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 | ||
44 | #ifndef CONFIG_BT_SOCK_DEBUG | |
45 | #undef BT_DBG | |
46 | #define BT_DBG(D...) | |
47 | #endif | |
48 | ||
e7c29cb1 | 49 | #define VERSION "2.13" |
1da177e4 LT |
50 | |
51 | /* Bluetooth sockets */ | |
52 | #define BT_MAX_PROTO 8 | |
53 | static struct net_proto_family *bt_proto[BT_MAX_PROTO]; | |
68845cb2 DY |
54 | |
55 | static struct lock_class_key bt_slock_key[BT_MAX_PROTO]; | |
56 | static struct lock_class_key bt_lock_key[BT_MAX_PROTO]; | |
57 | static const char *bt_key_strings[BT_MAX_PROTO] = { | |
58 | "sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP", | |
59 | "sk_lock-AF_BLUETOOTH-BTPROTO_HCI", | |
60 | "sk_lock-AF_BLUETOOTH-BTPROTO_SCO", | |
61 | "sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM", | |
62 | "sk_lock-AF_BLUETOOTH-BTPROTO_BNEP", | |
63 | "sk_lock-AF_BLUETOOTH-BTPROTO_CMTP", | |
64 | "sk_lock-AF_BLUETOOTH-BTPROTO_HIDP", | |
65 | "sk_lock-AF_BLUETOOTH-BTPROTO_AVDTP", | |
66 | }; | |
67 | ||
68 | static const char *bt_slock_key_strings[BT_MAX_PROTO] = { | |
69 | "slock-AF_BLUETOOTH-BTPROTO_L2CAP", | |
70 | "slock-AF_BLUETOOTH-BTPROTO_HCI", | |
71 | "slock-AF_BLUETOOTH-BTPROTO_SCO", | |
72 | "slock-AF_BLUETOOTH-BTPROTO_RFCOMM", | |
73 | "slock-AF_BLUETOOTH-BTPROTO_BNEP", | |
74 | "slock-AF_BLUETOOTH-BTPROTO_CMTP", | |
75 | "slock-AF_BLUETOOTH-BTPROTO_HIDP", | |
76 | "slock-AF_BLUETOOTH-BTPROTO_AVDTP", | |
77 | }; | |
74da626a | 78 | static DEFINE_RWLOCK(bt_proto_lock); |
1da177e4 LT |
79 | |
80 | int bt_sock_register(int proto, struct net_proto_family *ops) | |
81 | { | |
74da626a MH |
82 | int err = 0; |
83 | ||
1da177e4 LT |
84 | if (proto < 0 || proto >= BT_MAX_PROTO) |
85 | return -EINVAL; | |
86 | ||
74da626a MH |
87 | write_lock(&bt_proto_lock); |
88 | ||
1da177e4 | 89 | if (bt_proto[proto]) |
74da626a MH |
90 | err = -EEXIST; |
91 | else | |
92 | bt_proto[proto] = ops; | |
93 | ||
94 | write_unlock(&bt_proto_lock); | |
1da177e4 | 95 | |
74da626a | 96 | return err; |
1da177e4 LT |
97 | } |
98 | EXPORT_SYMBOL(bt_sock_register); | |
99 | ||
100 | int bt_sock_unregister(int proto) | |
101 | { | |
74da626a MH |
102 | int err = 0; |
103 | ||
1da177e4 LT |
104 | if (proto < 0 || proto >= BT_MAX_PROTO) |
105 | return -EINVAL; | |
106 | ||
74da626a MH |
107 | write_lock(&bt_proto_lock); |
108 | ||
1da177e4 | 109 | if (!bt_proto[proto]) |
74da626a MH |
110 | err = -ENOENT; |
111 | else | |
112 | bt_proto[proto] = NULL; | |
1da177e4 | 113 | |
74da626a MH |
114 | write_unlock(&bt_proto_lock); |
115 | ||
116 | return err; | |
1da177e4 LT |
117 | } |
118 | EXPORT_SYMBOL(bt_sock_unregister); | |
119 | ||
68845cb2 DY |
120 | static void bt_reclassify_sock_lock(struct socket *sock, int proto) |
121 | { | |
122 | struct sock *sk = sock->sk; | |
123 | ||
124 | if (!sk) | |
125 | return; | |
126 | BUG_ON(sock_owned_by_user(sk)); | |
127 | ||
128 | sock_lock_init_class_and_name(sk, | |
129 | bt_slock_key_strings[proto], | |
130 | &bt_slock_key[proto], | |
131 | bt_key_strings[proto], | |
132 | &bt_lock_key[proto]); | |
133 | } | |
134 | ||
1b8d7ae4 | 135 | static int bt_sock_create(struct net *net, struct socket *sock, int proto) |
1da177e4 | 136 | { |
74da626a | 137 | int err; |
1da177e4 | 138 | |
1b8d7ae4 EB |
139 | if (net != &init_net) |
140 | return -EAFNOSUPPORT; | |
141 | ||
1da177e4 LT |
142 | if (proto < 0 || proto >= BT_MAX_PROTO) |
143 | return -EINVAL; | |
144 | ||
95a5afca | 145 | if (!bt_proto[proto]) |
1da177e4 | 146 | request_module("bt-proto-%d", proto); |
74da626a | 147 | |
1da177e4 | 148 | err = -EPROTONOSUPPORT; |
74da626a MH |
149 | |
150 | read_lock(&bt_proto_lock); | |
151 | ||
1da177e4 | 152 | if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) { |
1b8d7ae4 | 153 | err = bt_proto[proto]->create(net, sock, proto); |
68845cb2 | 154 | bt_reclassify_sock_lock(sock, proto); |
1da177e4 LT |
155 | module_put(bt_proto[proto]->owner); |
156 | } | |
74da626a MH |
157 | |
158 | read_unlock(&bt_proto_lock); | |
159 | ||
8e87d142 | 160 | return err; |
1da177e4 LT |
161 | } |
162 | ||
163 | void bt_sock_link(struct bt_sock_list *l, struct sock *sk) | |
164 | { | |
165 | write_lock_bh(&l->lock); | |
166 | sk_add_node(sk, &l->head); | |
167 | write_unlock_bh(&l->lock); | |
168 | } | |
169 | EXPORT_SYMBOL(bt_sock_link); | |
170 | ||
171 | void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk) | |
172 | { | |
173 | write_lock_bh(&l->lock); | |
174 | sk_del_node_init(sk); | |
175 | write_unlock_bh(&l->lock); | |
176 | } | |
177 | EXPORT_SYMBOL(bt_sock_unlink); | |
178 | ||
179 | void bt_accept_enqueue(struct sock *parent, struct sock *sk) | |
180 | { | |
181 | BT_DBG("parent %p, sk %p", parent, sk); | |
182 | ||
183 | sock_hold(sk); | |
184 | list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q); | |
185 | bt_sk(sk)->parent = parent; | |
186 | parent->sk_ack_backlog++; | |
187 | } | |
188 | EXPORT_SYMBOL(bt_accept_enqueue); | |
189 | ||
190 | void bt_accept_unlink(struct sock *sk) | |
191 | { | |
192 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
193 | ||
194 | list_del_init(&bt_sk(sk)->accept_q); | |
195 | bt_sk(sk)->parent->sk_ack_backlog--; | |
196 | bt_sk(sk)->parent = NULL; | |
197 | sock_put(sk); | |
198 | } | |
199 | EXPORT_SYMBOL(bt_accept_unlink); | |
200 | ||
201 | struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock) | |
202 | { | |
203 | struct list_head *p, *n; | |
204 | struct sock *sk; | |
205 | ||
206 | BT_DBG("parent %p", parent); | |
207 | ||
208 | list_for_each_safe(p, n, &bt_sk(parent)->accept_q) { | |
209 | sk = (struct sock *) list_entry(p, struct bt_sock, accept_q); | |
210 | ||
211 | lock_sock(sk); | |
212 | ||
213 | /* FIXME: Is this check still needed */ | |
214 | if (sk->sk_state == BT_CLOSED) { | |
215 | release_sock(sk); | |
216 | bt_accept_unlink(sk); | |
217 | continue; | |
218 | } | |
219 | ||
220 | if (sk->sk_state == BT_CONNECTED || !newsock) { | |
221 | bt_accept_unlink(sk); | |
222 | if (newsock) | |
223 | sock_graft(sk, newsock); | |
224 | release_sock(sk); | |
225 | return sk; | |
226 | } | |
227 | ||
228 | release_sock(sk); | |
229 | } | |
230 | return NULL; | |
231 | } | |
232 | EXPORT_SYMBOL(bt_accept_dequeue); | |
233 | ||
234 | int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock, | |
235 | struct msghdr *msg, size_t len, int flags) | |
236 | { | |
237 | int noblock = flags & MSG_DONTWAIT; | |
238 | struct sock *sk = sock->sk; | |
239 | struct sk_buff *skb; | |
240 | size_t copied; | |
241 | int err; | |
242 | ||
243 | BT_DBG("sock %p sk %p len %d", sock, sk, len); | |
244 | ||
245 | if (flags & (MSG_OOB)) | |
246 | return -EOPNOTSUPP; | |
247 | ||
248 | if (!(skb = skb_recv_datagram(sk, flags, noblock, &err))) { | |
249 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
250 | return 0; | |
251 | return err; | |
252 | } | |
253 | ||
254 | msg->msg_namelen = 0; | |
255 | ||
256 | copied = skb->len; | |
257 | if (len < copied) { | |
258 | msg->msg_flags |= MSG_TRUNC; | |
259 | copied = len; | |
260 | } | |
261 | ||
badff6d0 | 262 | skb_reset_transport_header(skb); |
1da177e4 | 263 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
3241ad82 MH |
264 | if (err == 0) |
265 | sock_recv_timestamp(msg, sk, skb); | |
1da177e4 LT |
266 | |
267 | skb_free_datagram(sk, skb); | |
268 | ||
269 | return err ? : copied; | |
270 | } | |
271 | EXPORT_SYMBOL(bt_sock_recvmsg); | |
272 | ||
273 | static inline unsigned int bt_accept_poll(struct sock *parent) | |
274 | { | |
275 | struct list_head *p, *n; | |
276 | struct sock *sk; | |
277 | ||
278 | list_for_each_safe(p, n, &bt_sk(parent)->accept_q) { | |
279 | sk = (struct sock *) list_entry(p, struct bt_sock, accept_q); | |
280 | if (sk->sk_state == BT_CONNECTED) | |
281 | return POLLIN | POLLRDNORM; | |
282 | } | |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
287 | unsigned int bt_sock_poll(struct file * file, struct socket *sock, poll_table *wait) | |
288 | { | |
289 | struct sock *sk = sock->sk; | |
290 | unsigned int mask = 0; | |
291 | ||
292 | BT_DBG("sock %p, sk %p", sock, sk); | |
293 | ||
294 | poll_wait(file, sk->sk_sleep, wait); | |
295 | ||
296 | if (sk->sk_state == BT_LISTEN) | |
297 | return bt_accept_poll(sk); | |
298 | ||
299 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
300 | mask |= POLLERR; | |
301 | ||
f348d70a DL |
302 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
303 | mask |= POLLRDHUP; | |
304 | ||
1da177e4 LT |
305 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
306 | mask |= POLLHUP; | |
307 | ||
8e87d142 | 308 | if (!skb_queue_empty(&sk->sk_receive_queue) || |
1da177e4 LT |
309 | (sk->sk_shutdown & RCV_SHUTDOWN)) |
310 | mask |= POLLIN | POLLRDNORM; | |
311 | ||
312 | if (sk->sk_state == BT_CLOSED) | |
313 | mask |= POLLHUP; | |
314 | ||
315 | if (sk->sk_state == BT_CONNECT || | |
316 | sk->sk_state == BT_CONNECT2 || | |
317 | sk->sk_state == BT_CONFIG) | |
318 | return mask; | |
319 | ||
320 | if (sock_writeable(sk)) | |
321 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; | |
322 | else | |
323 | set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); | |
324 | ||
325 | return mask; | |
326 | } | |
327 | EXPORT_SYMBOL(bt_sock_poll); | |
328 | ||
3241ad82 MH |
329 | int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
330 | { | |
331 | struct sock *sk = sock->sk; | |
43cbeee9 MH |
332 | struct sk_buff *skb; |
333 | long amount; | |
3241ad82 MH |
334 | int err; |
335 | ||
336 | BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg); | |
337 | ||
338 | switch (cmd) { | |
43cbeee9 MH |
339 | case TIOCOUTQ: |
340 | if (sk->sk_state == BT_LISTEN) | |
341 | return -EINVAL; | |
342 | ||
343 | amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); | |
344 | if (amount < 0) | |
345 | amount = 0; | |
346 | err = put_user(amount, (int __user *) arg); | |
347 | break; | |
348 | ||
349 | case TIOCINQ: | |
350 | if (sk->sk_state == BT_LISTEN) | |
351 | return -EINVAL; | |
352 | ||
353 | lock_sock(sk); | |
354 | skb = skb_peek(&sk->sk_receive_queue); | |
355 | amount = skb ? skb->len : 0; | |
356 | release_sock(sk); | |
357 | err = put_user(amount, (int __user *) arg); | |
358 | break; | |
359 | ||
3241ad82 MH |
360 | case SIOCGSTAMP: |
361 | err = sock_get_timestamp(sk, (struct timeval __user *) arg); | |
362 | break; | |
363 | ||
364 | case SIOCGSTAMPNS: | |
365 | err = sock_get_timestampns(sk, (struct timespec __user *) arg); | |
366 | break; | |
367 | ||
368 | default: | |
369 | err = -ENOIOCTLCMD; | |
370 | break; | |
371 | } | |
372 | ||
373 | return err; | |
374 | } | |
375 | EXPORT_SYMBOL(bt_sock_ioctl); | |
376 | ||
1da177e4 LT |
377 | int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo) |
378 | { | |
379 | DECLARE_WAITQUEUE(wait, current); | |
380 | int err = 0; | |
381 | ||
382 | BT_DBG("sk %p", sk); | |
383 | ||
384 | add_wait_queue(sk->sk_sleep, &wait); | |
385 | while (sk->sk_state != state) { | |
386 | set_current_state(TASK_INTERRUPTIBLE); | |
387 | ||
388 | if (!timeo) { | |
b4c612a4 | 389 | err = -EINPROGRESS; |
1da177e4 LT |
390 | break; |
391 | } | |
392 | ||
393 | if (signal_pending(current)) { | |
394 | err = sock_intr_errno(timeo); | |
395 | break; | |
396 | } | |
397 | ||
398 | release_sock(sk); | |
399 | timeo = schedule_timeout(timeo); | |
400 | lock_sock(sk); | |
401 | ||
c1cbe4b7 BL |
402 | err = sock_error(sk); |
403 | if (err) | |
1da177e4 | 404 | break; |
1da177e4 LT |
405 | } |
406 | set_current_state(TASK_RUNNING); | |
407 | remove_wait_queue(sk->sk_sleep, &wait); | |
408 | return err; | |
409 | } | |
410 | EXPORT_SYMBOL(bt_sock_wait_state); | |
411 | ||
412 | static struct net_proto_family bt_sock_family_ops = { | |
413 | .owner = THIS_MODULE, | |
414 | .family = PF_BLUETOOTH, | |
415 | .create = bt_sock_create, | |
416 | }; | |
417 | ||
1da177e4 LT |
418 | static int __init bt_init(void) |
419 | { | |
27d35284 MH |
420 | int err; |
421 | ||
1da177e4 LT |
422 | BT_INFO("Core ver %s", VERSION); |
423 | ||
27d35284 MH |
424 | err = bt_sysfs_init(); |
425 | if (err < 0) | |
426 | return err; | |
1da177e4 | 427 | |
27d35284 MH |
428 | err = sock_register(&bt_sock_family_ops); |
429 | if (err < 0) { | |
430 | bt_sysfs_cleanup(); | |
431 | return err; | |
432 | } | |
1da177e4 | 433 | |
27d35284 | 434 | BT_INFO("HCI device and connection manager initialized"); |
1da177e4 LT |
435 | |
436 | hci_sock_init(); | |
437 | ||
438 | return 0; | |
439 | } | |
440 | ||
441 | static void __exit bt_exit(void) | |
442 | { | |
443 | hci_sock_cleanup(); | |
444 | ||
1da177e4 | 445 | sock_unregister(PF_BLUETOOTH); |
27d35284 MH |
446 | |
447 | bt_sysfs_cleanup(); | |
1da177e4 LT |
448 | } |
449 | ||
450 | subsys_initcall(bt_init); | |
451 | module_exit(bt_exit); | |
452 | ||
63fbd24e | 453 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
454 | MODULE_DESCRIPTION("Bluetooth Core ver " VERSION); |
455 | MODULE_VERSION(VERSION); | |
456 | MODULE_LICENSE("GPL"); | |
457 | MODULE_ALIAS_NETPROTO(PF_BLUETOOTH); |