR_ANY) == 0) | |
234 | return hci_blacklist_clear(hdev); | |
235 | ||
236 | entry = hci_blacklist_lookup(hdev, &bdaddr); | |
237 | if (!entry) | |
238 | return -ENOENT; | |
239 | ||
240 | list_del(&entry->list); | |
241 | kfree(entry); | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
8e87d142 | 246 | /* Ioctls that require bound socket */ |
1da177e4 LT |
247 | static inline int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) |
248 | { | |
249 | struct hci_dev *hdev = hci_pi(sk)->hdev; | |
250 | ||
251 | if (!hdev) | |
252 | return -EBADFD; | |
253 | ||
254 | switch (cmd) { | |
255 | case HCISETRAW: | |
256 | if (!capable(CAP_NET_ADMIN)) | |
257 | return -EACCES; | |
258 | ||
259 | if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) | |
260 | return -EPERM; | |
261 | ||
262 | if (arg) | |
263 | set_bit(HCI_RAW, &hdev->flags); | |
264 | else | |
265 | clear_bit(HCI_RAW, &hdev->flags); | |
266 | ||
267 | return 0; | |
268 | ||
1da177e4 | 269 | case HCIGETCONNINFO: |
40be492f MH |
270 | return hci_get_conn_info(hdev, (void __user *) arg); |
271 | ||
272 | case HCIGETAUTHINFO: | |
273 | return hci_get_auth_info(hdev, (void __user *) arg); | |
1da177e4 | 274 | |
f0358568 JH |
275 | case HCIBLOCKADDR: |
276 | if (!capable(CAP_NET_ADMIN)) | |
277 | return -EACCES; | |
278 | return hci_blacklist_add(hdev, (void __user *) arg); | |
279 | ||
280 | case HCIUNBLOCKADDR: | |
281 | if (!capable(CAP_NET_ADMIN)) | |
282 | return -EACCES; | |
283 | return hci_blacklist_del(hdev, (void __user *) arg); | |
284 | ||
1da177e4 LT |
285 | default: |
286 | if (hdev->ioctl) | |
287 | return hdev->ioctl(hdev, cmd, arg); | |
288 | return -EINVAL; | |
289 | } | |
290 | } | |
291 | ||
292 | static int hci_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
293 | { | |
294 | struct sock *sk = sock->sk; | |
40be492f | 295 | void __user *argp = (void __user *) arg; |
1da177e4 LT |
296 | int err; |
297 | ||
298 | BT_DBG("cmd %x arg %lx", cmd, arg); | |
299 | ||
300 | switch (cmd) { | |
301 | case HCIGETDEVLIST: | |
302 | return hci_get_dev_list(argp); | |
303 | ||
304 | case HCIGETDEVINFO: | |
305 | return hci_get_dev_info(argp); | |
306 | ||
307 | case HCIGETCONNLIST: | |
308 | return hci_get_conn_list(argp); | |
309 | ||
310 | case HCIDEVUP: | |
311 | if (!capable(CAP_NET_ADMIN)) | |
312 | return -EACCES; | |
313 | return hci_dev_open(arg); | |
314 | ||
315 | case HCIDEVDOWN: | |
316 | if (!capable(CAP_NET_ADMIN)) | |
317 | return -EACCES; | |
318 | return hci_dev_close(arg); | |
319 | ||
320 | case HCIDEVRESET: | |
321 | if (!capable(CAP_NET_ADMIN)) | |
322 | return -EACCES; | |
323 | return hci_dev_reset(arg); | |
324 | ||
325 | case HCIDEVRESTAT: | |
326 | if (!capable(CAP_NET_ADMIN)) | |
327 | return -EACCES; | |
328 | return hci_dev_reset_stat(arg); | |
329 | ||
330 | case HCISETSCAN: | |
331 | case HCISETAUTH: | |
332 | case HCISETENCRYPT: | |
333 | case HCISETPTYPE: | |
334 | case HCISETLINKPOL: | |
335 | case HCISETLINKMODE: | |
336 | case HCISETACLMTU: | |
337 | case HCISETSCOMTU: | |
338 | if (!capable(CAP_NET_ADMIN)) | |
339 | return -EACCES; | |
340 | return hci_dev_cmd(cmd, argp); | |
341 | ||
342 | case HCIINQUIRY: | |
343 | return hci_inquiry(argp); | |
344 | ||
345 | default: | |
346 | lock_sock(sk); | |
347 | err = hci_sock_bound_ioctl(sk, cmd, arg); | |
348 | release_sock(sk); | |
349 | return err; | |
350 | } | |
351 | } | |
352 | ||
353 | static int hci_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
354 | { | |
355 | struct sockaddr_hci *haddr = (struct sockaddr_hci *) addr; | |
356 | struct sock *sk = sock->sk; | |
357 | struct hci_dev *hdev = NULL; | |
358 | int err = 0; | |
359 | ||
360 | BT_DBG("sock %p sk %p", sock, sk); | |
361 | ||
362 | if (!haddr || haddr->hci_family != AF_BLUETOOTH) | |
363 | return -EINVAL; | |
364 | ||
365 | lock_sock(sk); | |
366 | ||
367 | if (hci_pi(sk)->hdev) { | |
368 | err = -EALREADY; | |
369 | goto done; | |
370 | } | |
371 | ||
372 | if (haddr->hci_dev != HCI_DEV_NONE) { | |
373 | if (!(hdev = hci_dev_get(haddr->hci_dev))) { | |
374 | err = -ENODEV; | |
375 | goto done; | |
376 | } | |
377 | ||
378 | atomic_inc(&hdev->promisc); | |
379 | } | |
380 | ||
381 | hci_pi(sk)->hdev = hdev; | |
382 | sk->sk_state = BT_BOUND; | |
383 | ||
384 | done: | |
385 | release_sock(sk); | |
386 | return err; | |
387 | } | |
388 | ||
389 | static int hci_sock_getname(struct socket *sock, struct sockaddr *addr, int *addr_len, int peer) | |
390 | { | |
391 | struct sockaddr_hci *haddr = (struct sockaddr_hci *) addr; | |
392 | struct sock *sk = sock->sk; | |
7b005bd3 | 393 | struct hci_dev *hdev = hci_pi(sk)->hdev; |
1da177e4 LT |
394 | |
395 | BT_DBG("sock %p sk %p", sock, sk); | |
396 | ||
7b005bd3 MH |
397 | if (!hdev) |
398 | return -EBADFD; | |
399 | ||
1da177e4 LT |
400 | lock_sock(sk); |
401 | ||
402 | *addr_len = sizeof(*haddr); | |
403 | haddr->hci_family = AF_BLUETOOTH; | |
7b005bd3 | 404 | haddr->hci_dev = hdev->id; |
1da177e4 LT |
405 | |
406 | release_sock(sk); | |
407 | return 0; | |
408 | } | |
409 | ||
410 | static inline void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_buff *skb) | |
411 | { | |
412 | __u32 mask = hci_pi(sk)->cmsg_mask; | |
413 | ||
0d48d939 MH |
414 | if (mask & HCI_CMSG_DIR) { |
415 | int incoming = bt_cb(skb)->incoming; | |
416 | put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming), &incoming); | |
417 | } | |
1da177e4 | 418 | |
a61bbcf2 | 419 | if (mask & HCI_CMSG_TSTAMP) { |
f6e623a6 JFS |
420 | #ifdef CONFIG_COMPAT |
421 | struct compat_timeval ctv; | |
422 | #endif | |
a61bbcf2 | 423 | struct timeval tv; |
767c5eb5 MH |
424 | void *data; |
425 | int len; | |
a61bbcf2 PM |
426 | |
427 | skb_get_timestamp(skb, &tv); | |
767c5eb5 | 428 | |
1da97f83 DM |
429 | data = &tv; |
430 | len = sizeof(tv); | |
431 | #ifdef CONFIG_COMPAT | |
767c5eb5 | 432 | if (msg->msg_flags & MSG_CMSG_COMPAT) { |
767c5eb5 MH |
433 | ctv.tv_sec = tv.tv_sec; |
434 | ctv.tv_usec = tv.tv_usec; | |
435 | data = &ctv; | |
436 | len = sizeof(ctv); | |
767c5eb5 | 437 | } |
1da97f83 | 438 | #endif |
767c5eb5 MH |
439 | |
440 | put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data); | |
a61bbcf2 | 441 | } |
1da177e4 | 442 | } |
8e87d142 YH |
443 | |
444 | static int hci_sock_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1da177e4 LT |
445 | struct msghdr *msg, size_t len, int flags) |
446 | { | |
447 | int noblock = flags & MSG_DONTWAIT; | |
448 | struct sock *sk = sock->sk; | |
449 | struct sk_buff *skb; | |
450 | int copied, err; | |
451 | ||
452 | BT_DBG("sock %p, sk %p", sock, sk); | |
453 | ||
454 | if (flags & (MSG_OOB)) | |
455 | return -EOPNOTSUPP; | |
456 | ||
457 | if (sk->sk_state == BT_CLOSED) | |
458 | return 0; | |
459 | ||
460 | if (!(skb = skb_recv_datagram(sk, flags, noblock, &err))) | |
461 | return err; | |
462 | ||
463 | msg->msg_namelen = 0; | |
464 | ||
465 | copied = skb->len; | |
466 | if (len < copied) { | |
467 | msg->msg_flags |= MSG_TRUNC; | |
468 | copied = len; | |
469 | } | |
470 | ||
badff6d0 | 471 | skb_reset_transport_header(skb); |
1da177e4 LT |
472 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
473 | ||
474 | hci_sock_cmsg(sk, msg, skb); | |
475 | ||
476 | skb_free_datagram(sk, skb); | |
477 | ||
478 | return err ? : copied; | |
479 | } | |
480 | ||
8e87d142 | 481 | static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
482 | struct msghdr *msg, size_t len) |
483 | { | |
484 | struct sock *sk = sock->sk; | |
485 | struct hci_dev *hdev; | |
486 | struct sk_buff *skb; | |
487 | int err; | |
488 | ||
489 | BT_DBG("sock %p sk %p", sock, sk); | |
490 | ||
491 | if (msg->msg_flags & MSG_OOB) | |
492 | return -EOPNOTSUPP; | |
493 | ||
494 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE)) | |
495 | return -EINVAL; | |
496 | ||
497 | if (len < 4 || len > HCI_MAX_FRAME_SIZE) | |
498 | return -EINVAL; | |
499 | ||
500 | lock_sock(sk); | |
501 | ||
502 | if (!(hdev = hci_pi(sk)->hdev)) { | |
503 | err = -EBADFD; | |
504 | goto done; | |
505 | } | |
506 | ||
7e21addc MH |
507 | if (!test_bit(HCI_UP, &hdev->flags)) { |
508 | err = -ENETDOWN; | |
509 | goto done; | |
510 | } | |
511 | ||
1da177e4 LT |
512 | if (!(skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err))) |
513 | goto done; | |
514 | ||
515 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { | |
516 | err = -EFAULT; | |
517 | goto drop; | |
518 | } | |
519 | ||
0d48d939 | 520 | bt_cb(skb)->pkt_type = *((unsigned char *) skb->data); |
1da177e4 LT |
521 | skb_pull(skb, 1); |
522 | skb->dev = (void *) hdev; | |
523 | ||
0d48d939 | 524 | if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT) { |
83985319 | 525 | u16 opcode = get_unaligned_le16(skb->data); |
1da177e4 LT |
526 | u16 ogf = hci_opcode_ogf(opcode); |
527 | u16 ocf = hci_opcode_ocf(opcode); | |
528 | ||
529 | if (((ogf > HCI_SFLT_MAX_OGF) || | |
530 | !hci_test_bit(ocf & HCI_FLT_OCF_BITS, &hci_sec_filter.ocf_mask[ogf])) && | |
531 | !capable(CAP_NET_RAW)) { | |
532 | err = -EPERM; | |
533 | goto drop; | |
534 | } | |
535 | ||
a9de9248 | 536 | if (test_bit(HCI_RAW, &hdev->flags) || (ogf == 0x3f)) { |
1da177e4 | 537 | skb_queue_tail(&hdev->raw_q, skb); |
c78ae283 | 538 | tasklet_schedule(&hdev->tx_task); |
1da177e4 LT |
539 | } else { |
540 | skb_queue_tail(&hdev->cmd_q, skb); | |
c78ae283 | 541 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
542 | } |
543 | } else { | |
544 | if (!capable(CAP_NET_RAW)) { | |
545 | err = -EPERM; | |
546 | goto drop; | |
547 | } | |
548 | ||
549 | skb_queue_tail(&hdev->raw_q, skb); | |
c78ae283 | 550 | tasklet_schedule(&hdev->tx_task); |
1da177e4 LT |
551 | } |
552 | ||
553 | err = len; | |
554 | ||
555 | done: | |
556 | release_sock(sk); | |
557 | return err; | |
558 | ||
559 | drop: | |
560 | kfree_skb(skb); | |
561 | goto done; | |
562 | } | |
563 | ||
b7058842 | 564 | static int hci_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int len) |
1da177e4 LT |
565 | { |
566 | struct hci_ufilter uf = { .opcode = 0 }; | |
567 | struct sock *sk = sock->sk; | |
568 | int err = 0, opt = 0; | |
569 | ||
570 | BT_DBG("sk %p, opt %d", sk, optname); | |
571 | ||
572 | lock_sock(sk); | |
573 | ||
574 | switch (optname) { | |
575 | case HCI_DATA_DIR: | |
576 | if (get_user(opt, (int __user *)optval)) { | |
577 | err = -EFAULT; | |
578 | break; | |
579 | } | |
580 | ||
581 | if (opt) | |
582 | hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR; | |
583 | else | |
584 | hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR; | |
585 | break; | |
586 | ||
587 | case HCI_TIME_STAMP: | |
588 | if (get_user(opt, (int __user *)optval)) { | |
589 | err = -EFAULT; | |
590 | break; | |
591 | } | |
592 | ||
593 | if (opt) | |
594 | hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP; | |
595 | else | |
596 | hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP; | |
597 | break; | |
598 | ||
599 | case HCI_FILTER: | |
0878b666 MH |
600 | { |
601 | struct hci_filter *f = &hci_pi(sk)->filter; | |
602 | ||
603 | uf.type_mask = f->type_mask; | |
604 | uf.opcode = f->opcode; | |
605 | uf.event_mask[0] = *((u32 *) f->event_mask + 0); | |
606 | uf.event_mask[1] = *((u32 *) f->event_mask + 1); | |
607 | } | |
608 | ||
1da177e4 LT |
609 | len = min_t(unsigned int, len, sizeof(uf)); |
610 | if (copy_from_user(&uf, optval, len)) { | |
611 | err = -EFAULT; | |
612 | break; | |
613 | } | |
614 | ||
615 | if (!capable(CAP_NET_RAW)) { | |
616 | uf.type_mask &= hci_sec_filter.type_mask; | |
617 | uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0); | |
618 | uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1); | |
619 | } | |
620 | ||
621 | { | |
622 | struct hci_filter *f = &hci_pi(sk)->filter; | |
623 | ||
624 | f->type_mask = uf.type_mask; | |
625 | f->opcode = uf.opcode; | |
626 | *((u32 *) f->event_mask + 0) = uf.event_mask[0]; | |
627 | *((u32 *) f->event_mask + 1) = uf.event_mask[1]; | |
628 | } | |
8e87d142 | 629 | break; |
1da177e4 LT |
630 | |
631 | default: | |
632 | err = -ENOPROTOOPT; | |
633 | break; | |
634 | } | |
635 | ||
636 | release_sock(sk); | |
637 | return err; | |
638 | } | |
639 | ||
640 | static int hci_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
641 | { | |
642 | struct hci_ufilter uf; | |
643 | struct sock *sk = sock->sk; | |
8e87d142 | 644 | int len, opt; |
1da177e4 LT |
645 | |
646 | if (get_user(len, optlen)) | |
647 | return -EFAULT; | |
648 | ||
649 | switch (optname) { | |
650 | case HCI_DATA_DIR: | |
651 | if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR) | |
652 | opt = 1; | |
8e87d142 | 653 | else |
1da177e4 LT |
654 | opt = 0; |
655 | ||
656 | if (put_user(opt, optval)) | |
657 | return -EFAULT; | |
658 | break; | |
659 | ||
660 | case HCI_TIME_STAMP: | |
661 | if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP) | |
662 | opt = 1; | |
8e87d142 | 663 | else |
1da177e4 LT |
664 | opt = 0; |
665 | ||
666 | if (put_user(opt, optval)) | |
667 | return -EFAULT; | |
668 | break; | |
669 | ||
670 | case HCI_FILTER: | |
671 | { | |
672 | struct hci_filter *f = &hci_pi(sk)->filter; | |
673 | ||
674 | uf.type_mask = f->type_mask; | |
675 | uf.opcode = f->opcode; | |
676 | uf.event_mask[0] = *((u32 *) f->event_mask + 0); | |
677 | uf.event_mask[1] = *((u32 *) f->event_mask + 1); | |
678 | } | |
679 | ||
680 | len = min_t(unsigned int, len, sizeof(uf)); | |
681 | if (copy_to_user(optval, &uf, len)) | |
682 | return -EFAULT; | |
683 | break; | |
684 | ||
685 | default: | |
686 | return -ENOPROTOOPT; | |
687 | break; | |
688 | } | |
689 | ||
690 | return 0; | |
691 | } | |
692 | ||
90ddc4f0 | 693 | static const struct proto_ops hci_sock_ops = { |
1da177e4 LT |
694 | .family = PF_BLUETOOTH, |
695 | .owner = THIS_MODULE, | |
696 | .release = hci_sock_release, | |
697 | .bind = hci_sock_bind, | |
698 | .getname = hci_sock_getname, | |
699 | .sendmsg = hci_sock_sendmsg, | |
700 | .recvmsg = hci_sock_recvmsg, | |
701 | .ioctl = hci_sock_ioctl, | |
702 | .poll = datagram_poll, | |
703 | .listen = sock_no_listen, | |
704 | .shutdown = sock_no_shutdown, | |
705 | .setsockopt = hci_sock_setsockopt, | |
706 | .getsockopt = hci_sock_getsockopt, | |
707 | .connect = sock_no_connect, | |
708 | .socketpair = sock_no_socketpair, | |
709 | .accept = sock_no_accept, | |
710 | .mmap = sock_no_mmap | |
711 | }; | |
712 | ||
713 | static struct proto hci_sk_proto = { | |
714 | .name = "HCI", | |
715 | .owner = THIS_MODULE, | |
716 | .obj_size = sizeof(struct hci_pinfo) | |
717 | }; | |
718 | ||
3f378b68 EP |
719 | static int hci_sock_create(struct net *net, struct socket *sock, int protocol, |
720 | int kern) | |
1da177e4 LT |
721 | { |
722 | struct sock *sk; | |
723 | ||
724 | BT_DBG("sock %p", sock); | |
725 | ||
726 | if (sock->type != SOCK_RAW) | |
727 | return -ESOCKTNOSUPPORT; | |
728 | ||
729 | sock->ops = &hci_sock_ops; | |
730 | ||
6257ff21 | 731 | sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto); |
1da177e4 LT |
732 | if (!sk) |
733 | return -ENOMEM; | |
734 | ||
735 | sock_init_data(sock, sk); | |
736 | ||
737 | sock_reset_flag(sk, SOCK_ZAPPED); | |
738 | ||
739 | sk->sk_protocol = protocol; | |
740 | ||
741 | sock->state = SS_UNCONNECTED; | |
742 | sk->sk_state = BT_OPEN; | |
743 | ||
744 | bt_sock_link(&hci_sk_list, sk); | |
745 | return 0; | |
746 | } | |
747 | ||
748 | static int hci_sock_dev_event(struct notifier_block *this, unsigned long event, void *ptr) | |
749 | { | |
750 | struct hci_dev *hdev = (struct hci_dev *) ptr; | |
751 | struct hci_ev_si_device ev; | |
752 | ||
753 | BT_DBG("hdev %s event %ld", hdev->name, event); | |
754 | ||
755 | /* Send event to sockets */ | |
756 | ev.event = event; | |
757 | ev.dev_id = hdev->id; | |
758 | hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev); | |
759 | ||
760 | if (event == HCI_DEV_UNREG) { | |
761 | struct sock *sk; | |
762 | struct hlist_node *node; | |
763 | ||
764 | /* Detach sockets from device */ | |
765 | read_lock(&hci_sk_list.lock); | |
766 | sk_for_each(sk, node, &hci_sk_list.head) { | |
4ce61d1c SS |
767 | local_bh_disable(); |
768 | bh_lock_sock_nested(sk); | |
1da177e4 LT |
769 | if (hci_pi(sk)->hdev == hdev) { |
770 | hci_pi(sk)->hdev = NULL; | |
771 | sk->sk_err = EPIPE; | |
772 | sk->sk_state = BT_OPEN; | |
773 | sk->sk_state_change(sk); | |
774 | ||
775 | hci_dev_put(hdev); | |
776 | } | |
4ce61d1c SS |
777 | bh_unlock_sock(sk); |
778 | local_bh_enable(); | |
1da177e4 LT |
779 | } |
780 | read_unlock(&hci_sk_list.lock); | |
781 | } | |
782 | ||
783 | return NOTIFY_DONE; | |
784 | } | |
785 | ||
ec1b4cf7 | 786 | static const struct net_proto_family hci_sock_family_ops = { |
1da177e4 LT |
787 | .family = PF_BLUETOOTH, |
788 | .owner = THIS_MODULE, | |
789 | .create = hci_sock_create, | |
790 | }; | |
791 | ||
792 | static struct notifier_block hci_sock_nblock = { | |
793 | .notifier_call = hci_sock_dev_event | |
794 | }; | |
795 | ||
796 | int __init hci_sock_init(void) | |
797 | { | |
798 | int err; | |
799 | ||
800 | err = proto_register(&hci_sk_proto, 0); | |
801 | if (err < 0) | |
802 | return err; | |
803 | ||
804 | err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops); | |
805 | if (err < 0) | |
806 | goto error; | |
807 | ||
808 | hci_register_notifier(&hci_sock_nblock); | |
809 | ||
810 | BT_INFO("HCI socket layer initialized"); | |
811 | ||
812 | return 0; | |
813 | ||
814 | error: | |
815 | BT_ERR("HCI socket registration failed"); | |
816 | proto_unregister(&hci_sk_proto); | |
817 | return err; | |
818 | } | |
819 | ||
04005dd9 | 820 | void __exit hci_sock_cleanup(void) |
1da177e4 LT |
821 | { |
822 | if (bt_sock_unregister(BTPROTO_HCI) < 0) | |
823 | BT_ERR("HCI socket unregistration failed"); | |
824 | ||
825 | hci_unregister_notifier(&hci_sock_nblock); | |
826 | ||
827 | proto_unregister(&hci_sk_proto); | |
1da177e4 | 828 | } |