Commit | Line | Data |
---|---|---|
8e87d142 | 1 | /* |
1da177e4 LT |
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 | |
8e87d142 YH |
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 | |
1da177e4 LT |
16 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
17 | ||
8e87d142 YH |
18 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
19 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
20 | SOFTWARE IS DISCLAIMED. |
21 | */ | |
22 | ||
8c520a59 | 23 | #include <linux/export.h> |
1da177e4 | 24 | #include <linux/file.h> |
1da177e4 LT |
25 | |
26 | #include "hidp.h" | |
27 | ||
5c6ad8ee MY |
28 | static struct bt_sock_list hidp_sk_list = { |
29 | .lock = __RW_LOCK_UNLOCKED(hidp_sk_list.lock) | |
30 | }; | |
31 | ||
1da177e4 LT |
32 | static int hidp_sock_release(struct socket *sock) |
33 | { | |
34 | struct sock *sk = sock->sk; | |
35 | ||
36 | BT_DBG("sock %p sk %p", sock, sk); | |
37 | ||
38 | if (!sk) | |
39 | return 0; | |
40 | ||
5c6ad8ee MY |
41 | bt_sock_unlink(&hidp_sk_list, sk); |
42 | ||
1da177e4 LT |
43 | sock_orphan(sk); |
44 | sock_put(sk); | |
45 | ||
46 | return 0; | |
47 | } | |
48 | ||
49 | static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
50 | { | |
51 | void __user *argp = (void __user *) arg; | |
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 %lx", cmd, arg); | |
61 | ||
62 | switch (cmd) { | |
63 | case HIDPCONNADD: | |
64 | if (!capable(CAP_NET_ADMIN)) | |
65 | return -EACCES; | |
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) { | |
67b23219 | 76 | sockfd_put(csock); |
1da177e4 LT |
77 | return err; |
78 | } | |
79 | ||
17f09a7e SJ |
80 | if (csock->sk->sk_state != BT_CONNECTED || |
81 | isock->sk->sk_state != BT_CONNECTED) { | |
67b23219 JL |
82 | sockfd_put(csock); |
83 | sockfd_put(isock); | |
1da177e4 LT |
84 | return -EBADFD; |
85 | } | |
86 | ||
87 | err = hidp_add_connection(&ca, csock, isock); | |
88 | if (!err) { | |
89 | if (copy_to_user(argp, &ca, sizeof(ca))) | |
90 | err = -EFAULT; | |
91 | } else { | |
67b23219 JL |
92 | sockfd_put(csock); |
93 | sockfd_put(isock); | |
1da177e4 LT |
94 | } |
95 | ||
96 | return err; | |
97 | ||
98 | case HIDPCONNDEL: | |
99 | if (!capable(CAP_NET_ADMIN)) | |
100 | return -EACCES; | |
101 | ||
102 | if (copy_from_user(&cd, argp, sizeof(cd))) | |
103 | return -EFAULT; | |
104 | ||
105 | return hidp_del_connection(&cd); | |
106 | ||
107 | case HIDPGETCONNLIST: | |
108 | if (copy_from_user(&cl, argp, sizeof(cl))) | |
109 | return -EFAULT; | |
110 | ||
111 | if (cl.cnum <= 0) | |
112 | return -EINVAL; | |
113 | ||
114 | err = hidp_get_connlist(&cl); | |
115 | if (!err && copy_to_user(argp, &cl, sizeof(cl))) | |
116 | return -EFAULT; | |
117 | ||
118 | return err; | |
119 | ||
120 | case HIDPGETCONNINFO: | |
121 | if (copy_from_user(&ci, argp, sizeof(ci))) | |
122 | return -EFAULT; | |
123 | ||
124 | err = hidp_get_conninfo(&ci); | |
125 | if (!err && copy_to_user(argp, &ci, sizeof(ci))) | |
126 | return -EFAULT; | |
127 | ||
128 | return err; | |
129 | } | |
130 | ||
131 | return -EINVAL; | |
132 | } | |
133 | ||
e9c5702e MH |
134 | #ifdef CONFIG_COMPAT |
135 | struct compat_hidp_connadd_req { | |
17f09a7e SJ |
136 | int ctrl_sock; /* Connected control socket */ |
137 | int intr_sock; /* Connected interrupt socket */ | |
e9c5702e MH |
138 | __u16 parser; |
139 | __u16 rd_size; | |
140 | compat_uptr_t rd_data; | |
141 | __u8 country; | |
142 | __u8 subclass; | |
143 | __u16 vendor; | |
144 | __u16 product; | |
145 | __u16 version; | |
146 | __u32 flags; | |
147 | __u32 idle_to; | |
148 | char name[128]; | |
149 | }; | |
150 | ||
151 | static int hidp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
152 | { | |
153 | if (cmd == HIDPGETCONNLIST) { | |
154 | struct hidp_connlist_req cl; | |
816a11d5 | 155 | u32 uci; |
e9c5702e MH |
156 | int err; |
157 | ||
816a11d5 | 158 | if (get_user(cl.cnum, (u32 __user *) arg) || |
e9c5702e MH |
159 | get_user(uci, (u32 __user *) (arg + 4))) |
160 | return -EFAULT; | |
161 | ||
162 | cl.ci = compat_ptr(uci); | |
163 | ||
164 | if (cl.cnum <= 0) | |
165 | return -EINVAL; | |
166 | ||
167 | err = hidp_get_connlist(&cl); | |
168 | ||
816a11d5 | 169 | if (!err && put_user(cl.cnum, (u32 __user *) arg)) |
e9c5702e MH |
170 | err = -EFAULT; |
171 | ||
172 | return err; | |
173 | } else if (cmd == HIDPCONNADD) { | |
174 | struct compat_hidp_connadd_req ca; | |
175 | struct hidp_connadd_req __user *uca; | |
176 | ||
177 | uca = compat_alloc_user_space(sizeof(*uca)); | |
178 | ||
55e74744 | 179 | if (copy_from_user(&ca, (void __user *) arg, sizeof(ca))) |
e9c5702e MH |
180 | return -EFAULT; |
181 | ||
182 | if (put_user(ca.ctrl_sock, &uca->ctrl_sock) || | |
183 | put_user(ca.intr_sock, &uca->intr_sock) || | |
184 | put_user(ca.parser, &uca->parser) || | |
a83d6c0d | 185 | put_user(ca.rd_size, &uca->rd_size) || |
e9c5702e MH |
186 | put_user(compat_ptr(ca.rd_data), &uca->rd_data) || |
187 | put_user(ca.country, &uca->country) || | |
188 | put_user(ca.subclass, &uca->subclass) || | |
189 | put_user(ca.vendor, &uca->vendor) || | |
190 | put_user(ca.product, &uca->product) || | |
191 | put_user(ca.version, &uca->version) || | |
192 | put_user(ca.flags, &uca->flags) || | |
193 | put_user(ca.idle_to, &uca->idle_to) || | |
194 | copy_to_user(&uca->name[0], &ca.name[0], 128)) | |
195 | return -EFAULT; | |
8e87d142 | 196 | |
e9c5702e MH |
197 | arg = (unsigned long) uca; |
198 | ||
199 | /* Fall through. We don't actually write back any _changes_ | |
200 | to the structure anyway, so there's no need to copy back | |
201 | into the original compat version */ | |
202 | } | |
203 | ||
204 | return hidp_sock_ioctl(sock, cmd, arg); | |
205 | } | |
206 | #endif | |
207 | ||
90ddc4f0 | 208 | static const struct proto_ops hidp_sock_ops = { |
1da177e4 LT |
209 | .family = PF_BLUETOOTH, |
210 | .owner = THIS_MODULE, | |
211 | .release = hidp_sock_release, | |
212 | .ioctl = hidp_sock_ioctl, | |
e9c5702e MH |
213 | #ifdef CONFIG_COMPAT |
214 | .compat_ioctl = hidp_sock_compat_ioctl, | |
215 | #endif | |
1da177e4 LT |
216 | .bind = sock_no_bind, |
217 | .getname = sock_no_getname, | |
218 | .sendmsg = sock_no_sendmsg, | |
219 | .recvmsg = sock_no_recvmsg, | |
220 | .poll = sock_no_poll, | |
221 | .listen = sock_no_listen, | |
222 | .shutdown = sock_no_shutdown, | |
223 | .setsockopt = sock_no_setsockopt, | |
224 | .getsockopt = sock_no_getsockopt, | |
225 | .connect = sock_no_connect, | |
226 | .socketpair = sock_no_socketpair, | |
227 | .accept = sock_no_accept, | |
228 | .mmap = sock_no_mmap | |
229 | }; | |
230 | ||
231 | static struct proto hidp_proto = { | |
232 | .name = "HIDP", | |
233 | .owner = THIS_MODULE, | |
234 | .obj_size = sizeof(struct bt_sock) | |
235 | }; | |
236 | ||
3f378b68 EP |
237 | static int hidp_sock_create(struct net *net, struct socket *sock, int protocol, |
238 | int kern) | |
1da177e4 LT |
239 | { |
240 | struct sock *sk; | |
241 | ||
242 | BT_DBG("sock %p", sock); | |
243 | ||
244 | if (sock->type != SOCK_RAW) | |
245 | return -ESOCKTNOSUPPORT; | |
246 | ||
6257ff21 | 247 | sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hidp_proto); |
1da177e4 LT |
248 | if (!sk) |
249 | return -ENOMEM; | |
250 | ||
251 | sock_init_data(sock, sk); | |
252 | ||
253 | sock->ops = &hidp_sock_ops; | |
254 | ||
255 | sock->state = SS_UNCONNECTED; | |
256 | ||
257 | sock_reset_flag(sk, SOCK_ZAPPED); | |
258 | ||
259 | sk->sk_protocol = protocol; | |
260 | sk->sk_state = BT_OPEN; | |
261 | ||
5c6ad8ee MY |
262 | bt_sock_link(&hidp_sk_list, sk); |
263 | ||
1da177e4 LT |
264 | return 0; |
265 | } | |
266 | ||
ec1b4cf7 | 267 | static const struct net_proto_family hidp_sock_family_ops = { |
1da177e4 LT |
268 | .family = PF_BLUETOOTH, |
269 | .owner = THIS_MODULE, | |
270 | .create = hidp_sock_create | |
271 | }; | |
272 | ||
273 | int __init hidp_init_sockets(void) | |
274 | { | |
275 | int err; | |
276 | ||
277 | err = proto_register(&hidp_proto, 0); | |
278 | if (err < 0) | |
279 | return err; | |
280 | ||
281 | err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops); | |
5c6ad8ee MY |
282 | if (err < 0) { |
283 | BT_ERR("Can't register HIDP socket"); | |
1da177e4 | 284 | goto error; |
5c6ad8ee MY |
285 | } |
286 | ||
287 | err = bt_procfs_init(THIS_MODULE, &init_net, "hidp", &hidp_sk_list, NULL); | |
288 | if (err < 0) { | |
289 | BT_ERR("Failed to create HIDP proc file"); | |
290 | bt_sock_unregister(BTPROTO_HIDP); | |
291 | goto error; | |
292 | } | |
293 | ||
294 | BT_INFO("HIDP socket layer initialized"); | |
1da177e4 LT |
295 | |
296 | return 0; | |
297 | ||
298 | error: | |
299 | BT_ERR("Can't register HIDP socket"); | |
300 | proto_unregister(&hidp_proto); | |
301 | return err; | |
302 | } | |
303 | ||
304 | void __exit hidp_cleanup_sockets(void) | |
305 | { | |
5c6ad8ee | 306 | bt_procfs_cleanup(&init_net, "hidp"); |
1da177e4 LT |
307 | if (bt_sock_unregister(BTPROTO_HIDP) < 0) |
308 | BT_ERR("Can't unregister HIDP socket"); | |
309 | ||
310 | proto_unregister(&hidp_proto); | |
311 | } |