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/config.h>
28 #include <linux/module.h>
30 #include <linux/types.h>
31 #include <linux/list.h>
32 #include <linux/errno.h>
33 #include <linux/kernel.h>
34 #include <linux/sched.h>
35 #include <linux/slab.h>
36 #include <linux/skbuff.h>
37 #include <linux/init.h>
38 #include <linux/poll.h>
41 #if defined(CONFIG_KMOD)
42 #include <linux/kmod.h>
45 #include <net/bluetooth/bluetooth.h>
47 #ifndef CONFIG_BT_SOCK_DEBUG
54 /* Bluetooth sockets */
55 #define BT_MAX_PROTO 8
56 static struct net_proto_family *bt_proto[BT_MAX_PROTO];
58 int bt_sock_register(int proto, struct net_proto_family *ops)
60 if (proto < 0 || proto >= BT_MAX_PROTO)
66 bt_proto[proto] = ops;
69 EXPORT_SYMBOL(bt_sock_register);
71 int bt_sock_unregister(int proto)
73 if (proto < 0 || proto >= BT_MAX_PROTO)
79 bt_proto[proto] = NULL;
82 EXPORT_SYMBOL(bt_sock_unregister);
84 static int bt_sock_create(struct socket *sock, int proto)
88 if (proto < 0 || proto >= BT_MAX_PROTO)
91 #if defined(CONFIG_KMOD)
92 if (!bt_proto[proto]) {
93 request_module("bt-proto-%d", proto);
96 err = -EPROTONOSUPPORT;
97 if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) {
98 err = bt_proto[proto]->create(sock, proto);
99 module_put(bt_proto[proto]->owner);
104 void bt_sock_link(struct bt_sock_list *l, struct sock *sk)
106 write_lock_bh(&l->lock);
107 sk_add_node(sk, &l->head);
108 write_unlock_bh(&l->lock);
110 EXPORT_SYMBOL(bt_sock_link);
112 void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk)
114 write_lock_bh(&l->lock);
115 sk_del_node_init(sk);
116 write_unlock_bh(&l->lock);
118 EXPORT_SYMBOL(bt_sock_unlink);
120 void bt_accept_enqueue(struct sock *parent, struct sock *sk)
122 BT_DBG("parent %p, sk %p", parent, sk);
125 list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q);
126 bt_sk(sk)->parent = parent;
127 parent->sk_ack_backlog++;
129 EXPORT_SYMBOL(bt_accept_enqueue);
131 void bt_accept_unlink(struct sock *sk)
133 BT_DBG("sk %p state %d", sk, sk->sk_state);
135 list_del_init(&bt_sk(sk)->accept_q);
136 bt_sk(sk)->parent->sk_ack_backlog--;
137 bt_sk(sk)->parent = NULL;
140 EXPORT_SYMBOL(bt_accept_unlink);
142 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock)
144 struct list_head *p, *n;
147 BT_DBG("parent %p", parent);
149 list_for_each_safe(p, n, &bt_sk(parent)->accept_q) {
150 sk = (struct sock *) list_entry(p, struct bt_sock, accept_q);
154 /* FIXME: Is this check still needed */
155 if (sk->sk_state == BT_CLOSED) {
157 bt_accept_unlink(sk);
161 if (sk->sk_state == BT_CONNECTED || !newsock) {
162 bt_accept_unlink(sk);
164 sock_graft(sk, newsock);
173 EXPORT_SYMBOL(bt_accept_dequeue);
175 int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
176 struct msghdr *msg, size_t len, int flags)
178 int noblock = flags & MSG_DONTWAIT;
179 struct sock *sk = sock->sk;
184 BT_DBG("sock %p sk %p len %d", sock, sk, len);
186 if (flags & (MSG_OOB))
189 if (!(skb = skb_recv_datagram(sk, flags, noblock, &err))) {
190 if (sk->sk_shutdown & RCV_SHUTDOWN)
195 msg->msg_namelen = 0;
199 msg->msg_flags |= MSG_TRUNC;
203 skb->h.raw = skb->data;
204 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
206 skb_free_datagram(sk, skb);
208 return err ? : copied;
210 EXPORT_SYMBOL(bt_sock_recvmsg);
212 static inline unsigned int bt_accept_poll(struct sock *parent)
214 struct list_head *p, *n;
217 list_for_each_safe(p, n, &bt_sk(parent)->accept_q) {
218 sk = (struct sock *) list_entry(p, struct bt_sock, accept_q);
219 if (sk->sk_state == BT_CONNECTED)
220 return POLLIN | POLLRDNORM;
226 unsigned int bt_sock_poll(struct file * file, struct socket *sock, poll_table *wait)
228 struct sock *sk = sock->sk;
229 unsigned int mask = 0;
231 BT_DBG("sock %p, sk %p", sock, sk);
233 poll_wait(file, sk->sk_sleep, wait);
235 if (sk->sk_state == BT_LISTEN)
236 return bt_accept_poll(sk);
238 if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
241 if (sk->sk_shutdown == SHUTDOWN_MASK)
244 if (!skb_queue_empty(&sk->sk_receive_queue) ||
245 (sk->sk_shutdown & RCV_SHUTDOWN))
246 mask |= POLLIN | POLLRDNORM;
248 if (sk->sk_state == BT_CLOSED)
251 if (sk->sk_state == BT_CONNECT ||
252 sk->sk_state == BT_CONNECT2 ||
253 sk->sk_state == BT_CONFIG)
256 if (sock_writeable(sk))
257 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
259 set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
263 EXPORT_SYMBOL(bt_sock_poll);
265 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo)
267 DECLARE_WAITQUEUE(wait, current);
272 add_wait_queue(sk->sk_sleep, &wait);
273 while (sk->sk_state != state) {
274 set_current_state(TASK_INTERRUPTIBLE);
281 if (signal_pending(current)) {
282 err = sock_intr_errno(timeo);
287 timeo = schedule_timeout(timeo);
291 err = sock_error(sk);
295 set_current_state(TASK_RUNNING);
296 remove_wait_queue(sk->sk_sleep, &wait);
299 EXPORT_SYMBOL(bt_sock_wait_state);
301 static struct net_proto_family bt_sock_family_ops = {
302 .owner = THIS_MODULE,
303 .family = PF_BLUETOOTH,
304 .create = bt_sock_create,
307 static int __init bt_init(void)
309 BT_INFO("Core ver %s", VERSION);
311 sock_register(&bt_sock_family_ops);
313 BT_INFO("HCI device and connection manager initialized");
322 static void __exit bt_exit(void)
328 sock_unregister(PF_BLUETOOTH);
331 subsys_initcall(bt_init);
332 module_exit(bt_exit);
334 MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>");
335 MODULE_DESCRIPTION("Bluetooth Core ver " VERSION);
336 MODULE_VERSION(VERSION);
337 MODULE_LICENSE("GPL");
338 MODULE_ALIAS_NETPROTO(PF_BLUETOOTH);