Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | BlueZ - Bluetooth protocol stack for Linux | |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | ||
5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation; | |
10 | ||
11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES | |
16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
19 | ||
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, | |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
22 | SOFTWARE IS DISCLAIMED. | |
23 | */ | |
24 | ||
25 | /* Bluetooth HCI sockets. */ | |
26 | ||
27 | #include <linux/config.h> | |
28 | #include <linux/module.h> | |
29 | ||
30 | #include <linux/types.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/kernel.h> | |
1da177e4 LT |
33 | #include <linux/sched.h> |
34 | #include <linux/slab.h> | |
35 | #include <linux/poll.h> | |
36 | #include <linux/fcntl.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/skbuff.h> | |
39 | #include <linux/workqueue.h> | |
40 | #include <linux/interrupt.h> | |
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 | ||
52 | #ifndef CONFIG_BT_HCI_SOCK_DEBUG | |
53 | #undef BT_DBG | |
54 | #define BT_DBG(D...) | |
55 | #endif | |
56 | ||
57 | /* ----- HCI socket interface ----- */ | |
58 | ||
59 | static inline int hci_test_bit(int nr, void *addr) | |
60 | { | |
61 | return *((__u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31)); | |
62 | } | |
63 | ||
64 | /* Security filter */ | |
65 | static struct hci_sec_filter hci_sec_filter = { | |
66 | /* Packet types */ | |
67 | 0x10, | |
68 | /* Events */ | |
69 | { 0x1000d9fe, 0x0000300c }, | |
70 | /* Commands */ | |
71 | { | |
72 | { 0x0 }, | |
73 | /* OGF_LINK_CTL */ | |
74 | { 0xbe000006, 0x00000001, 0x0000, 0x00 }, | |
75 | /* OGF_LINK_POLICY */ | |
76 | { 0x00005200, 0x00000000, 0x0000, 0x00 }, | |
77 | /* OGF_HOST_CTL */ | |
78 | { 0xaab00200, 0x2b402aaa, 0x0154, 0x00 }, | |
79 | /* OGF_INFO_PARAM */ | |
80 | { 0x000002be, 0x00000000, 0x0000, 0x00 }, | |
81 | /* OGF_STATUS_PARAM */ | |
82 | { 0x000000ea, 0x00000000, 0x0000, 0x00 } | |
83 | } | |
84 | }; | |
85 | ||
86 | static struct bt_sock_list hci_sk_list = { | |
87 | .lock = RW_LOCK_UNLOCKED | |
88 | }; | |
89 | ||
90 | /* Send frame to RAW socket */ | |
91 | void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb) | |
92 | { | |
93 | struct sock *sk; | |
94 | struct hlist_node *node; | |
95 | ||
96 | BT_DBG("hdev %p len %d", hdev, skb->len); | |
97 | ||
98 | read_lock(&hci_sk_list.lock); | |
99 | sk_for_each(sk, node, &hci_sk_list.head) { | |
100 | struct hci_filter *flt; | |
101 | struct sk_buff *nskb; | |
102 | ||
103 | if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev) | |
104 | continue; | |
105 | ||
106 | /* Don't send frame to the socket it came from */ | |
107 | if (skb->sk == sk) | |
108 | continue; | |
109 | ||
110 | /* Apply filter */ | |
111 | flt = &hci_pi(sk)->filter; | |
112 | ||
0d48d939 MH |
113 | if (!test_bit((bt_cb(skb)->pkt_type == HCI_VENDOR_PKT) ? |
114 | 0 : (bt_cb(skb)->pkt_type & HCI_FLT_TYPE_BITS), &flt->type_mask)) | |
1da177e4 LT |
115 | continue; |
116 | ||
0d48d939 | 117 | if (bt_cb(skb)->pkt_type == HCI_EVENT_PKT) { |
1da177e4 LT |
118 | register int evt = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS); |
119 | ||
120 | if (!hci_test_bit(evt, &flt->event_mask)) | |
121 | continue; | |
122 | ||
123 | if (flt->opcode && ((evt == HCI_EV_CMD_COMPLETE && | |
124 | flt->opcode != *(__u16 *)(skb->data + 3)) || | |
125 | (evt == HCI_EV_CMD_STATUS && | |
126 | flt->opcode != *(__u16 *)(skb->data + 4)))) | |
127 | continue; | |
128 | } | |
129 | ||
130 | if (!(nskb = skb_clone(skb, GFP_ATOMIC))) | |
131 | continue; | |
132 | ||
133 | /* Put type byte before the data */ | |
0d48d939 | 134 | memcpy(skb_push(nskb, 1), &bt_cb(nskb)->pkt_type, 1); |
1da177e4 LT |
135 | |
136 | if (sock_queue_rcv_skb(sk, nskb)) | |
137 | kfree_skb(nskb); | |
138 | } | |
139 | read_unlock(&hci_sk_list.lock); | |
140 | } | |
141 | ||
142 | static int hci_sock_release(struct socket *sock) | |
143 | { | |
144 | struct sock *sk = sock->sk; | |
145 | struct hci_dev *hdev = hci_pi(sk)->hdev; | |
146 | ||
147 | BT_DBG("sock %p sk %p", sock, sk); | |
148 | ||
149 | if (!sk) | |
150 | return 0; | |
151 | ||
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 | ||
168 | /* Ioctls that require bound socket */ | |
169 | static inline int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) | |
170 | { | |
171 | struct hci_dev *hdev = hci_pi(sk)->hdev; | |
172 | ||
173 | if (!hdev) | |
174 | return -EBADFD; | |
175 | ||
176 | switch (cmd) { | |
177 | case HCISETRAW: | |
178 | if (!capable(CAP_NET_ADMIN)) | |
179 | return -EACCES; | |
180 | ||
181 | if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) | |
182 | return -EPERM; | |
183 | ||
184 | if (arg) | |
185 | set_bit(HCI_RAW, &hdev->flags); | |
186 | else | |
187 | clear_bit(HCI_RAW, &hdev->flags); | |
188 | ||
189 | return 0; | |
190 | ||
191 | case HCISETSECMGR: | |
192 | if (!capable(CAP_NET_ADMIN)) | |
193 | return -EACCES; | |
194 | ||
195 | if (arg) | |
196 | set_bit(HCI_SECMGR, &hdev->flags); | |
197 | else | |
198 | clear_bit(HCI_SECMGR, &hdev->flags); | |
199 | ||
200 | return 0; | |
201 | ||
202 | case HCIGETCONNINFO: | |
203 | return hci_get_conn_info(hdev, (void __user *)arg); | |
204 | ||
205 | default: | |
206 | if (hdev->ioctl) | |
207 | return hdev->ioctl(hdev, cmd, arg); | |
208 | return -EINVAL; | |
209 | } | |
210 | } | |
211 | ||
212 | static int hci_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
213 | { | |
214 | struct sock *sk = sock->sk; | |
215 | void __user *argp = (void __user *)arg; | |
216 | int err; | |
217 | ||
218 | BT_DBG("cmd %x arg %lx", cmd, arg); | |
219 | ||
220 | switch (cmd) { | |
221 | case HCIGETDEVLIST: | |
222 | return hci_get_dev_list(argp); | |
223 | ||
224 | case HCIGETDEVINFO: | |
225 | return hci_get_dev_info(argp); | |
226 | ||
227 | case HCIGETCONNLIST: | |
228 | return hci_get_conn_list(argp); | |
229 | ||
230 | case HCIDEVUP: | |
231 | if (!capable(CAP_NET_ADMIN)) | |
232 | return -EACCES; | |
233 | return hci_dev_open(arg); | |
234 | ||
235 | case HCIDEVDOWN: | |
236 | if (!capable(CAP_NET_ADMIN)) | |
237 | return -EACCES; | |
238 | return hci_dev_close(arg); | |
239 | ||
240 | case HCIDEVRESET: | |
241 | if (!capable(CAP_NET_ADMIN)) | |
242 | return -EACCES; | |
243 | return hci_dev_reset(arg); | |
244 | ||
245 | case HCIDEVRESTAT: | |
246 | if (!capable(CAP_NET_ADMIN)) | |
247 | return -EACCES; | |
248 | return hci_dev_reset_stat(arg); | |
249 | ||
250 | case HCISETSCAN: | |
251 | case HCISETAUTH: | |
252 | case HCISETENCRYPT: | |
253 | case HCISETPTYPE: | |
254 | case HCISETLINKPOL: | |
255 | case HCISETLINKMODE: | |
256 | case HCISETACLMTU: | |
257 | case HCISETSCOMTU: | |
258 | if (!capable(CAP_NET_ADMIN)) | |
259 | return -EACCES; | |
260 | return hci_dev_cmd(cmd, argp); | |
261 | ||
262 | case HCIINQUIRY: | |
263 | return hci_inquiry(argp); | |
264 | ||
265 | default: | |
266 | lock_sock(sk); | |
267 | err = hci_sock_bound_ioctl(sk, cmd, arg); | |
268 | release_sock(sk); | |
269 | return err; | |
270 | } | |
271 | } | |
272 | ||
273 | static int hci_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
274 | { | |
275 | struct sockaddr_hci *haddr = (struct sockaddr_hci *) addr; | |
276 | struct sock *sk = sock->sk; | |
277 | struct hci_dev *hdev = NULL; | |
278 | int err = 0; | |
279 | ||
280 | BT_DBG("sock %p sk %p", sock, sk); | |
281 | ||
282 | if (!haddr || haddr->hci_family != AF_BLUETOOTH) | |
283 | return -EINVAL; | |
284 | ||
285 | lock_sock(sk); | |
286 | ||
287 | if (hci_pi(sk)->hdev) { | |
288 | err = -EALREADY; | |
289 | goto done; | |
290 | } | |
291 | ||
292 | if (haddr->hci_dev != HCI_DEV_NONE) { | |
293 | if (!(hdev = hci_dev_get(haddr->hci_dev))) { | |
294 | err = -ENODEV; | |
295 | goto done; | |
296 | } | |
297 | ||
298 | atomic_inc(&hdev->promisc); | |
299 | } | |
300 | ||
301 | hci_pi(sk)->hdev = hdev; | |
302 | sk->sk_state = BT_BOUND; | |
303 | ||
304 | done: | |
305 | release_sock(sk); | |
306 | return err; | |
307 | } | |
308 | ||
309 | static int hci_sock_getname(struct socket *sock, struct sockaddr *addr, int *addr_len, int peer) | |
310 | { | |
311 | struct sockaddr_hci *haddr = (struct sockaddr_hci *) addr; | |
312 | struct sock *sk = sock->sk; | |
313 | ||
314 | BT_DBG("sock %p sk %p", sock, sk); | |
315 | ||
316 | lock_sock(sk); | |
317 | ||
318 | *addr_len = sizeof(*haddr); | |
319 | haddr->hci_family = AF_BLUETOOTH; | |
320 | haddr->hci_dev = hci_pi(sk)->hdev->id; | |
321 | ||
322 | release_sock(sk); | |
323 | return 0; | |
324 | } | |
325 | ||
326 | static inline void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_buff *skb) | |
327 | { | |
328 | __u32 mask = hci_pi(sk)->cmsg_mask; | |
329 | ||
0d48d939 MH |
330 | if (mask & HCI_CMSG_DIR) { |
331 | int incoming = bt_cb(skb)->incoming; | |
332 | put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming), &incoming); | |
333 | } | |
1da177e4 LT |
334 | |
335 | if (mask & HCI_CMSG_TSTAMP) | |
336 | put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, sizeof(skb->stamp), &skb->stamp); | |
337 | } | |
338 | ||
339 | static int hci_sock_recvmsg(struct kiocb *iocb, struct socket *sock, | |
340 | struct msghdr *msg, size_t len, int flags) | |
341 | { | |
342 | int noblock = flags & MSG_DONTWAIT; | |
343 | struct sock *sk = sock->sk; | |
344 | struct sk_buff *skb; | |
345 | int copied, err; | |
346 | ||
347 | BT_DBG("sock %p, sk %p", sock, sk); | |
348 | ||
349 | if (flags & (MSG_OOB)) | |
350 | return -EOPNOTSUPP; | |
351 | ||
352 | if (sk->sk_state == BT_CLOSED) | |
353 | return 0; | |
354 | ||
355 | if (!(skb = skb_recv_datagram(sk, flags, noblock, &err))) | |
356 | return err; | |
357 | ||
358 | msg->msg_namelen = 0; | |
359 | ||
360 | copied = skb->len; | |
361 | if (len < copied) { | |
362 | msg->msg_flags |= MSG_TRUNC; | |
363 | copied = len; | |
364 | } | |
365 | ||
366 | skb->h.raw = skb->data; | |
367 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
368 | ||
369 | hci_sock_cmsg(sk, msg, skb); | |
370 | ||
371 | skb_free_datagram(sk, skb); | |
372 | ||
373 | return err ? : copied; | |
374 | } | |
375 | ||
376 | static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock, | |
377 | struct msghdr *msg, size_t len) | |
378 | { | |
379 | struct sock *sk = sock->sk; | |
380 | struct hci_dev *hdev; | |
381 | struct sk_buff *skb; | |
382 | int err; | |
383 | ||
384 | BT_DBG("sock %p sk %p", sock, sk); | |
385 | ||
386 | if (msg->msg_flags & MSG_OOB) | |
387 | return -EOPNOTSUPP; | |
388 | ||
389 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE)) | |
390 | return -EINVAL; | |
391 | ||
392 | if (len < 4 || len > HCI_MAX_FRAME_SIZE) | |
393 | return -EINVAL; | |
394 | ||
395 | lock_sock(sk); | |
396 | ||
397 | if (!(hdev = hci_pi(sk)->hdev)) { | |
398 | err = -EBADFD; | |
399 | goto done; | |
400 | } | |
401 | ||
402 | if (!(skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err))) | |
403 | goto done; | |
404 | ||
405 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { | |
406 | err = -EFAULT; | |
407 | goto drop; | |
408 | } | |
409 | ||
0d48d939 | 410 | bt_cb(skb)->pkt_type = *((unsigned char *) skb->data); |
1da177e4 LT |
411 | skb_pull(skb, 1); |
412 | skb->dev = (void *) hdev; | |
413 | ||
0d48d939 | 414 | if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT) { |
1da177e4 LT |
415 | u16 opcode = __le16_to_cpu(get_unaligned((u16 *)skb->data)); |
416 | u16 ogf = hci_opcode_ogf(opcode); | |
417 | u16 ocf = hci_opcode_ocf(opcode); | |
418 | ||
419 | if (((ogf > HCI_SFLT_MAX_OGF) || | |
420 | !hci_test_bit(ocf & HCI_FLT_OCF_BITS, &hci_sec_filter.ocf_mask[ogf])) && | |
421 | !capable(CAP_NET_RAW)) { | |
422 | err = -EPERM; | |
423 | goto drop; | |
424 | } | |
425 | ||
426 | if (test_bit(HCI_RAW, &hdev->flags) || (ogf == OGF_VENDOR_CMD)) { | |
427 | skb_queue_tail(&hdev->raw_q, skb); | |
428 | hci_sched_tx(hdev); | |
429 | } else { | |
430 | skb_queue_tail(&hdev->cmd_q, skb); | |
431 | hci_sched_cmd(hdev); | |
432 | } | |
433 | } else { | |
434 | if (!capable(CAP_NET_RAW)) { | |
435 | err = -EPERM; | |
436 | goto drop; | |
437 | } | |
438 | ||
439 | skb_queue_tail(&hdev->raw_q, skb); | |
440 | hci_sched_tx(hdev); | |
441 | } | |
442 | ||
443 | err = len; | |
444 | ||
445 | done: | |
446 | release_sock(sk); | |
447 | return err; | |
448 | ||
449 | drop: | |
450 | kfree_skb(skb); | |
451 | goto done; | |
452 | } | |
453 | ||
454 | static int hci_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int len) | |
455 | { | |
456 | struct hci_ufilter uf = { .opcode = 0 }; | |
457 | struct sock *sk = sock->sk; | |
458 | int err = 0, opt = 0; | |
459 | ||
460 | BT_DBG("sk %p, opt %d", sk, optname); | |
461 | ||
462 | lock_sock(sk); | |
463 | ||
464 | switch (optname) { | |
465 | case HCI_DATA_DIR: | |
466 | if (get_user(opt, (int __user *)optval)) { | |
467 | err = -EFAULT; | |
468 | break; | |
469 | } | |
470 | ||
471 | if (opt) | |
472 | hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR; | |
473 | else | |
474 | hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR; | |
475 | break; | |
476 | ||
477 | case HCI_TIME_STAMP: | |
478 | if (get_user(opt, (int __user *)optval)) { | |
479 | err = -EFAULT; | |
480 | break; | |
481 | } | |
482 | ||
483 | if (opt) | |
484 | hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP; | |
485 | else | |
486 | hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP; | |
487 | break; | |
488 | ||
489 | case HCI_FILTER: | |
490 | len = min_t(unsigned int, len, sizeof(uf)); | |
491 | if (copy_from_user(&uf, optval, len)) { | |
492 | err = -EFAULT; | |
493 | break; | |
494 | } | |
495 | ||
496 | if (!capable(CAP_NET_RAW)) { | |
497 | uf.type_mask &= hci_sec_filter.type_mask; | |
498 | uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0); | |
499 | uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1); | |
500 | } | |
501 | ||
502 | { | |
503 | struct hci_filter *f = &hci_pi(sk)->filter; | |
504 | ||
505 | f->type_mask = uf.type_mask; | |
506 | f->opcode = uf.opcode; | |
507 | *((u32 *) f->event_mask + 0) = uf.event_mask[0]; | |
508 | *((u32 *) f->event_mask + 1) = uf.event_mask[1]; | |
509 | } | |
510 | break; | |
511 | ||
512 | default: | |
513 | err = -ENOPROTOOPT; | |
514 | break; | |
515 | } | |
516 | ||
517 | release_sock(sk); | |
518 | return err; | |
519 | } | |
520 | ||
521 | static int hci_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
522 | { | |
523 | struct hci_ufilter uf; | |
524 | struct sock *sk = sock->sk; | |
525 | int len, opt; | |
526 | ||
527 | if (get_user(len, optlen)) | |
528 | return -EFAULT; | |
529 | ||
530 | switch (optname) { | |
531 | case HCI_DATA_DIR: | |
532 | if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR) | |
533 | opt = 1; | |
534 | else | |
535 | opt = 0; | |
536 | ||
537 | if (put_user(opt, optval)) | |
538 | return -EFAULT; | |
539 | break; | |
540 | ||
541 | case HCI_TIME_STAMP: | |
542 | if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP) | |
543 | opt = 1; | |
544 | else | |
545 | opt = 0; | |
546 | ||
547 | if (put_user(opt, optval)) | |
548 | return -EFAULT; | |
549 | break; | |
550 | ||
551 | case HCI_FILTER: | |
552 | { | |
553 | struct hci_filter *f = &hci_pi(sk)->filter; | |
554 | ||
555 | uf.type_mask = f->type_mask; | |
556 | uf.opcode = f->opcode; | |
557 | uf.event_mask[0] = *((u32 *) f->event_mask + 0); | |
558 | uf.event_mask[1] = *((u32 *) f->event_mask + 1); | |
559 | } | |
560 | ||
561 | len = min_t(unsigned int, len, sizeof(uf)); | |
562 | if (copy_to_user(optval, &uf, len)) | |
563 | return -EFAULT; | |
564 | break; | |
565 | ||
566 | default: | |
567 | return -ENOPROTOOPT; | |
568 | break; | |
569 | } | |
570 | ||
571 | return 0; | |
572 | } | |
573 | ||
574 | static struct proto_ops hci_sock_ops = { | |
575 | .family = PF_BLUETOOTH, | |
576 | .owner = THIS_MODULE, | |
577 | .release = hci_sock_release, | |
578 | .bind = hci_sock_bind, | |
579 | .getname = hci_sock_getname, | |
580 | .sendmsg = hci_sock_sendmsg, | |
581 | .recvmsg = hci_sock_recvmsg, | |
582 | .ioctl = hci_sock_ioctl, | |
583 | .poll = datagram_poll, | |
584 | .listen = sock_no_listen, | |
585 | .shutdown = sock_no_shutdown, | |
586 | .setsockopt = hci_sock_setsockopt, | |
587 | .getsockopt = hci_sock_getsockopt, | |
588 | .connect = sock_no_connect, | |
589 | .socketpair = sock_no_socketpair, | |
590 | .accept = sock_no_accept, | |
591 | .mmap = sock_no_mmap | |
592 | }; | |
593 | ||
594 | static struct proto hci_sk_proto = { | |
595 | .name = "HCI", | |
596 | .owner = THIS_MODULE, | |
597 | .obj_size = sizeof(struct hci_pinfo) | |
598 | }; | |
599 | ||
600 | static int hci_sock_create(struct socket *sock, int protocol) | |
601 | { | |
602 | struct sock *sk; | |
603 | ||
604 | BT_DBG("sock %p", sock); | |
605 | ||
606 | if (sock->type != SOCK_RAW) | |
607 | return -ESOCKTNOSUPPORT; | |
608 | ||
609 | sock->ops = &hci_sock_ops; | |
610 | ||
611 | sk = sk_alloc(PF_BLUETOOTH, GFP_KERNEL, &hci_sk_proto, 1); | |
612 | if (!sk) | |
613 | return -ENOMEM; | |
614 | ||
615 | sock_init_data(sock, sk); | |
616 | ||
617 | sock_reset_flag(sk, SOCK_ZAPPED); | |
618 | ||
619 | sk->sk_protocol = protocol; | |
620 | ||
621 | sock->state = SS_UNCONNECTED; | |
622 | sk->sk_state = BT_OPEN; | |
623 | ||
624 | bt_sock_link(&hci_sk_list, sk); | |
625 | return 0; | |
626 | } | |
627 | ||
628 | static int hci_sock_dev_event(struct notifier_block *this, unsigned long event, void *ptr) | |
629 | { | |
630 | struct hci_dev *hdev = (struct hci_dev *) ptr; | |
631 | struct hci_ev_si_device ev; | |
632 | ||
633 | BT_DBG("hdev %s event %ld", hdev->name, event); | |
634 | ||
635 | /* Send event to sockets */ | |
636 | ev.event = event; | |
637 | ev.dev_id = hdev->id; | |
638 | hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev); | |
639 | ||
640 | if (event == HCI_DEV_UNREG) { | |
641 | struct sock *sk; | |
642 | struct hlist_node *node; | |
643 | ||
644 | /* Detach sockets from device */ | |
645 | read_lock(&hci_sk_list.lock); | |
646 | sk_for_each(sk, node, &hci_sk_list.head) { | |
647 | bh_lock_sock(sk); | |
648 | if (hci_pi(sk)->hdev == hdev) { | |
649 | hci_pi(sk)->hdev = NULL; | |
650 | sk->sk_err = EPIPE; | |
651 | sk->sk_state = BT_OPEN; | |
652 | sk->sk_state_change(sk); | |
653 | ||
654 | hci_dev_put(hdev); | |
655 | } | |
656 | bh_unlock_sock(sk); | |
657 | } | |
658 | read_unlock(&hci_sk_list.lock); | |
659 | } | |
660 | ||
661 | return NOTIFY_DONE; | |
662 | } | |
663 | ||
664 | static struct net_proto_family hci_sock_family_ops = { | |
665 | .family = PF_BLUETOOTH, | |
666 | .owner = THIS_MODULE, | |
667 | .create = hci_sock_create, | |
668 | }; | |
669 | ||
670 | static struct notifier_block hci_sock_nblock = { | |
671 | .notifier_call = hci_sock_dev_event | |
672 | }; | |
673 | ||
674 | int __init hci_sock_init(void) | |
675 | { | |
676 | int err; | |
677 | ||
678 | err = proto_register(&hci_sk_proto, 0); | |
679 | if (err < 0) | |
680 | return err; | |
681 | ||
682 | err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops); | |
683 | if (err < 0) | |
684 | goto error; | |
685 | ||
686 | hci_register_notifier(&hci_sock_nblock); | |
687 | ||
688 | BT_INFO("HCI socket layer initialized"); | |
689 | ||
690 | return 0; | |
691 | ||
692 | error: | |
693 | BT_ERR("HCI socket registration failed"); | |
694 | proto_unregister(&hci_sk_proto); | |
695 | return err; | |
696 | } | |
697 | ||
698 | int __exit hci_sock_cleanup(void) | |
699 | { | |
700 | if (bt_sock_unregister(BTPROTO_HCI) < 0) | |
701 | BT_ERR("HCI socket unregistration failed"); | |
702 | ||
703 | hci_unregister_notifier(&hci_sock_nblock); | |
704 | ||
705 | proto_unregister(&hci_sk_proto); | |
706 | ||
707 | return 0; | |
708 | } |