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 address family and sockets. */ | |
26 | ||
1da177e4 LT |
27 | #include <linux/module.h> |
28 | ||
29 | #include <linux/types.h> | |
30 | #include <linux/list.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/skbuff.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/poll.h> | |
1da177e4 | 38 | #include <net/sock.h> |
3241ad82 | 39 | #include <asm/ioctls.h> |
1da177e4 | 40 | #include <linux/kmod.h> |
1da177e4 LT |
41 | |
42 | #include <net/bluetooth/bluetooth.h> | |
43 | ||
5f9018af | 44 | #define VERSION "2.15" |
1da177e4 LT |
45 | |
46 | /* Bluetooth sockets */ | |
47 | #define BT_MAX_PROTO 8 | |
ec1b4cf7 | 48 | static const struct net_proto_family *bt_proto[BT_MAX_PROTO]; |
db7aa1c2 | 49 | static DEFINE_RWLOCK(bt_proto_lock); |
68845cb2 | 50 | |
68845cb2 | 51 | static struct lock_class_key bt_lock_key[BT_MAX_PROTO]; |
36cbd3dc | 52 | static const char *const bt_key_strings[BT_MAX_PROTO] = { |
68845cb2 DY |
53 | "sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP", |
54 | "sk_lock-AF_BLUETOOTH-BTPROTO_HCI", | |
55 | "sk_lock-AF_BLUETOOTH-BTPROTO_SCO", | |
56 | "sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM", | |
57 | "sk_lock-AF_BLUETOOTH-BTPROTO_BNEP", | |
58 | "sk_lock-AF_BLUETOOTH-BTPROTO_CMTP", | |
59 | "sk_lock-AF_BLUETOOTH-BTPROTO_HIDP", | |
60 | "sk_lock-AF_BLUETOOTH-BTPROTO_AVDTP", | |
61 | }; | |
62 | ||
db7aa1c2 | 63 | static struct lock_class_key bt_slock_key[BT_MAX_PROTO]; |
36cbd3dc | 64 | static const char *const bt_slock_key_strings[BT_MAX_PROTO] = { |
68845cb2 DY |
65 | "slock-AF_BLUETOOTH-BTPROTO_L2CAP", |
66 | "slock-AF_BLUETOOTH-BTPROTO_HCI", | |
67 | "slock-AF_BLUETOOTH-BTPROTO_SCO", | |
68 | "slock-AF_BLUETOOTH-BTPROTO_RFCOMM", | |
69 | "slock-AF_BLUETOOTH-BTPROTO_BNEP", | |
70 | "slock-AF_BLUETOOTH-BTPROTO_CMTP", | |
71 | "slock-AF_BLUETOOTH-BTPROTO_HIDP", | |
72 | "slock-AF_BLUETOOTH-BTPROTO_AVDTP", | |
73 | }; | |
db7aa1c2 MH |
74 | |
75 | static inline void bt_sock_reclassify_lock(struct socket *sock, int proto) | |
76 | { | |
77 | struct sock *sk = sock->sk; | |
78 | ||
79 | if (!sk) | |
80 | return; | |
81 | ||
82 | BUG_ON(sock_owned_by_user(sk)); | |
83 | ||
84 | sock_lock_init_class_and_name(sk, | |
85 | bt_slock_key_strings[proto], &bt_slock_key[proto], | |
86 | bt_key_strings[proto], &bt_lock_key[proto]); | |
87 | } | |
1da177e4 | 88 | |
ec1b4cf7 | 89 | int bt_sock_register(int proto, const struct net_proto_family *ops) |
1da177e4 | 90 | { |
74da626a MH |
91 | int err = 0; |
92 | ||
1da177e4 LT |
93 | if (proto < 0 || proto >= BT_MAX_PROTO) |
94 | return -EINVAL; | |
95 | ||
74da626a MH |
96 | write_lock(&bt_proto_lock); |
97 | ||
1da177e4 | 98 | if (bt_proto[proto]) |
74da626a MH |
99 | err = -EEXIST; |
100 | else | |
101 | bt_proto[proto] = ops; | |
102 | ||
103 | write_unlock(&bt_proto_lock); | |
1da177e4 | 104 | |
74da626a | 105 | return err; |
1da177e4 LT |
106 | } |
107 | EXPORT_SYMBOL(bt_sock_register); | |
108 | ||
109 | int bt_sock_unregister(int proto) | |
110 | { | |
74da626a MH |
111 | int err = 0; |
112 | ||
1da177e4 LT |
113 | if (proto < 0 || proto >= BT_MAX_PROTO) |
114 | return -EINVAL; | |
115 | ||
74da626a MH |
116 | write_lock(&bt_proto_lock); |
117 | ||
1da177e4 | 118 | if (!bt_proto[proto]) |
74da626a MH |
119 | err = -ENOENT; |
120 | else | |
121 | bt_proto[proto] = NULL; | |
1da177e4 | 122 | |
74da626a MH |
123 | write_unlock(&bt_proto_lock); |
124 | ||
125 | return err; | |
1da177e4 LT |
126 | } |
127 | EXPORT_SYMBOL(bt_sock_unregister); | |
128 | ||
3f378b68 EP |
129 | static int bt_sock_create(struct net *net, struct socket *sock, int proto, |
130 | int kern) | |
1da177e4 | 131 | { |
74da626a | 132 | int err; |
1da177e4 | 133 | |
1b8d7ae4 EB |
134 | if (net != &init_net) |
135 | return -EAFNOSUPPORT; | |
136 | ||
1da177e4 LT |
137 | if (proto < 0 || proto >= BT_MAX_PROTO) |
138 | return -EINVAL; | |
139 | ||
95a5afca | 140 | if (!bt_proto[proto]) |
1da177e4 | 141 | request_module("bt-proto-%d", proto); |
74da626a | 142 | |
1da177e4 | 143 | err = -EPROTONOSUPPORT; |
74da626a MH |
144 | |
145 | read_lock(&bt_proto_lock); | |
146 | ||
1da177e4 | 147 | if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) { |
3f378b68 | 148 | err = bt_proto[proto]->create(net, sock, proto, kern); |
db7aa1c2 | 149 | bt_sock_reclassify_lock(sock, proto); |
1da177e4 LT |
150 | module_put(bt_proto[proto]->owner); |
151 | } | |
74da626a MH |
152 | |
153 | read_unlock(&bt_proto_lock); | |
154 | ||
8e87d142 | 155 | return err; |
1da177e4 LT |
156 | } |
157 | ||
158 | void bt_sock_link(struct bt_sock_list *l, struct sock *sk) | |
159 | { | |
160 | write_lock_bh(&l->lock); | |
161 | sk_add_node(sk, &l->head); | |
162 | write_unlock_bh(&l->lock); | |
163 | } | |
164 | EXPORT_SYMBOL(bt_sock_link); | |
165 | ||
166 | void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk) | |
167 | { | |
168 | write_lock_bh(&l->lock); | |
169 | sk_del_node_init(sk); | |
170 | write_unlock_bh(&l->lock); | |
171 | } | |
172 | EXPORT_SYMBOL(bt_sock_unlink); | |
173 | ||
174 | void bt_accept_enqueue(struct sock *parent, struct sock *sk) | |
175 | { | |
176 | BT_DBG("parent %p, sk %p", parent, sk); | |
177 | ||
178 | sock_hold(sk); | |
179 | list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q); | |
180 | bt_sk(sk)->parent = parent; | |
181 | parent->sk_ack_backlog++; | |
182 | } | |
183 | EXPORT_SYMBOL(bt_accept_enqueue); | |
184 | ||
185 | void bt_accept_unlink(struct sock *sk) | |
186 | { | |
187 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
188 | ||
189 | list_del_init(&bt_sk(sk)->accept_q); | |
190 | bt_sk(sk)->parent->sk_ack_backlog--; | |
191 | bt_sk(sk)->parent = NULL; | |
192 | sock_put(sk); | |
193 | } | |
194 | EXPORT_SYMBOL(bt_accept_unlink); | |
195 | ||
196 | struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock) | |
197 | { | |
198 | struct list_head *p, *n; | |
199 | struct sock *sk; | |
200 | ||
201 | BT_DBG("parent %p", parent); | |
202 | ||
203 | list_for_each_safe(p, n, &bt_sk(parent)->accept_q) { | |
204 | sk = (struct sock *) list_entry(p, struct bt_sock, accept_q); | |
205 | ||
206 | lock_sock(sk); | |
207 | ||
208 | /* FIXME: Is this check still needed */ | |
209 | if (sk->sk_state == BT_CLOSED) { | |
210 | release_sock(sk); | |
211 | bt_accept_unlink(sk); | |
212 | continue; | |
213 | } | |
214 | ||
c4f912e1 MH |
215 | if (sk->sk_state == BT_CONNECTED || !newsock || |
216 | bt_sk(parent)->defer_setup) { | |
1da177e4 LT |
217 | bt_accept_unlink(sk); |
218 | if (newsock) | |
219 | sock_graft(sk, newsock); | |
220 | release_sock(sk); | |
221 | return sk; | |
222 | } | |
223 | ||
224 | release_sock(sk); | |
225 | } | |
226 | return NULL; | |
227 | } | |
228 | EXPORT_SYMBOL(bt_accept_dequeue); | |
229 | ||
230 | int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock, | |
c4f912e1 | 231 | struct msghdr *msg, size_t len, int flags) |
1da177e4 LT |
232 | { |
233 | int noblock = flags & MSG_DONTWAIT; | |
234 | struct sock *sk = sock->sk; | |
235 | struct sk_buff *skb; | |
236 | size_t copied; | |
237 | int err; | |
238 | ||
a418b893 | 239 | BT_DBG("sock %p sk %p len %zu", sock, sk, len); |
1da177e4 LT |
240 | |
241 | if (flags & (MSG_OOB)) | |
242 | return -EOPNOTSUPP; | |
243 | ||
244 | if (!(skb = skb_recv_datagram(sk, flags, noblock, &err))) { | |
245 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
246 | return 0; | |
247 | return err; | |
248 | } | |
249 | ||
250 | msg->msg_namelen = 0; | |
251 | ||
252 | copied = skb->len; | |
253 | if (len < copied) { | |
254 | msg->msg_flags |= MSG_TRUNC; | |
255 | copied = len; | |
256 | } | |
257 | ||
badff6d0 | 258 | skb_reset_transport_header(skb); |
1da177e4 | 259 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
3241ad82 | 260 | if (err == 0) |
3b885787 | 261 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
262 | |
263 | skb_free_datagram(sk, skb); | |
264 | ||
265 | return err ? : copied; | |
266 | } | |
267 | EXPORT_SYMBOL(bt_sock_recvmsg); | |
268 | ||
269 | static inline unsigned int bt_accept_poll(struct sock *parent) | |
270 | { | |
271 | struct list_head *p, *n; | |
272 | struct sock *sk; | |
273 | ||
274 | list_for_each_safe(p, n, &bt_sk(parent)->accept_q) { | |
275 | sk = (struct sock *) list_entry(p, struct bt_sock, accept_q); | |
d5f2d2be MH |
276 | if (sk->sk_state == BT_CONNECTED || |
277 | (bt_sk(parent)->defer_setup && | |
278 | sk->sk_state == BT_CONNECT2)) | |
1da177e4 LT |
279 | return POLLIN | POLLRDNORM; |
280 | } | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
285 | unsigned int bt_sock_poll(struct file * file, struct socket *sock, poll_table *wait) | |
286 | { | |
287 | struct sock *sk = sock->sk; | |
288 | unsigned int mask = 0; | |
289 | ||
290 | BT_DBG("sock %p, sk %p", sock, sk); | |
291 | ||
292 | poll_wait(file, sk->sk_sleep, wait); | |
293 | ||
294 | if (sk->sk_state == BT_LISTEN) | |
295 | return bt_accept_poll(sk); | |
296 | ||
297 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
298 | mask |= POLLERR; | |
299 | ||
f348d70a DL |
300 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
301 | mask |= POLLRDHUP; | |
302 | ||
1da177e4 LT |
303 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
304 | mask |= POLLHUP; | |
305 | ||
8e87d142 | 306 | if (!skb_queue_empty(&sk->sk_receive_queue) || |
1da177e4 LT |
307 | (sk->sk_shutdown & RCV_SHUTDOWN)) |
308 | mask |= POLLIN | POLLRDNORM; | |
309 | ||
310 | if (sk->sk_state == BT_CLOSED) | |
311 | mask |= POLLHUP; | |
312 | ||
313 | if (sk->sk_state == BT_CONNECT || | |
314 | sk->sk_state == BT_CONNECT2 || | |
315 | sk->sk_state == BT_CONFIG) | |
316 | return mask; | |
317 | ||
318 | if (sock_writeable(sk)) | |
319 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; | |
320 | else | |
321 | set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); | |
322 | ||
323 | return mask; | |
324 | } | |
325 | EXPORT_SYMBOL(bt_sock_poll); | |
326 | ||
3241ad82 MH |
327 | int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
328 | { | |
329 | struct sock *sk = sock->sk; | |
43cbeee9 MH |
330 | struct sk_buff *skb; |
331 | long amount; | |
3241ad82 MH |
332 | int err; |
333 | ||
334 | BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg); | |
335 | ||
336 | switch (cmd) { | |
43cbeee9 MH |
337 | case TIOCOUTQ: |
338 | if (sk->sk_state == BT_LISTEN) | |
339 | return -EINVAL; | |
340 | ||
31e6d363 | 341 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
43cbeee9 MH |
342 | if (amount < 0) |
343 | amount = 0; | |
344 | err = put_user(amount, (int __user *) arg); | |
345 | break; | |
346 | ||
347 | case TIOCINQ: | |
348 | if (sk->sk_state == BT_LISTEN) | |
349 | return -EINVAL; | |
350 | ||
351 | lock_sock(sk); | |
352 | skb = skb_peek(&sk->sk_receive_queue); | |
353 | amount = skb ? skb->len : 0; | |
354 | release_sock(sk); | |
355 | err = put_user(amount, (int __user *) arg); | |
356 | break; | |
357 | ||
3241ad82 MH |
358 | case SIOCGSTAMP: |
359 | err = sock_get_timestamp(sk, (struct timeval __user *) arg); | |
360 | break; | |
361 | ||
362 | case SIOCGSTAMPNS: | |
363 | err = sock_get_timestampns(sk, (struct timespec __user *) arg); | |
364 | break; | |
365 | ||
366 | default: | |
367 | err = -ENOIOCTLCMD; | |
368 | break; | |
369 | } | |
370 | ||
371 | return err; | |
372 | } | |
373 | EXPORT_SYMBOL(bt_sock_ioctl); | |
374 | ||
1da177e4 LT |
375 | int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo) |
376 | { | |
377 | DECLARE_WAITQUEUE(wait, current); | |
378 | int err = 0; | |
379 | ||
380 | BT_DBG("sk %p", sk); | |
381 | ||
382 | add_wait_queue(sk->sk_sleep, &wait); | |
383 | while (sk->sk_state != state) { | |
384 | set_current_state(TASK_INTERRUPTIBLE); | |
385 | ||
386 | if (!timeo) { | |
b4c612a4 | 387 | err = -EINPROGRESS; |
1da177e4 LT |
388 | break; |
389 | } | |
390 | ||
391 | if (signal_pending(current)) { | |
392 | err = sock_intr_errno(timeo); | |
393 | break; | |
394 | } | |
395 | ||
396 | release_sock(sk); | |
397 | timeo = schedule_timeout(timeo); | |
398 | lock_sock(sk); | |
399 | ||
c1cbe4b7 BL |
400 | err = sock_error(sk); |
401 | if (err) | |
1da177e4 | 402 | break; |
1da177e4 LT |
403 | } |
404 | set_current_state(TASK_RUNNING); | |
405 | remove_wait_queue(sk->sk_sleep, &wait); | |
406 | return err; | |
407 | } | |
408 | EXPORT_SYMBOL(bt_sock_wait_state); | |
409 | ||
410 | static struct net_proto_family bt_sock_family_ops = { | |
411 | .owner = THIS_MODULE, | |
412 | .family = PF_BLUETOOTH, | |
413 | .create = bt_sock_create, | |
414 | }; | |
415 | ||
1da177e4 LT |
416 | static int __init bt_init(void) |
417 | { | |
27d35284 MH |
418 | int err; |
419 | ||
1da177e4 LT |
420 | BT_INFO("Core ver %s", VERSION); |
421 | ||
27d35284 MH |
422 | err = bt_sysfs_init(); |
423 | if (err < 0) | |
424 | return err; | |
1da177e4 | 425 | |
27d35284 MH |
426 | err = sock_register(&bt_sock_family_ops); |
427 | if (err < 0) { | |
428 | bt_sysfs_cleanup(); | |
429 | return err; | |
430 | } | |
1da177e4 | 431 | |
27d35284 | 432 | BT_INFO("HCI device and connection manager initialized"); |
1da177e4 LT |
433 | |
434 | hci_sock_init(); | |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
439 | static void __exit bt_exit(void) | |
440 | { | |
441 | hci_sock_cleanup(); | |
442 | ||
1da177e4 | 443 | sock_unregister(PF_BLUETOOTH); |
27d35284 MH |
444 | |
445 | bt_sysfs_cleanup(); | |
1da177e4 LT |
446 | } |
447 | ||
448 | subsys_initcall(bt_init); | |
449 | module_exit(bt_exit); | |
450 | ||
63fbd24e | 451 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
452 | MODULE_DESCRIPTION("Bluetooth Core ver " VERSION); |
453 | MODULE_VERSION(VERSION); | |
454 | MODULE_LICENSE("GPL"); | |
455 | MODULE_ALIAS_NETPROTO(PF_BLUETOOTH); |