1 /*
2 BNEP implementation for Linux Bluetooth stack (BlueZ).
3 Copyright (C) 2001-2002 Inventel Systemes
4 Written 2001-2002 by
5 David Libault <david.libault@inventel.fr>
6
7 Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License version 2 as
11 published by the Free Software Foundation;
12
13 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
14 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
16 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
17 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
18 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
19 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
20 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21
22 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
23 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
24 SOFTWARE IS DISCLAIMED.
25 */
26
27 #include <linux/compat.h>
28 #include <linux/export.h>
29 #include <linux/file.h>
30
31 #include "bnep.h"
32
33 static struct bt_sock_list bnep_sk_list = {
34 .lock = __RW_LOCK_UNLOCKED(bnep_sk_list.lock)
35 };
36
37 static int bnep_sock_release(struct socket *sock)
38 {
39 struct sock *sk = sock->sk;
40
41 BT_DBG("sock %p sk %p", sock, sk);
42
43 if (!sk)
44 return 0;
45
46 bt_sock_unlink(&bnep_sk_list, sk);
47
48 sock_orphan(sk);
49 sock_put(sk);
50 return 0;
51 }
52
53 static int do_bnep_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp)
54 {
55 struct bnep_connlist_req cl;
56 struct bnep_connadd_req ca;
57 struct bnep_conndel_req cd;
58 struct bnep_conninfo ci;
59 struct socket *nsock;
60 __u32 supp_feat = BIT(BNEP_SETUP_RESPONSE);
61 int err;
62
63 BT_DBG("cmd %x arg %p", cmd, argp);
64
65 switch (cmd) {
66 case BNEPCONNADD:
67 if (!capable(CAP_NET_ADMIN))
68 return -EPERM;
69
70 if (copy_from_user(&ca, argp, sizeof(ca)))
71 return -EFAULT;
72
73 nsock = sockfd_lookup(ca.sock, &err);
74 if (!nsock)
75 return err;
76
77 if (nsock->sk->sk_state != BT_CONNECTED) {
78 sockfd_put(nsock);
79 return -EBADFD;
80 }
81 ca.device[sizeof(ca.device)-1] = 0;
82
83 err = bnep_add_connection(&ca, nsock);
84 if (!err) {
85 if (copy_to_user(argp, &ca, sizeof(ca)))
86 err = -EFAULT;
87 } else
88 sockfd_put(nsock);
89
90 return err;
91
92 case BNEPCONNDEL:
93 if (!capable(CAP_NET_ADMIN))
94 return -EPERM;
95
96 if (copy_from_user(&cd, argp, sizeof(cd)))
97 return -EFAULT;
98
99 return bnep_del_connection(&cd);
100
101 case BNEPGETCONNLIST:
102 if (copy_from_user(&cl, argp, sizeof(cl)))
103 return -EFAULT;
104
105 if (cl.cnum <= 0)
106 return -EINVAL;
107
108 err = bnep_get_connlist(&cl);
109 if (!err && copy_to_user(argp, &cl, sizeof(cl)))
110 return -EFAULT;
111
112 return err;
113
114 case BNEPGETCONNINFO:
115 if (copy_from_user(&ci, argp, sizeof(ci)))
116 return -EFAULT;
117
118 err = bnep_get_conninfo(&ci);
119 if (!err && copy_to_user(argp, &ci, sizeof(ci)))
120 return -EFAULT;
121
122 return err;
123
124 case BNEPGETSUPPFEAT:
125 if (copy_to_user(argp, &supp_feat, sizeof(supp_feat)))
126 return -EFAULT;
127
128 return 0;
129
130 default:
131 return -EINVAL;
132 }
133
134 return 0;
135 }
136
137 static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
138 {
139 return do_bnep_sock_ioctl(sock, cmd, (void __user *)arg);
140 }
141
142 #ifdef CONFIG_COMPAT
143 static int bnep_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
144 {
145 void __user *argp = compat_ptr(arg);
146 if (cmd == BNEPGETCONNLIST) {
147 struct bnep_connlist_req cl;
148 unsigned __user *p = argp;
149 u32 uci;
150 int err;
151
152 if (get_user(cl.cnum, p) || get_user(uci, p + 1))
153 return -EFAULT;
154
155 cl.ci = compat_ptr(uci);
156
157 if (cl.cnum <= 0)
158 return -EINVAL;
159
160 err = bnep_get_connlist(&cl);
161
162 if (!err && put_user(cl.cnum, p))
163 err = -EFAULT;
164
165 return err;
166 }
167
168 return do_bnep_sock_ioctl(sock, cmd, argp);
169 }
170 #endif
171
172 static const struct proto_ops bnep_sock_ops = {
173 .family = PF_BLUETOOTH,
174 .owner = THIS_MODULE,
175 .release = bnep_sock_release,
176 .ioctl = bnep_sock_ioctl,
177 #ifdef CONFIG_COMPAT
178 .compat_ioctl = bnep_sock_compat_ioctl,
179 #endif
180 .bind = sock_no_bind,
181 .getname = sock_no_getname,
182 .sendmsg = sock_no_sendmsg,
183 .recvmsg = sock_no_recvmsg,
184 .listen = sock_no_listen,
185 .shutdown = sock_no_shutdown,
186 .connect = sock_no_connect,
187 .socketpair = sock_no_socketpair,
188 .accept = sock_no_accept,
189 .mmap = sock_no_mmap
190 };
191
192 static struct proto bnep_proto = {
193 .name = "BNEP",
194 .owner = THIS_MODULE,
195 .obj_size = sizeof(struct bt_sock)
196 };
197
198 static int bnep_sock_create(struct net *net, struct socket *sock, int protocol,
199 int kern)
200 {
201 struct sock *sk;
202
203 BT_DBG("sock %p", sock);
204
205 if (sock->type != SOCK_RAW)
206 return -ESOCKTNOSUPPORT;
207
208 sk = bt_sock_alloc(net, sock, &bnep_proto, protocol, GFP_ATOMIC, kern);
209 if (!sk)
210 return -ENOMEM;
211
212 sock->ops = &bnep_sock_ops;
213 sock->state = SS_UNCONNECTED;
214
215 bt_sock_link(&bnep_sk_list, sk);
216 return 0;
217 }
218
219 static const struct net_proto_family bnep_sock_family_ops = {
220 .family = PF_BLUETOOTH,
221 .owner = THIS_MODULE,
222 .create = bnep_sock_create
223 };
224
225 int __init bnep_sock_init(void)
226 {
227 int err;
228
229 err = proto_register(&bnep_proto, 0);
230 if (err < 0)
231 return err;
232
233 err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops);
234 if (err < 0) {
235 BT_ERR("Can't register BNEP socket");
236 goto error;
237 }
238
239 err = bt_procfs_init(&init_net, "bnep", &bnep_sk_list, NULL);
240 if (err < 0) {
241 BT_ERR("Failed to create BNEP proc file");
242 bt_sock_unregister(BTPROTO_BNEP);
243 goto error;
244 }
245
246 BT_INFO("BNEP socket layer initialized");
247
248 return 0;
249
250 error:
251 proto_unregister(&bnep_proto);
252 return err;
253 }
254
255 void __exit bnep_sock_cleanup(void)
256 {
257 bt_procfs_cleanup(&init_net, "bnep");
258 bt_sock_unregister(BTPROTO_BNEP);
259 proto_unregister(&bnep_proto);
260 }
261
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