File: /usr/src/linux/net/bluetooth/af_bluetooth.c
1 /*
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
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.
19
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.
23 */
24
25 /*
26 * BlueZ Bluetooth address family and sockets.
27 *
28 * $Id: af_bluetooth.c,v 1.4 2001/07/05 18:42:44 maxk Exp $
29 */
30 #define VERSION "1.1"
31
32 #include <linux/config.h>
33 #include <linux/module.h>
34
35 #include <linux/types.h>
36 #include <linux/errno.h>
37 #include <linux/kernel.h>
38 #include <linux/major.h>
39 #include <linux/sched.h>
40 #include <linux/slab.h>
41 #include <linux/skbuff.h>
42 #include <linux/init.h>
43 #include <linux/proc_fs.h>
44 #include <net/sock.h>
45
46 #if defined(CONFIG_KMOD)
47 #include <linux/kmod.h>
48 #endif
49
50 #include <net/bluetooth/bluetooth.h>
51 #include <net/bluetooth/bluez.h>
52
53 /* Bluetooth sockets */
54 static struct net_proto_family *bluez_sock[BLUEZ_MAX_PROTO];
55
56 int bluez_sock_register(int proto, struct net_proto_family *ops)
57 {
58 if (proto > BLUEZ_MAX_PROTO)
59 return -EINVAL;
60
61 if (bluez_sock[proto])
62 return -EEXIST;
63
64 bluez_sock[proto] = ops;
65 return 0;
66 }
67
68 int bluez_sock_unregister(int proto)
69 {
70 if (proto > BLUEZ_MAX_PROTO)
71 return -EINVAL;
72
73 if (!bluez_sock[proto])
74 return -ENOENT;
75
76 bluez_sock[proto] = NULL;
77 return 0;
78 }
79
80 static int bluez_sock_create(struct socket *sock, int proto)
81 {
82 if (proto > BLUEZ_MAX_PROTO)
83 return -EINVAL;
84
85 #if defined(CONFIG_KMOD)
86 if (!bluez_sock[proto]) {
87 char module_name[30];
88 sprintf(module_name, "bt-proto-%d", proto);
89 request_module(module_name);
90 }
91 #endif
92
93 if (!bluez_sock[proto])
94 return -ENOENT;
95
96 return bluez_sock[proto]->create(sock, proto);
97 }
98
99 void bluez_sock_link(struct bluez_sock_list *l, struct sock *sk)
100 {
101 write_lock(&l->lock);
102
103 sk->next = l->head;
104 l->head = sk;
105 sock_hold(sk);
106
107 write_unlock(&l->lock);
108 }
109
110 void bluez_sock_unlink(struct bluez_sock_list *l, struct sock *sk)
111 {
112 struct sock **skp;
113
114 write_lock(&l->lock);
115 for (skp = &l->head; *skp; skp = &((*skp)->next)) {
116 if (*skp == sk) {
117 *skp = sk->next;
118 __sock_put(sk);
119 break;
120 }
121 }
122 write_unlock(&l->lock);
123 }
124
125 struct net_proto_family bluez_sock_family_ops =
126 {
127 PF_BLUETOOTH, bluez_sock_create
128 };
129
130 int bluez_init(void)
131 {
132 INF("BlueZ HCI Core ver %s Copyright (C) 2000,2001 Qualcomm Inc",
133 VERSION);
134 INF("Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>");
135
136 proc_mkdir("bluetooth", NULL);
137
138 sock_register(&bluez_sock_family_ops);
139
140 /* Init HCI Core */
141 hci_core_init();
142
143 /* Init sockets */
144 hci_sock_init();
145
146 return 0;
147 }
148
149 void bluez_cleanup(void)
150 {
151 /* Release socket */
152 hci_sock_cleanup();
153
154 /* Release core */
155 hci_core_cleanup();
156
157 sock_unregister(PF_BLUETOOTH);
158
159 remove_proc_entry("bluetooth", NULL);
160 }
161
162 #ifdef MODULE
163 module_init(bluez_init);
164 module_exit(bluez_cleanup);
165
166 MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>");
167 MODULE_DESCRIPTION("BlueZ HCI Core ver " VERSION);
168 #endif
169