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 | ||
1b8d7ae4 | 98 | static int bt_sock_create(struct net *net, struct socket *sock, int proto) |
1da177e4 | 99 | { |
74da626a | 100 | int err; |
1da177e4 | 101 | |
1b8d7ae4 EB |
102 | if (net != &init_net) |
103 | return -EAFNOSUPPORT; | |
104 | ||
1da177e4 LT |
105 | if (proto < 0 || proto >= BT_MAX_PROTO) |
106 | return -EINVAL; | |
107 | ||
108 | #if defined(CONFIG_KMOD) | |
109 | if (!bt_proto[proto]) { | |
110 | request_module("bt-proto-%d", proto); | |
111 | } | |
112 | #endif | |
74da626a | 113 | |
1da177e4 | 114 | err = -EPROTONOSUPPORT; |
74da626a MH |
115 | |
116 | read_lock(&bt_proto_lock); | |
117 | ||
1da177e4 | 118 | if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) { |
1b8d7ae4 | 119 | err = bt_proto[proto]->create(net, sock, proto); |
1da177e4 LT |
120 | module_put(bt_proto[proto]->owner); |
121 | } | |
74da626a MH |
122 | |
123 | read_unlock(&bt_proto_lock); | |
124 | ||
8e87d142 | 125 | return err; |
1da177e4 LT |
126 | } |
127 | ||
128 | void bt_sock_link(struct bt_sock_list *l, struct sock *sk) | |
129 | { | |
130 | write_lock_bh(&l->lock); | |
131 | sk_add_node(sk, &l->head); | |
132 | write_unlock_bh(&l->lock); | |
133 | } | |
134 | EXPORT_SYMBOL(bt_sock_link); | |
135 | ||
136 | void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk) | |
137 | { | |
138 | write_lock_bh(&l->lock); | |
139 | sk_del_node_init(sk); | |
140 | write_unlock_bh(&l->lock); | |
141 | } | |
142 | EXPORT_SYMBOL(bt_sock_unlink); | |
143 | ||
144 | void bt_accept_enqueue(struct sock *parent, struct sock *sk) | |
145 | { | |
146 | BT_DBG("parent %p, sk %p", parent, sk); | |
147 | ||
148 | sock_hold(sk); | |
149 | list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q); | |
150 | bt_sk(sk)->parent = parent; | |
151 | parent->sk_ack_backlog++; | |
152 | } | |
153 | EXPORT_SYMBOL(bt_accept_enqueue); | |
154 | ||
155 | void bt_accept_unlink(struct sock *sk) | |
156 | { | |
157 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
158 | ||
159 | list_del_init(&bt_sk(sk)->accept_q); | |
160 | bt_sk(sk)->parent->sk_ack_backlog--; | |
161 | bt_sk(sk)->parent = NULL; | |
162 | sock_put(sk); | |
163 | } | |
164 | EXPORT_SYMBOL(bt_accept_unlink); | |
165 | ||
166 | struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock) | |
167 | { | |
168 | struct list_head *p, *n; | |
169 | struct sock *sk; | |
170 | ||
171 | BT_DBG("parent %p", parent); | |
172 | ||
173 | list_for_each_safe(p, n, &bt_sk(parent)->accept_q) { | |
174 | sk = (struct sock *) list_entry(p, struct bt_sock, accept_q); | |
175 | ||
176 | lock_sock(sk); | |
177 | ||
178 | /* FIXME: Is this check still needed */ | |
179 | if (sk->sk_state == BT_CLOSED) { | |
180 | release_sock(sk); | |
181 | bt_accept_unlink(sk); | |
182 | continue; | |
183 | } | |
184 | ||
185 | if (sk->sk_state == BT_CONNECTED || !newsock) { | |
186 | bt_accept_unlink(sk); | |
187 | if (newsock) | |
188 | sock_graft(sk, newsock); | |
189 | release_sock(sk); | |
190 | return sk; | |
191 | } | |
192 | ||
193 | release_sock(sk); | |
194 | } | |
195 | return NULL; | |
196 | } | |
197 | EXPORT_SYMBOL(bt_accept_dequeue); | |
198 | ||
199 | int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock, | |
200 | struct msghdr *msg, size_t len, int flags) | |
201 | { | |
202 | int noblock = flags & MSG_DONTWAIT; | |
203 | struct sock *sk = sock->sk; | |
204 | struct sk_buff *skb; | |
205 | size_t copied; | |
206 | int err; | |
207 | ||
208 | BT_DBG("sock %p sk %p len %d", sock, sk, len); | |
209 | ||
210 | if (flags & (MSG_OOB)) | |
211 | return -EOPNOTSUPP; | |
212 | ||
213 | if (!(skb = skb_recv_datagram(sk, flags, noblock, &err))) { | |
214 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
215 | return 0; | |
216 | return err; | |
217 | } | |
218 | ||
219 | msg->msg_namelen = 0; | |
220 | ||
221 | copied = skb->len; | |
222 | if (len < copied) { | |
223 | msg->msg_flags |= MSG_TRUNC; | |
224 | copied = len; | |
225 | } | |
226 | ||
badff6d0 | 227 | skb_reset_transport_header(skb); |
1da177e4 LT |
228 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
229 | ||
230 | skb_free_datagram(sk, skb); | |
231 | ||
232 | return err ? : copied; | |
233 | } | |
234 | EXPORT_SYMBOL(bt_sock_recvmsg); | |
235 | ||
236 | static inline unsigned int bt_accept_poll(struct sock *parent) | |
237 | { | |
238 | struct list_head *p, *n; | |
239 | struct sock *sk; | |
240 | ||
241 | list_for_each_safe(p, n, &bt_sk(parent)->accept_q) { | |
242 | sk = (struct sock *) list_entry(p, struct bt_sock, accept_q); | |
243 | if (sk->sk_state == BT_CONNECTED) | |
244 | return POLLIN | POLLRDNORM; | |
245 | } | |
246 | ||
247 | return 0; | |
248 | } | |
249 | ||
250 | unsigned int bt_sock_poll(struct file * file, struct socket *sock, poll_table *wait) | |
251 | { | |
252 | struct sock *sk = sock->sk; | |
253 | unsigned int mask = 0; | |
254 | ||
255 | BT_DBG("sock %p, sk %p", sock, sk); | |
256 | ||
257 | poll_wait(file, sk->sk_sleep, wait); | |
258 | ||
259 | if (sk->sk_state == BT_LISTEN) | |
260 | return bt_accept_poll(sk); | |
261 | ||
262 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
263 | mask |= POLLERR; | |
264 | ||
f348d70a DL |
265 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
266 | mask |= POLLRDHUP; | |
267 | ||
1da177e4 LT |
268 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
269 | mask |= POLLHUP; | |
270 | ||
8e87d142 | 271 | if (!skb_queue_empty(&sk->sk_receive_queue) || |
1da177e4 LT |
272 | (sk->sk_shutdown & RCV_SHUTDOWN)) |
273 | mask |= POLLIN | POLLRDNORM; | |
274 | ||
275 | if (sk->sk_state == BT_CLOSED) | |
276 | mask |= POLLHUP; | |
277 | ||
278 | if (sk->sk_state == BT_CONNECT || | |
279 | sk->sk_state == BT_CONNECT2 || | |
280 | sk->sk_state == BT_CONFIG) | |
281 | return mask; | |
282 | ||
283 | if (sock_writeable(sk)) | |
284 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; | |
285 | else | |
286 | set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); | |
287 | ||
288 | return mask; | |
289 | } | |
290 | EXPORT_SYMBOL(bt_sock_poll); | |
291 | ||
292 | int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo) | |
293 | { | |
294 | DECLARE_WAITQUEUE(wait, current); | |
295 | int err = 0; | |
296 | ||
297 | BT_DBG("sk %p", sk); | |
298 | ||
299 | add_wait_queue(sk->sk_sleep, &wait); | |
300 | while (sk->sk_state != state) { | |
301 | set_current_state(TASK_INTERRUPTIBLE); | |
302 | ||
303 | if (!timeo) { | |
b4c612a4 | 304 | err = -EINPROGRESS; |
1da177e4 LT |
305 | break; |
306 | } | |
307 | ||
308 | if (signal_pending(current)) { | |
309 | err = sock_intr_errno(timeo); | |
310 | break; | |
311 | } | |
312 | ||
313 | release_sock(sk); | |
314 | timeo = schedule_timeout(timeo); | |
315 | lock_sock(sk); | |
316 | ||
c1cbe4b7 BL |
317 | err = sock_error(sk); |
318 | if (err) | |
1da177e4 | 319 | break; |
1da177e4 LT |
320 | } |
321 | set_current_state(TASK_RUNNING); | |
322 | remove_wait_queue(sk->sk_sleep, &wait); | |
323 | return err; | |
324 | } | |
325 | EXPORT_SYMBOL(bt_sock_wait_state); | |
326 | ||
327 | static struct net_proto_family bt_sock_family_ops = { | |
328 | .owner = THIS_MODULE, | |
329 | .family = PF_BLUETOOTH, | |
330 | .create = bt_sock_create, | |
331 | }; | |
332 | ||
1da177e4 LT |
333 | static int __init bt_init(void) |
334 | { | |
27d35284 MH |
335 | int err; |
336 | ||
1da177e4 LT |
337 | BT_INFO("Core ver %s", VERSION); |
338 | ||
27d35284 MH |
339 | err = bt_sysfs_init(); |
340 | if (err < 0) | |
341 | return err; | |
1da177e4 | 342 | |
27d35284 MH |
343 | err = sock_register(&bt_sock_family_ops); |
344 | if (err < 0) { | |
345 | bt_sysfs_cleanup(); | |
346 | return err; | |
347 | } | |
1da177e4 | 348 | |
27d35284 | 349 | BT_INFO("HCI device and connection manager initialized"); |
1da177e4 LT |
350 | |
351 | hci_sock_init(); | |
352 | ||
353 | return 0; | |
354 | } | |
355 | ||
356 | static void __exit bt_exit(void) | |
357 | { | |
358 | hci_sock_cleanup(); | |
359 | ||
1da177e4 | 360 | sock_unregister(PF_BLUETOOTH); |
27d35284 MH |
361 | |
362 | bt_sysfs_cleanup(); | |
1da177e4 LT |
363 | } |
364 | ||
365 | subsys_initcall(bt_init); | |
366 | module_exit(bt_exit); | |
367 | ||
368 | MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>"); | |
369 | MODULE_DESCRIPTION("Bluetooth Core ver " VERSION); | |
370 | MODULE_VERSION(VERSION); | |
371 | MODULE_LICENSE("GPL"); | |
372 | MODULE_ALIAS_NETPROTO(PF_BLUETOOTH); |