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
bnep_sock_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)52 static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
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 void __user *argp = (void __user *)arg;
60 __u32 supp_feat = BIT(BNEP_SETUP_RESPONSE);
61 int err;
62
63 BT_DBG("cmd %x arg %lx", cmd, arg);
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 #ifdef CONFIG_COMPAT
bnep_sock_compat_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)138 static int bnep_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
139 {
140 if (cmd == BNEPGETCONNLIST) {
141 struct bnep_connlist_req cl;
142 u32 uci;
143 int err;
144
145 if (get_user(cl.cnum, (u32 __user *) arg) ||
146 get_user(uci, (u32 __user *) (arg + 4)))
147 return -EFAULT;
148
149 cl.ci = compat_ptr(uci);
150
151 if (cl.cnum <= 0)
152 return -EINVAL;
153
154 err = bnep_get_connlist(&cl);
155
156 if (!err && put_user(cl.cnum, (u32 __user *) arg))
157 err = -EFAULT;
158
159 return err;
160 }
161
162 return bnep_sock_ioctl(sock, cmd, arg);
163 }
164 #endif
165
166 static const struct proto_ops bnep_sock_ops = {
167 .family = PF_BLUETOOTH,
168 .owner = THIS_MODULE,
169 .release = bnep_sock_release,
170 .ioctl = bnep_sock_ioctl,
171 #ifdef CONFIG_COMPAT
172 .compat_ioctl = bnep_sock_compat_ioctl,
173 #endif
174 .bind = sock_no_bind,
175 .getname = sock_no_getname,
176 .sendmsg = sock_no_sendmsg,
177 .recvmsg = sock_no_recvmsg,
178 .listen = sock_no_listen,
179 .shutdown = sock_no_shutdown,
180 .setsockopt = sock_no_setsockopt,
181 .getsockopt = sock_no_getsockopt,
182 .connect = sock_no_connect,
183 .socketpair = sock_no_socketpair,
184 .accept = sock_no_accept,
185 .mmap = sock_no_mmap
186 };
187
188 static struct proto bnep_proto = {
189 .name = "BNEP",
190 .owner = THIS_MODULE,
191 .obj_size = sizeof(struct bt_sock)
192 };
193
bnep_sock_create(struct net * net,struct socket * sock,int protocol,int kern)194 static int bnep_sock_create(struct net *net, struct socket *sock, int protocol,
195 int kern)
196 {
197 struct sock *sk;
198
199 BT_DBG("sock %p", sock);
200
201 if (sock->type != SOCK_RAW)
202 return -ESOCKTNOSUPPORT;
203
204 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &bnep_proto, kern);
205 if (!sk)
206 return -ENOMEM;
207
208 sock_init_data(sock, sk);
209
210 sock->ops = &bnep_sock_ops;
211
212 sock->state = SS_UNCONNECTED;
213
214 sock_reset_flag(sk, SOCK_ZAPPED);
215
216 sk->sk_protocol = protocol;
217 sk->sk_state = BT_OPEN;
218
219 bt_sock_link(&bnep_sk_list, sk);
220 return 0;
221 }
222
223 static const struct net_proto_family bnep_sock_family_ops = {
224 .family = PF_BLUETOOTH,
225 .owner = THIS_MODULE,
226 .create = bnep_sock_create
227 };
228
bnep_sock_init(void)229 int __init bnep_sock_init(void)
230 {
231 int err;
232
233 err = proto_register(&bnep_proto, 0);
234 if (err < 0)
235 return err;
236
237 err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops);
238 if (err < 0) {
239 BT_ERR("Can't register BNEP socket");
240 goto error;
241 }
242
243 err = bt_procfs_init(&init_net, "bnep", &bnep_sk_list, NULL);
244 if (err < 0) {
245 BT_ERR("Failed to create BNEP proc file");
246 bt_sock_unregister(BTPROTO_BNEP);
247 goto error;
248 }
249
250 BT_INFO("BNEP socket layer initialized");
251
252 return 0;
253
254 error:
255 proto_unregister(&bnep_proto);
256 return err;
257 }
258
bnep_sock_cleanup(void)259 void __exit bnep_sock_cleanup(void)
260 {
261 bt_procfs_cleanup(&init_net, "bnep");
262 bt_sock_unregister(BTPROTO_BNEP);
263 proto_unregister(&bnep_proto);
264 }
265
