1 /*
2 HIDP implementation for Linux Bluetooth stack (BlueZ).
3 Copyright (C) 2003-2004 Marcel Holtmann <marcel@holtmann.org>
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License version 2 as
7 published by the Free Software Foundation;
8
9 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
10 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
11 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
12 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
13 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
14 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17
18 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
19 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
20 SOFTWARE IS DISCLAIMED.
21 */
22
23 #include <linux/compat.h>
24 #include <linux/export.h>
25 #include <linux/file.h>
26
27 #include "hidp.h"
28
29 static struct bt_sock_list hidp_sk_list = {
30 .lock = __RW_LOCK_UNLOCKED(hidp_sk_list.lock)
31 };
32
33 static int hidp_sock_release(struct socket *sock)
34 {
35 struct sock *sk = sock->sk;
36
37 BT_DBG("sock %p sk %p", sock, sk);
38
39 if (!sk)
40 return 0;
41
42 bt_sock_unlink(&hidp_sk_list, sk);
43
44 sock_orphan(sk);
45 sock_put(sk);
46
47 return 0;
48 }
49
50 static int do_hidp_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp)
51 {
52 struct hidp_connadd_req ca;
53 struct hidp_conndel_req cd;
54 struct hidp_connlist_req cl;
55 struct hidp_conninfo ci;
56 struct socket *csock;
57 struct socket *isock;
58 int err;
59
60 BT_DBG("cmd %x arg %p", cmd, argp);
61
62 switch (cmd) {
63 case HIDPCONNADD:
64 if (!capable(CAP_NET_ADMIN))
65 return -EPERM;
66
67 if (copy_from_user(&ca, argp, sizeof(ca)))
68 return -EFAULT;
69
70 csock = sockfd_lookup(ca.ctrl_sock, &err);
71 if (!csock)
72 return err;
73
74 isock = sockfd_lookup(ca.intr_sock, &err);
75 if (!isock) {
76 sockfd_put(csock);
77 return err;
78 }
79 ca.name[sizeof(ca.name)-1] = 0;
80
81 err = hidp_connection_add(&ca, csock, isock);
82 if (!err && copy_to_user(argp, &ca, sizeof(ca)))
83 err = -EFAULT;
84
85 sockfd_put(csock);
86 sockfd_put(isock);
87
88 return err;
89
90 case HIDPCONNDEL:
91 if (!capable(CAP_NET_ADMIN))
92 return -EPERM;
93
94 if (copy_from_user(&cd, argp, sizeof(cd)))
95 return -EFAULT;
96
97 return hidp_connection_del(&cd);
98
99 case HIDPGETCONNLIST:
100 if (copy_from_user(&cl, argp, sizeof(cl)))
101 return -EFAULT;
102
103 if (cl.cnum <= 0)
104 return -EINVAL;
105
106 err = hidp_get_connlist(&cl);
107 if (!err && copy_to_user(argp, &cl, sizeof(cl)))
108 return -EFAULT;
109
110 return err;
111
112 case HIDPGETCONNINFO:
113 if (copy_from_user(&ci, argp, sizeof(ci)))
114 return -EFAULT;
115
116 err = hidp_get_conninfo(&ci);
117 if (!err && copy_to_user(argp, &ci, sizeof(ci)))
118 return -EFAULT;
119
120 return err;
121 }
122
123 return -EINVAL;
124 }
125
126 static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
127 {
128 return do_hidp_sock_ioctl(sock, cmd, (void __user *)arg);
129 }
130
131 #ifdef CONFIG_COMPAT
132 struct compat_hidp_connadd_req {
133 int ctrl_sock; /* Connected control socket */
134 int intr_sock; /* Connected interrupt socket */
135 __u16 parser;
136 __u16 rd_size;
137 compat_uptr_t rd_data;
138 __u8 country;
139 __u8 subclass;
140 __u16 vendor;
141 __u16 product;
142 __u16 version;
143 __u32 flags;
144 __u32 idle_to;
145 char name[128];
146 };
147
148 static int hidp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
149 {
150 void __user *argp = compat_ptr(arg);
151 int err;
152
153 if (cmd == HIDPGETCONNLIST) {
154 struct hidp_connlist_req cl;
155 u32 __user *p = argp;
156 u32 uci;
157
158 if (get_user(cl.cnum, p) || get_user(uci, p + 1))
159 return -EFAULT;
160
161 cl.ci = compat_ptr(uci);
162
163 if (cl.cnum <= 0)
164 return -EINVAL;
165
166 err = hidp_get_connlist(&cl);
167
168 if (!err && put_user(cl.cnum, p))
169 err = -EFAULT;
170
171 return err;
172 } else if (cmd == HIDPCONNADD) {
173 struct compat_hidp_connadd_req ca32;
174 struct hidp_connadd_req ca;
175 struct socket *csock;
176 struct socket *isock;
177
178 if (!capable(CAP_NET_ADMIN))
179 return -EPERM;
180
181 if (copy_from_user(&ca32, (void __user *) arg, sizeof(ca32)))
182 return -EFAULT;
183
184 ca.ctrl_sock = ca32.ctrl_sock;
185 ca.intr_sock = ca32.intr_sock;
186 ca.parser = ca32.parser;
187 ca.rd_size = ca32.rd_size;
188 ca.rd_data = compat_ptr(ca32.rd_data);
189 ca.country = ca32.country;
190 ca.subclass = ca32.subclass;
191 ca.vendor = ca32.vendor;
192 ca.product = ca32.product;
193 ca.version = ca32.version;
194 ca.flags = ca32.flags;
195 ca.idle_to = ca32.idle_to;
196 ca32.name[sizeof(ca32.name) - 1] = '\0';
197 memcpy(ca.name, ca32.name, 128);
198
199 csock = sockfd_lookup(ca.ctrl_sock, &err);
200 if (!csock)
201 return err;
202
203 isock = sockfd_lookup(ca.intr_sock, &err);
204 if (!isock) {
205 sockfd_put(csock);
206 return err;
207 }
208
209 err = hidp_connection_add(&ca, csock, isock);
210 if (!err && copy_to_user(argp, &ca32, sizeof(ca32)))
211 err = -EFAULT;
212
213 sockfd_put(csock);
214 sockfd_put(isock);
215
216 return err;
217 }
218
219 return hidp_sock_ioctl(sock, cmd, arg);
220 }
221 #endif
222
223 static const struct proto_ops hidp_sock_ops = {
224 .family = PF_BLUETOOTH,
225 .owner = THIS_MODULE,
226 .release = hidp_sock_release,
227 .ioctl = hidp_sock_ioctl,
228 #ifdef CONFIG_COMPAT
229 .compat_ioctl = hidp_sock_compat_ioctl,
230 #endif
231 .bind = sock_no_bind,
232 .getname = sock_no_getname,
233 .sendmsg = sock_no_sendmsg,
234 .recvmsg = sock_no_recvmsg,
235 .listen = sock_no_listen,
236 .shutdown = sock_no_shutdown,
237 .connect = sock_no_connect,
238 .socketpair = sock_no_socketpair,
239 .accept = sock_no_accept,
240 .mmap = sock_no_mmap
241 };
242
243 static struct proto hidp_proto = {
244 .name = "HIDP",
245 .owner = THIS_MODULE,
246 .obj_size = sizeof(struct bt_sock)
247 };
248
249 static int hidp_sock_create(struct net *net, struct socket *sock, int protocol,
250 int kern)
251 {
252 struct sock *sk;
253
254 BT_DBG("sock %p", sock);
255
256 if (sock->type != SOCK_RAW)
257 return -ESOCKTNOSUPPORT;
258
259 sk = bt_sock_alloc(net, sock, &hidp_proto, protocol, GFP_ATOMIC, kern);
260 if (!sk)
261 return -ENOMEM;
262
263 sock->ops = &hidp_sock_ops;
264 sock->state = SS_UNCONNECTED;
265
266 bt_sock_link(&hidp_sk_list, sk);
267
268 return 0;
269 }
270
271 static const struct net_proto_family hidp_sock_family_ops = {
272 .family = PF_BLUETOOTH,
273 .owner = THIS_MODULE,
274 .create = hidp_sock_create
275 };
276
277 int __init hidp_init_sockets(void)
278 {
279 int err;
280
281 err = proto_register(&hidp_proto, 0);
282 if (err < 0)
283 return err;
284
285 err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops);
286 if (err < 0) {
287 BT_ERR("Can't register HIDP socket");
288 goto error;
289 }
290
291 err = bt_procfs_init(&init_net, "hidp", &hidp_sk_list, NULL);
292 if (err < 0) {
293 BT_ERR("Failed to create HIDP proc file");
294 bt_sock_unregister(BTPROTO_HIDP);
295 goto error;
296 }
297
298 BT_INFO("HIDP socket layer initialized");
299
300 return 0;
301
302 error:
303 proto_unregister(&hidp_proto);
304 return err;
305 }
306
307 void __exit hidp_cleanup_sockets(void)
308 {
309 bt_procfs_cleanup(&init_net, "hidp");
310 bt_sock_unregister(BTPROTO_HIDP);
311 proto_unregister(&hidp_proto);
312 }
313
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