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/export.h>
28 #include <linux/file.h>
29
30 #include "bnep.h"
31
32 static struct bt_sock_list bnep_sk_list = {
33 .lock = __RW_LOCK_UNLOCKED(bnep_sk_list.lock)
34 };
35
bnep_sock_release(struct socket * sock)36 static int bnep_sock_release(struct socket *sock)
37 {
38 struct sock *sk = sock->sk;
39
40 BT_DBG("sock %p sk %p", sock, sk);
41
42 if (!sk)
43 return 0;
44
45 bt_sock_unlink(&bnep_sk_list, sk);
46
47 sock_orphan(sk);
48 sock_put(sk);
49 return 0;
50 }
51
do_bnep_sock_ioctl(struct socket * sock,unsigned int cmd,void __user * argp)52 static int do_bnep_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp)
53 {
54 struct bnep_connlist_req cl;
55 struct bnep_connadd_req ca;
56 struct bnep_conndel_req cd;
57 struct bnep_conninfo ci;
58 struct socket *nsock;
59 __u32 supp_feat = BIT(BNEP_SETUP_RESPONSE);
60 int err;
61
62 BT_DBG("cmd %x arg %p", cmd, argp);
63
64 switch (cmd) {
65 case BNEPCONNADD:
66 if (!capable(CAP_NET_ADMIN))
67 return -EPERM;
68
69 if (copy_from_user(&ca, argp, sizeof(ca)))
70 return -EFAULT;
71
72 nsock = sockfd_lookup(ca.sock, &err);
73 if (!nsock)
74 return err;
75
76 if (nsock->sk->sk_state != BT_CONNECTED) {
77 sockfd_put(nsock);
78 return -EBADFD;
79 }
80 ca.device[sizeof(ca.device)-1] = 0;
81
82 err = bnep_add_connection(&ca, nsock);
83 if (!err) {
84 if (copy_to_user(argp, &ca, sizeof(ca)))
85 err = -EFAULT;
86 } else
87 sockfd_put(nsock);
88
89 return err;
90
91 case BNEPCONNDEL:
92 if (!capable(CAP_NET_ADMIN))
93 return -EPERM;
94
95 if (copy_from_user(&cd, argp, sizeof(cd)))
96 return -EFAULT;
97
98 return bnep_del_connection(&cd);
99
100 case BNEPGETCONNLIST:
101 if (copy_from_user(&cl, argp, sizeof(cl)))
102 return -EFAULT;
103
104 if (cl.cnum <= 0)
105 return -EINVAL;
106
107 err = bnep_get_connlist(&cl);
108 if (!err && copy_to_user(argp, &cl, sizeof(cl)))
109 return -EFAULT;
110
111 return err;
112
113 case BNEPGETCONNINFO:
114 if (copy_from_user(&ci, argp, sizeof(ci)))
115 return -EFAULT;
116
117 err = bnep_get_conninfo(&ci);
118 if (!err && copy_to_user(argp, &ci, sizeof(ci)))
119 return -EFAULT;
120
121 return err;
122
123 case BNEPGETSUPPFEAT:
124 if (copy_to_user(argp, &supp_feat, sizeof(supp_feat)))
125 return -EFAULT;
126
127 return 0;
128
129 default:
130 return -EINVAL;
131 }
132
133 return 0;
134 }
135
bnep_sock_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)136 static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
137 {
138 return do_bnep_sock_ioctl(sock, cmd, (void __user *)arg);
139 }
140
141 #ifdef CONFIG_COMPAT
bnep_sock_compat_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)142 static int bnep_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
143 {
144 void __user *argp = compat_ptr(arg);
145 if (cmd == BNEPGETCONNLIST) {
146 struct bnep_connlist_req cl;
147 unsigned __user *p = argp;
148 u32 uci;
149 int err;
150
151 if (get_user(cl.cnum, p) || get_user(uci, p + 1))
152 return -EFAULT;
153
154 cl.ci = compat_ptr(uci);
155
156 if (cl.cnum <= 0)
157 return -EINVAL;
158
159 err = bnep_get_connlist(&cl);
160
161 if (!err && put_user(cl.cnum, p))
162 err = -EFAULT;
163
164 return err;
165 }
166
167 return do_bnep_sock_ioctl(sock, cmd, argp);
168 }
169 #endif
170
171 static const struct proto_ops bnep_sock_ops = {
172 .family = PF_BLUETOOTH,
173 .owner = THIS_MODULE,
174 .release = bnep_sock_release,
175 .ioctl = bnep_sock_ioctl,
176 #ifdef CONFIG_COMPAT
177 .compat_ioctl = bnep_sock_compat_ioctl,
178 #endif
179 .bind = sock_no_bind,
180 .getname = sock_no_getname,
181 .sendmsg = sock_no_sendmsg,
182 .recvmsg = sock_no_recvmsg,
183 .listen = sock_no_listen,
184 .shutdown = sock_no_shutdown,
185 .connect = sock_no_connect,
186 .socketpair = sock_no_socketpair,
187 .accept = sock_no_accept,
188 .mmap = sock_no_mmap
189 };
190
191 static struct proto bnep_proto = {
192 .name = "BNEP",
193 .owner = THIS_MODULE,
194 .obj_size = sizeof(struct bt_sock)
195 };
196
bnep_sock_create(struct net * net,struct socket * sock,int protocol,int kern)197 static int bnep_sock_create(struct net *net, struct socket *sock, int protocol,
198 int kern)
199 {
200 struct sock *sk;
201
202 BT_DBG("sock %p", sock);
203
204 if (sock->type != SOCK_RAW)
205 return -ESOCKTNOSUPPORT;
206
207 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &bnep_proto, kern);
208 if (!sk)
209 return -ENOMEM;
210
211 sock_init_data(sock, sk);
212
213 sock->ops = &bnep_sock_ops;
214
215 sock->state = SS_UNCONNECTED;
216
217 sock_reset_flag(sk, SOCK_ZAPPED);
218
219 sk->sk_protocol = protocol;
220 sk->sk_state = BT_OPEN;
221
222 bt_sock_link(&bnep_sk_list, sk);
223 return 0;
224 }
225
226 static const struct net_proto_family bnep_sock_family_ops = {
227 .family = PF_BLUETOOTH,
228 .owner = THIS_MODULE,
229 .create = bnep_sock_create
230 };
231
bnep_sock_init(void)232 int __init bnep_sock_init(void)
233 {
234 int err;
235
236 err = proto_register(&bnep_proto, 0);
237 if (err < 0)
238 return err;
239
240 err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops);
241 if (err < 0) {
242 BT_ERR("Can't register BNEP socket");
243 goto error;
244 }
245
246 err = bt_procfs_init(&init_net, "bnep", &bnep_sk_list, NULL);
247 if (err < 0) {
248 BT_ERR("Failed to create BNEP proc file");
249 bt_sock_unregister(BTPROTO_BNEP);
250 goto error;
251 }
252
253 BT_INFO("BNEP socket layer initialized");
254
255 return 0;
256
257 error:
258 proto_unregister(&bnep_proto);
259 return err;
260 }
261
bnep_sock_cleanup(void)262 void __exit bnep_sock_cleanup(void)
263 {
264 bt_procfs_cleanup(&init_net, "bnep");
265 bt_sock_unregister(BTPROTO_BNEP);
266 proto_unregister(&bnep_proto);
267 }
268