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>
40 #if defined(CONFIG_KMOD)
41 #include <linux/kmod.h>
44 #include <net/bluetooth/bluetooth.h>
46 #ifndef CONFIG_BT_SOCK_DEBUG
51 #define VERSION "2.11"
53 /* Bluetooth sockets */
54 #define BT_MAX_PROTO 8
55 static struct net_proto_family *bt_proto[BT_MAX_PROTO];
56 static DEFINE_RWLOCK(bt_proto_lock);
58 int bt_sock_register(int proto, struct net_proto_family *ops)
62 if (proto < 0 || proto >= BT_MAX_PROTO)
65 write_lock(&bt_proto_lock);
70 bt_proto[proto] = ops;
72 write_unlock(&bt_proto_lock);
76 EXPORT_SYMBOL(bt_sock_register);
78 int bt_sock_unregister(int proto)
82 if (proto < 0 || proto >= BT_MAX_PROTO)
85 write_lock(&bt_proto_lock);
90 bt_proto[proto] = NULL;
92 write_unlock(&bt_proto_lock);
96 EXPORT_SYMBOL(bt_sock_unregister);
98 static int bt_sock_create(struct net *net, struct socket *sock, int proto)
102 if (net != &init_net)
103 return -EAFNOSUPPORT;
105 if (proto < 0 || proto >= BT_MAX_PROTO)
108 #if defined(CONFIG_KMOD)
109 if (!bt_proto[proto]) {
110 request_module("bt-proto-%d", proto);
114 err = -EPROTONOSUPPORT;
116 read_lock(&bt_proto_lock);
118 if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) {
119 err = bt_proto[proto]->create(net, sock, proto);
120 module_put(bt_proto[proto]->owner);
123 read_unlock(&bt_proto_lock);
128 void bt_sock_link(struct bt_sock_list *l, struct sock *sk)
130 write_lock_bh(&l->lock);
131 sk_add_node(sk, &l->head);
132 write_unlock_bh(&l->lock);
134 EXPORT_SYMBOL(bt_sock_link);
136 void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk)
138 write_lock_bh(&l->lock);
139 sk_del_node_init(sk);
140 write_unlock_bh(&l->lock);
142 EXPORT_SYMBOL(bt_sock_unlink);
144 void bt_accept_enqueue(struct sock *parent, struct sock *sk)
146 BT_DBG("parent %p, sk %p", parent, 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++;
153 EXPORT_SYMBOL(bt_accept_enqueue);
155 void bt_accept_unlink(struct sock *sk)
157 BT_DBG("sk %p state %d", sk, sk->sk_state);
159 list_del_init(&bt_sk(sk)->accept_q);
160 bt_sk(sk)->parent->sk_ack_backlog--;
161 bt_sk(sk)->parent = NULL;
164 EXPORT_SYMBOL(bt_accept_unlink);
166 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock)
168 struct list_head *p, *n;
171 BT_DBG("parent %p", parent);
173 list_for_each_safe(p, n, &bt_sk(parent)->accept_q) {
174 sk = (struct sock *) list_entry(p, struct bt_sock, accept_q);
178 /* FIXME: Is this check still needed */
179 if (sk->sk_state == BT_CLOSED) {
181 bt_accept_unlink(sk);
185 if (sk->sk_state == BT_CONNECTED || !newsock) {
186 bt_accept_unlink(sk);
188 sock_graft(sk, newsock);
197 EXPORT_SYMBOL(bt_accept_dequeue);
199 int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
200 struct msghdr *msg, size_t len, int flags)
202 int noblock = flags & MSG_DONTWAIT;
203 struct sock *sk = sock->sk;
208 BT_DBG("sock %p sk %p len %d", sock, sk, len);
210 if (flags & (MSG_OOB))
213 if (!(skb = skb_recv_datagram(sk, flags, noblock, &err))) {
214 if (sk->sk_shutdown & RCV_SHUTDOWN)
219 msg->msg_namelen = 0;
223 msg->msg_flags |= MSG_TRUNC;
227 skb_reset_transport_header(skb);
228 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
230 skb_free_datagram(sk, skb);
232 return err ? : copied;
234 EXPORT_SYMBOL(bt_sock_recvmsg);
236 static inline unsigned int bt_accept_poll(struct sock *parent)
238 struct list_head *p, *n;
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;
250 unsigned int bt_sock_poll(struct file * file, struct socket *sock, poll_table *wait)
252 struct sock *sk = sock->sk;
253 unsigned int mask = 0;
255 BT_DBG("sock %p, sk %p", sock, sk);
257 poll_wait(file, sk->sk_sleep, wait);
259 if (sk->sk_state == BT_LISTEN)
260 return bt_accept_poll(sk);
262 if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
265 if (sk->sk_shutdown & RCV_SHUTDOWN)
268 if (sk->sk_shutdown == SHUTDOWN_MASK)
271 if (!skb_queue_empty(&sk->sk_receive_queue) ||
272 (sk->sk_shutdown & RCV_SHUTDOWN))
273 mask |= POLLIN | POLLRDNORM;
275 if (sk->sk_state == BT_CLOSED)
278 if (sk->sk_state == BT_CONNECT ||
279 sk->sk_state == BT_CONNECT2 ||
280 sk->sk_state == BT_CONFIG)
283 if (sock_writeable(sk))
284 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
286 set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
290 EXPORT_SYMBOL(bt_sock_poll);
292 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo)
294 DECLARE_WAITQUEUE(wait, current);
299 add_wait_queue(sk->sk_sleep, &wait);
300 while (sk->sk_state != state) {
301 set_current_state(TASK_INTERRUPTIBLE);
308 if (signal_pending(current)) {
309 err = sock_intr_errno(timeo);
314 timeo = schedule_timeout(timeo);
317 err = sock_error(sk);
321 set_current_state(TASK_RUNNING);
322 remove_wait_queue(sk->sk_sleep, &wait);
325 EXPORT_SYMBOL(bt_sock_wait_state);
327 static struct net_proto_family bt_sock_family_ops = {
328 .owner = THIS_MODULE,
329 .family = PF_BLUETOOTH,
330 .create = bt_sock_create,
333 static int __init bt_init(void)
337 BT_INFO("Core ver %s", VERSION);
339 err = bt_sysfs_init();
343 err = sock_register(&bt_sock_family_ops);
349 BT_INFO("HCI device and connection manager initialized");
356 static void __exit bt_exit(void)
360 sock_unregister(PF_BLUETOOTH);
365 subsys_initcall(bt_init);
366 module_exit(bt_exit);
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);