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 const 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 *const 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 *const 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, const 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 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,32))
130 static int bt_sock_create(struct net *net, struct socket *sock, int proto,
133 static int bt_sock_create(struct net *net, struct socket *sock, int proto)
138 if (net != &init_net)
139 return -EAFNOSUPPORT;
141 if (proto < 0 || proto >= BT_MAX_PROTO)
144 if (!bt_proto[proto])
145 request_module("bt-proto-%d", proto);
147 err = -EPROTONOSUPPORT;
149 read_lock(&bt_proto_lock);
151 if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) {
152 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,32))
153 err = bt_proto[proto]->create(net, sock, proto, kern);
155 err = bt_proto[proto]->create(net, sock, proto);
157 bt_sock_reclassify_lock(sock, proto);
158 module_put(bt_proto[proto]->owner);
161 read_unlock(&bt_proto_lock);
166 void bt_sock_link(struct bt_sock_list *l, struct sock *sk)
168 write_lock_bh(&l->lock);
169 sk_add_node(sk, &l->head);
170 write_unlock_bh(&l->lock);
172 EXPORT_SYMBOL(bt_sock_link);
174 void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk)
176 write_lock_bh(&l->lock);
177 sk_del_node_init(sk);
178 write_unlock_bh(&l->lock);
180 EXPORT_SYMBOL(bt_sock_unlink);
182 void bt_accept_enqueue(struct sock *parent, struct sock *sk)
184 BT_DBG("parent %p, sk %p", parent, sk);
187 list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q);
188 bt_sk(sk)->parent = parent;
189 parent->sk_ack_backlog++;
191 EXPORT_SYMBOL(bt_accept_enqueue);
193 void bt_accept_unlink(struct sock *sk)
195 BT_DBG("sk %p state %d", sk, sk->sk_state);
197 list_del_init(&bt_sk(sk)->accept_q);
198 bt_sk(sk)->parent->sk_ack_backlog--;
199 bt_sk(sk)->parent = NULL;
202 EXPORT_SYMBOL(bt_accept_unlink);
204 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock)
206 struct list_head *p, *n;
209 BT_DBG("parent %p", parent);
211 list_for_each_safe(p, n, &bt_sk(parent)->accept_q) {
212 sk = (struct sock *) list_entry(p, struct bt_sock, accept_q);
216 /* FIXME: Is this check still needed */
217 if (sk->sk_state == BT_CLOSED) {
219 bt_accept_unlink(sk);
223 if (sk->sk_state == BT_CONNECTED || !newsock ||
224 bt_sk(parent)->defer_setup) {
225 bt_accept_unlink(sk);
227 sock_graft(sk, newsock);
236 EXPORT_SYMBOL(bt_accept_dequeue);
238 int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
239 struct msghdr *msg, size_t len, int flags)
241 int noblock = flags & MSG_DONTWAIT;
242 struct sock *sk = sock->sk;
247 BT_DBG("sock %p sk %p len %zu", sock, sk, len);
249 if (flags & (MSG_OOB))
252 if (!(skb = skb_recv_datagram(sk, flags, noblock, &err))) {
253 if (sk->sk_shutdown & RCV_SHUTDOWN)
258 msg->msg_namelen = 0;
262 msg->msg_flags |= MSG_TRUNC;
266 skb_reset_transport_header(skb);
267 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
269 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,32))
270 sock_recv_ts_and_drops(msg, sk, skb);
272 sock_recv_timestamp(msg, sk, skb);
275 skb_free_datagram(sk, skb);
277 return err ? : copied;
279 EXPORT_SYMBOL(bt_sock_recvmsg);
281 static inline unsigned int bt_accept_poll(struct sock *parent)
283 struct list_head *p, *n;
286 list_for_each_safe(p, n, &bt_sk(parent)->accept_q) {
287 sk = (struct sock *) list_entry(p, struct bt_sock, accept_q);
288 if (sk->sk_state == BT_CONNECTED ||
289 (bt_sk(parent)->defer_setup &&
290 sk->sk_state == BT_CONNECT2))
291 return POLLIN | POLLRDNORM;
297 unsigned int bt_sock_poll(struct file * file, struct socket *sock, poll_table *wait)
299 struct sock *sk = sock->sk;
300 unsigned int mask = 0;
302 BT_DBG("sock %p, sk %p", sock, sk);
304 poll_wait(file, sk->sk_sleep, wait);
306 if (sk->sk_state == BT_LISTEN)
307 return bt_accept_poll(sk);
309 if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
312 if (sk->sk_shutdown & RCV_SHUTDOWN)
315 if (sk->sk_shutdown == SHUTDOWN_MASK)
318 if (!skb_queue_empty(&sk->sk_receive_queue) ||
319 (sk->sk_shutdown & RCV_SHUTDOWN))
320 mask |= POLLIN | POLLRDNORM;
322 if (sk->sk_state == BT_CLOSED)
325 if (sk->sk_state == BT_CONNECT ||
326 sk->sk_state == BT_CONNECT2 ||
327 sk->sk_state == BT_CONFIG)
330 if (sock_writeable(sk))
331 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
333 set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
337 EXPORT_SYMBOL(bt_sock_poll);
339 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
341 struct sock *sk = sock->sk;
346 BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg);
350 if (sk->sk_state == BT_LISTEN)
353 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,31))
354 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
356 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
360 err = put_user(amount, (int __user *) arg);
364 if (sk->sk_state == BT_LISTEN)
368 skb = skb_peek(&sk->sk_receive_queue);
369 amount = skb ? skb->len : 0;
371 err = put_user(amount, (int __user *) arg);
375 err = sock_get_timestamp(sk, (struct timeval __user *) arg);
379 err = sock_get_timestampns(sk, (struct timespec __user *) arg);
389 EXPORT_SYMBOL(bt_sock_ioctl);
391 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo)
393 DECLARE_WAITQUEUE(wait, current);
398 add_wait_queue(sk->sk_sleep, &wait);
399 while (sk->sk_state != state) {
400 set_current_state(TASK_INTERRUPTIBLE);
407 if (signal_pending(current)) {
408 err = sock_intr_errno(timeo);
413 timeo = schedule_timeout(timeo);
416 err = sock_error(sk);
420 set_current_state(TASK_RUNNING);
421 remove_wait_queue(sk->sk_sleep, &wait);
424 EXPORT_SYMBOL(bt_sock_wait_state);
426 static struct net_proto_family bt_sock_family_ops = {
427 .owner = THIS_MODULE,
428 .family = PF_BLUETOOTH,
429 .create = bt_sock_create,
432 static int __init bt_init(void)
436 BT_INFO("Core ver %s", VERSION);
438 err = bt_sysfs_init();
442 err = sock_register(&bt_sock_family_ops);
448 BT_INFO("HCI device and connection manager initialized");
455 static void __exit bt_exit(void)
459 sock_unregister(PF_BLUETOOTH);
464 subsys_initcall(bt_init);
465 module_exit(bt_exit);
467 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
468 MODULE_DESCRIPTION("Bluetooth Core ver " VERSION);
469 MODULE_VERSION(VERSION);
470 MODULE_LICENSE("GPL");
471 MODULE_ALIAS_NETPROTO(PF_BLUETOOTH);