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 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 LT |
38 | #include <net/sock.h> |
39 | ||
40 | #if defined(CONFIG_KMOD) | |
41 | #include <linux/kmod.h> | |
42 | #endif | |
43 | ||
44 | #include <net/bluetooth/bluetooth.h> | |
45 | ||
46 | #ifndef CONFIG_BT_SOCK_DEBUG | |
47 | #undef BT_DBG | |
48 | #define BT_DBG(D...) | |
49 | #endif | |
50 | ||
4c67bc74 | 51 | #define VERSION "2.11" |
1da177e4 LT |
52 | |
53 | /* Bluetooth sockets */ | |
54 | #define BT_MAX_PROTO 8 | |
55 | static struct net_proto_family *bt_proto[BT_MAX_PROTO]; | |
74da626a | 56 | static DEFINE_RWLOCK(bt_proto_lock); |
1da177e4 LT |
57 | |
58 | int bt_sock_register(int proto, struct net_proto_family *ops) | |
59 | { | |
74da626a MH |
60 | int err = 0; |
61 | ||
1da177e4 LT |
62 | if (proto < 0 || proto >= BT_MAX_PROTO) |
63 | return -EINVAL; | |
64 | ||
74da626a MH |
65 | write_lock(&bt_proto_lock); |
66 | ||
1da177e4 | 67 | if (bt_proto[proto]) |
74da626a MH |
68 | err = -EEXIST; |
69 | else | |
70 | bt_proto[proto] = ops; | |
71 | ||
72 | write_unlock(&bt_proto_lock); | |
1da177e4 | 73 | |
74da626a | 74 | return err; |
1da177e4 LT |
75 | } |
76 | EXPORT_SYMBOL(bt_sock_register); | |
77 | ||
78 | int bt_sock_unregister(int proto) | |
79 | { | |
74da626a MH |
80 | int err = 0; |
81 | ||
1da177e4 LT |
82 | if (proto < 0 || proto >= BT_MAX_PROTO) |
83 | return -EINVAL; | |
84 | ||
74da626a MH |
85 | write_lock(&bt_proto_lock); |
86 | ||
1da177e4 | 87 | if (!bt_proto[proto]) |
74da626a MH |
88 | err = -ENOENT; |
89 | else | |
90 | bt_proto[proto] = NULL; | |
1da177e4 | 91 | |
74da626a MH |
92 | write_unlock(&bt_proto_lock); |
93 | ||
94 | return err; | |
1da177e4 LT |
95 | } |
96 | EXPORT_SYMBOL(bt_sock_unregister); | |
97 | ||
98 | static int bt_sock_create(struct socket *sock, int proto) | |
99 | { | |
74da626a | 100 | int err; |
1da177e4 LT |
101 | |
102 | if (proto < 0 || proto >= BT_MAX_PROTO) | |
103 | return -EINVAL; | |
104 | ||
105 | #if defined(CONFIG_KMOD) | |
106 | if (!bt_proto[proto]) { | |
107 | request_module("bt-proto-%d", proto); | |
108 | } | |
109 | #endif | |
74da626a | 110 | |
1da177e4 | 111 | err = -EPROTONOSUPPORT; |
74da626a MH |
112 | |
113 | read_lock(&bt_proto_lock); | |
114 | ||
1da177e4 LT |
115 | if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) { |
116 | err = bt_proto[proto]->create(sock, proto); | |
117 | module_put(bt_proto[proto]->owner); | |
118 | } | |
74da626a MH |
119 | |
120 | read_unlock(&bt_proto_lock); | |
121 | ||
8e87d142 | 122 | return err; |
1da177e4 LT |
123 | } |
124 | ||
125 | void bt_sock_link(struct bt_sock_list *l, struct sock *sk) | |
126 | { | |
127 | write_lock_bh(&l->lock); | |
128 | sk_add_node(sk, &l->head); | |
129 | write_unlock_bh(&l->lock); | |
130 | } | |
131 | EXPORT_SYMBOL(bt_sock_link); | |
132 | ||
133 | void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk) | |
134 | { | |
135 | write_lock_bh(&l->lock); | |
136 | sk_del_node_init(sk); | |
137 | write_unlock_bh(&l->lock); | |
138 | } | |
139 | EXPORT_SYMBOL(bt_sock_unlink); | |
140 | ||
141 | void bt_accept_enqueue(struct sock *parent, struct sock *sk) | |
142 | { | |
143 | BT_DBG("parent %p, sk %p", parent, sk); | |
144 | ||
145 | sock_hold(sk); | |
146 | list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q); | |
147 | bt_sk(sk)->parent = parent; | |
148 | parent->sk_ack_backlog++; | |
149 | } | |
150 | EXPORT_SYMBOL(bt_accept_enqueue); | |
151 | ||
152 | void bt_accept_unlink(struct sock *sk) | |
153 | { | |
154 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
155 | ||
156 | list_del_init(&bt_sk(sk)->accept_q); | |
157 | bt_sk(sk)->parent->sk_ack_backlog--; | |
158 | bt_sk(sk)->parent = NULL; | |
159 | sock_put(sk); | |
160 | } | |
161 | EXPORT_SYMBOL(bt_accept_unlink); | |
162 | ||
163 | struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock) | |
164 | { | |
165 | struct list_head *p, *n; | |
166 | struct sock *sk; | |
167 | ||
168 | BT_DBG("parent %p", parent); | |
169 | ||
170 | list_for_each_safe(p, n, &bt_sk(parent)->accept_q) { | |
171 | sk = (struct sock *) list_entry(p, struct bt_sock, accept_q); | |
172 | ||
173 | lock_sock(sk); | |
174 | ||
175 | /* FIXME: Is this check still needed */ | |
176 | if (sk->sk_state == BT_CLOSED) { | |
177 | release_sock(sk); | |
178 | bt_accept_unlink(sk); | |
179 | continue; | |
180 | } | |
181 | ||
182 | if (sk->sk_state == BT_CONNECTED || !newsock) { | |
183 | bt_accept_unlink(sk); | |
184 | if (newsock) | |
185 | sock_graft(sk, newsock); | |
186 | release_sock(sk); | |
187 | return sk; | |
188 | } | |
189 | ||
190 | release_sock(sk); | |
191 | } | |
192 | return NULL; | |
193 | } | |
194 | EXPORT_SYMBOL(bt_accept_dequeue); | |
195 | ||
196 | int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock, | |
197 | struct msghdr *msg, size_t len, int flags) | |
198 | { | |
199 | int noblock = flags & MSG_DONTWAIT; | |
200 | struct sock *sk = sock->sk; | |
201 | struct sk_buff *skb; | |
202 | size_t copied; | |
203 | int err; | |
204 | ||
205 | BT_DBG("sock %p sk %p len %d", sock, sk, len); | |
206 | ||
207 | if (flags & (MSG_OOB)) | |
208 | return -EOPNOTSUPP; | |
209 | ||
210 | if (!(skb = skb_recv_datagram(sk, flags, noblock, &err))) { | |
211 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
212 | return 0; | |
213 | return err; | |
214 | } | |
215 | ||
216 | msg->msg_namelen = 0; | |
217 | ||
218 | copied = skb->len; | |
219 | if (len < copied) { | |
220 | msg->msg_flags |= MSG_TRUNC; | |
221 | copied = len; | |
222 | } | |
223 | ||
224 | skb->h.raw = skb->data; | |
225 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
226 | ||
227 | skb_free_datagram(sk, skb); | |
228 | ||
229 | return err ? : copied; | |
230 | } | |
231 | EXPORT_SYMBOL(bt_sock_recvmsg); | |
232 | ||
233 | static inline unsigned int bt_accept_poll(struct sock *parent) | |
234 | { | |
235 | struct list_head *p, *n; | |
236 | struct sock *sk; | |
237 | ||
238 | list_for_each_safe(p, n, &bt_sk(parent)->accept_q) { | |
239 | sk = (struct sock *) list_entry(p, struct bt_sock, accept_q); | |
240 | if (sk->sk_state == BT_CONNECTED) | |
241 | return POLLIN | POLLRDNORM; | |
242 | } | |
243 | ||
244 | return 0; | |
245 | } | |
246 | ||
247 | unsigned int bt_sock_poll(struct file * file, struct socket *sock, poll_table *wait) | |
248 | { | |
249 | struct sock *sk = sock->sk; | |
250 | unsigned int mask = 0; | |
251 | ||
252 | BT_DBG("sock %p, sk %p", sock, sk); | |
253 | ||
254 | poll_wait(file, sk->sk_sleep, wait); | |
255 | ||
256 | if (sk->sk_state == BT_LISTEN) | |
257 | return bt_accept_poll(sk); | |
258 | ||
259 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
260 | mask |= POLLERR; | |
261 | ||
f348d70a DL |
262 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
263 | mask |= POLLRDHUP; | |
264 | ||
1da177e4 LT |
265 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
266 | mask |= POLLHUP; | |
267 | ||
8e87d142 | 268 | if (!skb_queue_empty(&sk->sk_receive_queue) || |
1da177e4 LT |
269 | (sk->sk_shutdown & RCV_SHUTDOWN)) |
270 | mask |= POLLIN | POLLRDNORM; | |
271 | ||
272 | if (sk->sk_state == BT_CLOSED) | |
273 | mask |= POLLHUP; | |
274 | ||
275 | if (sk->sk_state == BT_CONNECT || | |
276 | sk->sk_state == BT_CONNECT2 || | |
277 | sk->sk_state == BT_CONFIG) | |
278 | return mask; | |
279 | ||
280 | if (sock_writeable(sk)) | |
281 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; | |
282 | else | |
283 | set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); | |
284 | ||
285 | return mask; | |
286 | } | |
287 | EXPORT_SYMBOL(bt_sock_poll); | |
288 | ||
289 | int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo) | |
290 | { | |
291 | DECLARE_WAITQUEUE(wait, current); | |
292 | int err = 0; | |
293 | ||
294 | BT_DBG("sk %p", sk); | |
295 | ||
296 | add_wait_queue(sk->sk_sleep, &wait); | |
297 | while (sk->sk_state != state) { | |
298 | set_current_state(TASK_INTERRUPTIBLE); | |
299 | ||
300 | if (!timeo) { | |
b4c612a4 | 301 | err = -EINPROGRESS; |
1da177e4 LT |
302 | break; |
303 | } | |
304 | ||
305 | if (signal_pending(current)) { | |
306 | err = sock_intr_errno(timeo); | |
307 | break; | |
308 | } | |
309 | ||
310 | release_sock(sk); | |
311 | timeo = schedule_timeout(timeo); | |
312 | lock_sock(sk); | |
313 | ||
c1cbe4b7 BL |
314 | err = sock_error(sk); |
315 | if (err) | |
1da177e4 | 316 | break; |
1da177e4 LT |
317 | } |
318 | set_current_state(TASK_RUNNING); | |
319 | remove_wait_queue(sk->sk_sleep, &wait); | |
320 | return err; | |
321 | } | |
322 | EXPORT_SYMBOL(bt_sock_wait_state); | |
323 | ||
324 | static struct net_proto_family bt_sock_family_ops = { | |
325 | .owner = THIS_MODULE, | |
326 | .family = PF_BLUETOOTH, | |
327 | .create = bt_sock_create, | |
328 | }; | |
329 | ||
1da177e4 LT |
330 | static int __init bt_init(void) |
331 | { | |
27d35284 MH |
332 | int err; |
333 | ||
1da177e4 LT |
334 | BT_INFO("Core ver %s", VERSION); |
335 | ||
27d35284 MH |
336 | err = bt_sysfs_init(); |
337 | if (err < 0) | |
338 | return err; | |
1da177e4 | 339 | |
27d35284 MH |
340 | err = sock_register(&bt_sock_family_ops); |
341 | if (err < 0) { | |
342 | bt_sysfs_cleanup(); | |
343 | return err; | |
344 | } | |
1da177e4 | 345 | |
27d35284 | 346 | BT_INFO("HCI device and connection manager initialized"); |
1da177e4 LT |
347 | |
348 | hci_sock_init(); | |
349 | ||
350 | return 0; | |
351 | } | |
352 | ||
353 | static void __exit bt_exit(void) | |
354 | { | |
355 | hci_sock_cleanup(); | |
356 | ||
1da177e4 | 357 | sock_unregister(PF_BLUETOOTH); |
27d35284 MH |
358 | |
359 | bt_sysfs_cleanup(); | |
1da177e4 LT |
360 | } |
361 | ||
362 | subsys_initcall(bt_init); | |
363 | module_exit(bt_exit); | |
364 | ||
365 | MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>"); | |
366 | MODULE_DESCRIPTION("Bluetooth Core ver " VERSION); | |
367 | MODULE_VERSION(VERSION); | |
368 | MODULE_LICENSE("GPL"); | |
369 | MODULE_ALIAS_NETPROTO(PF_BLUETOOTH); |