2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
5 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
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;
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
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
18 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
21 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
22 SOFTWARE IS DISCLAIMED.
25 /* Bluetooth address family and sockets. */
27 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/list.h>
31 #include <linux/errno.h>
32 #include <linux/kernel.h>
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>
39 #include <asm/ioctls.h>
40 #include <linux/kmod.h>
42 #include <net/bluetooth/bluetooth.h>
44 #define VERSION "2.15"
46 /* Bluetooth sockets */
47 #define BT_MAX_PROTO 8
48 static struct net_proto_family *bt_proto[BT_MAX_PROTO];
49 static DEFINE_RWLOCK(bt_proto_lock);
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",
63 static struct lock_class_key bt_slock_key[BT_MAX_PROTO];
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",
75 static inline void bt_sock_reclassify_lock(struct socket *sock, int proto)
77 struct sock *sk = sock->sk;
82 BUG_ON(sock_owned_by_user(sk));
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]);
89 int bt_sock_register(int proto, struct net_proto_family *ops)
93 if (proto < 0 || proto >= BT_MAX_PROTO)
96 write_lock(&bt_proto_lock);
101 bt_proto[proto] = ops;
103 write_unlock(&bt_proto_lock);
107 EXPORT_SYMBOL(bt_sock_register);
109 int bt_sock_unregister(int proto)
113 if (proto < 0 || proto >= BT_MAX_PROTO)
116 write_lock(&bt_proto_lock);
118 if (!bt_proto[proto])
121 bt_proto[proto] = NULL;
123 write_unlock(&bt_proto_lock);
127 EXPORT_SYMBOL(bt_sock_unregister);
129 static int bt_sock_create(struct net *net, struct socket *sock, int proto)
133 if (net != &init_net)
134 return -EAFNOSUPPORT;
136 if (proto < 0 || proto >= BT_MAX_PROTO)
139 if (!bt_proto[proto])
140 request_module("bt-proto-%d", proto);
142 err = -EPROTONOSUPPORT;
144 read_lock(&bt_proto_lock);
146 if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) {
147 err = bt_proto[proto]->create(net, sock, proto);
148 bt_sock_reclassify_lock(sock, proto);
149 module_put(bt_proto[proto]->owner);
152 read_unlock(&bt_proto_lock);
157 void bt_sock_link(struct bt_sock_list *l, struct sock *sk)
159 write_lock_bh(&l->lock);
160 sk_add_node(sk, &l->head);
161 write_unlock_bh(&l->lock);
163 EXPORT_SYMBOL(bt_sock_link);
165 void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk)
167 write_lock_bh(&l->lock);
168 sk_del_node_init(sk);
169 write_unlock_bh(&l->lock);
171 EXPORT_SYMBOL(bt_sock_unlink);
173 void bt_accept_enqueue(struct sock *parent, struct sock *sk)
175 BT_DBG("parent %p, sk %p", parent, 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++;
182 EXPORT_SYMBOL(bt_accept_enqueue);
184 void bt_accept_unlink(struct sock *sk)
186 BT_DBG("sk %p state %d", sk, sk->sk_state);
188 list_del_init(&bt_sk(sk)->accept_q);
189 bt_sk(sk)->parent->sk_ack_backlog--;
190 bt_sk(sk)->parent = NULL;
193 EXPORT_SYMBOL(bt_accept_unlink);
195 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock)
197 struct list_head *p, *n;
200 BT_DBG("parent %p", parent);
202 list_for_each_safe(p, n, &bt_sk(parent)->accept_q) {
203 sk = (struct sock *) list_entry(p, struct bt_sock, accept_q);
207 /* FIXME: Is this check still needed */
208 if (sk->sk_state == BT_CLOSED) {
210 bt_accept_unlink(sk);
214 if (sk->sk_state == BT_CONNECTED || !newsock ||
215 bt_sk(parent)->defer_setup) {
216 bt_accept_unlink(sk);
218 sock_graft(sk, newsock);
227 EXPORT_SYMBOL(bt_accept_dequeue);
229 int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
230 struct msghdr *msg, size_t len, int flags)
232 int noblock = flags & MSG_DONTWAIT;
233 struct sock *sk = sock->sk;
238 BT_DBG("sock %p sk %p len %zu", sock, sk, len);
240 if (flags & (MSG_OOB))
243 if (!(skb = skb_recv_datagram(sk, flags, noblock, &err))) {
244 if (sk->sk_shutdown & RCV_SHUTDOWN)
249 msg->msg_namelen = 0;
253 msg->msg_flags |= MSG_TRUNC;
257 skb_reset_transport_header(skb);
258 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
260 sock_recv_timestamp(msg, sk, skb);
262 skb_free_datagram(sk, skb);
264 return err ? : copied;
266 EXPORT_SYMBOL(bt_sock_recvmsg);
268 static inline unsigned int bt_accept_poll(struct sock *parent)
270 struct list_head *p, *n;
273 if (bt_sk(parent)->defer_setup)
274 return POLLIN | POLLRDNORM;
276 list_for_each_safe(p, n, &bt_sk(parent)->accept_q) {
277 sk = (struct sock *) list_entry(p, struct bt_sock, accept_q);
278 if (sk->sk_state == BT_CONNECTED)
279 return POLLIN | POLLRDNORM;
285 unsigned int bt_sock_poll(struct file * file, struct socket *sock, poll_table *wait)
287 struct sock *sk = sock->sk;
288 unsigned int mask = 0;
290 BT_DBG("sock %p, sk %p", sock, sk);
292 poll_wait(file, sk->sk_sleep, wait);
294 if (sk->sk_state == BT_LISTEN)
295 return bt_accept_poll(sk);
297 if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
300 if (sk->sk_shutdown & RCV_SHUTDOWN)
303 if (sk->sk_shutdown == SHUTDOWN_MASK)
306 if (!skb_queue_empty(&sk->sk_receive_queue) ||
307 (sk->sk_shutdown & RCV_SHUTDOWN))
308 mask |= POLLIN | POLLRDNORM;
310 if (sk->sk_state == BT_CLOSED)
313 if (sk->sk_state == BT_CONNECT ||
314 sk->sk_state == BT_CONNECT2 ||
315 sk->sk_state == BT_CONFIG)
318 if (sock_writeable(sk))
319 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
321 set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
325 EXPORT_SYMBOL(bt_sock_poll);
327 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
329 struct sock *sk = sock->sk;
334 BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg);
338 if (sk->sk_state == BT_LISTEN)
341 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
344 err = put_user(amount, (int __user *) arg);
348 if (sk->sk_state == BT_LISTEN)
352 skb = skb_peek(&sk->sk_receive_queue);
353 amount = skb ? skb->len : 0;
355 err = put_user(amount, (int __user *) arg);
359 err = sock_get_timestamp(sk, (struct timeval __user *) arg);
363 err = sock_get_timestampns(sk, (struct timespec __user *) arg);
373 EXPORT_SYMBOL(bt_sock_ioctl);
375 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo)
377 DECLARE_WAITQUEUE(wait, current);
382 add_wait_queue(sk->sk_sleep, &wait);
383 while (sk->sk_state != state) {
384 set_current_state(TASK_INTERRUPTIBLE);
391 if (signal_pending(current)) {
392 err = sock_intr_errno(timeo);
397 timeo = schedule_timeout(timeo);
400 err = sock_error(sk);
404 set_current_state(TASK_RUNNING);
405 remove_wait_queue(sk->sk_sleep, &wait);
408 EXPORT_SYMBOL(bt_sock_wait_state);
410 static struct net_proto_family bt_sock_family_ops = {
411 .owner = THIS_MODULE,
412 .family = PF_BLUETOOTH,
413 .create = bt_sock_create,
416 static int __init bt_init(void)
420 BT_INFO("Core ver %s", VERSION);
422 err = bt_sysfs_init();
426 err = sock_register(&bt_sock_family_ops);
432 BT_INFO("HCI device and connection manager initialized");
439 static void __exit bt_exit(void)
443 sock_unregister(PF_BLUETOOTH);
448 subsys_initcall(bt_init);
449 module_exit(bt_exit);
451 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
452 MODULE_DESCRIPTION("Bluetooth Core ver " VERSION);
453 MODULE_VERSION(VERSION);
454 MODULE_LICENSE("GPL");
455 MODULE_ALIAS_NETPROTO(PF_BLUETOOTH);