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
bnep_sock_release(struct socket * sock)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
do_bnep_sock_ioctl(struct socket * sock,unsigned int cmd,void __user * argp)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
bnep_sock_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)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
bnep_sock_compat_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)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
bnep_sock_create(struct net * net,struct socket * sock,int protocol,int kern)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 = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &bnep_proto, kern);
209 if (!sk)
210 return -ENOMEM;
211
212 sock_init_data(sock, sk);
213
214 sock->ops = &bnep_sock_ops;
215
216 sock->state = SS_UNCONNECTED;
217
218 sock_reset_flag(sk, SOCK_ZAPPED);
219
220 sk->sk_protocol = protocol;
221 sk->sk_state = BT_OPEN;
222
223 bt_sock_link(&bnep_sk_list, sk);
224 return 0;
225 }
226
227 static const struct net_proto_family bnep_sock_family_ops = {
228 .family = PF_BLUETOOTH,
229 .owner = THIS_MODULE,
230 .create = bnep_sock_create
231 };
232
bnep_sock_init(void)233 int __init bnep_sock_init(void)
234 {
235 int err;
236
237 err = proto_register(&bnep_proto, 0);
238 if (err < 0)
239 return err;
240
241 err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops);
242 if (err < 0) {
243 BT_ERR("Can't register BNEP socket");
244 goto error;
245 }
246
247 err = bt_procfs_init(&init_net, "bnep", &bnep_sk_list, NULL);
248 if (err < 0) {
249 BT_ERR("Failed to create BNEP proc file");
250 bt_sock_unregister(BTPROTO_BNEP);
251 goto error;
252 }
253
254 BT_INFO("BNEP socket layer initialized");
255
256 return 0;
257
258 error:
259 proto_unregister(&bnep_proto);
260 return err;
261 }
262
bnep_sock_cleanup(void)263 void __exit bnep_sock_cleanup(void)
264 {
265 bt_procfs_cleanup(&init_net, "bnep");
266 bt_sock_unregister(BTPROTO_BNEP);
267 proto_unregister(&bnep_proto);
268 }
269
