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