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Commit | Line | Data |
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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)) | |
bf5b30b8 | 65 | return -EPERM; |
1da177e4 LT |
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 | ||
5205185d DH |
80 | err = hidp_connection_add(&ca, csock, isock); |
81 | if (!err && copy_to_user(argp, &ca, sizeof(ca))) | |
82 | err = -EFAULT; | |
1da177e4 | 83 | |
5205185d DH |
84 | sockfd_put(csock); |
85 | sockfd_put(isock); | |
1da177e4 LT |
86 | |
87 | return err; | |
88 | ||
89 | case HIDPCONNDEL: | |
90 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 91 | return -EPERM; |
1da177e4 LT |
92 | |
93 | if (copy_from_user(&cd, argp, sizeof(cd))) | |
94 | return -EFAULT; | |
95 | ||
5205185d | 96 | return hidp_connection_del(&cd); |
1da177e4 LT |
97 | |
98 | case HIDPGETCONNLIST: | |
99 | if (copy_from_user(&cl, argp, sizeof(cl))) | |
100 | return -EFAULT; | |
101 | ||
102 | if (cl.cnum <= 0) | |
103 | return -EINVAL; | |
104 | ||
105 | err = hidp_get_connlist(&cl); | |
106 | if (!err && copy_to_user(argp, &cl, sizeof(cl))) | |
107 | return -EFAULT; | |
108 | ||
109 | return err; | |
110 | ||
111 | case HIDPGETCONNINFO: | |
112 | if (copy_from_user(&ci, argp, sizeof(ci))) | |
113 | return -EFAULT; | |
114 | ||
115 | err = hidp_get_conninfo(&ci); | |
116 | if (!err && copy_to_user(argp, &ci, sizeof(ci))) | |
117 | return -EFAULT; | |
118 | ||
119 | return err; | |
120 | } | |
121 | ||
122 | return -EINVAL; | |
123 | } | |
124 | ||
e9c5702e MH |
125 | #ifdef CONFIG_COMPAT |
126 | struct compat_hidp_connadd_req { | |
17f09a7e SJ |
127 | int ctrl_sock; /* Connected control socket */ |
128 | int intr_sock; /* Connected interrupt socket */ | |
e9c5702e MH |
129 | __u16 parser; |
130 | __u16 rd_size; | |
131 | compat_uptr_t rd_data; | |
132 | __u8 country; | |
133 | __u8 subclass; | |
134 | __u16 vendor; | |
135 | __u16 product; | |
136 | __u16 version; | |
137 | __u32 flags; | |
138 | __u32 idle_to; | |
139 | char name[128]; | |
140 | }; | |
141 | ||
142 | static int hidp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
143 | { | |
144 | if (cmd == HIDPGETCONNLIST) { | |
145 | struct hidp_connlist_req cl; | |
816a11d5 | 146 | u32 uci; |
e9c5702e MH |
147 | int err; |
148 | ||
816a11d5 | 149 | if (get_user(cl.cnum, (u32 __user *) arg) || |
e9c5702e MH |
150 | get_user(uci, (u32 __user *) (arg + 4))) |
151 | return -EFAULT; | |
152 | ||
153 | cl.ci = compat_ptr(uci); | |
154 | ||
155 | if (cl.cnum <= 0) | |
156 | return -EINVAL; | |
157 | ||
158 | err = hidp_get_connlist(&cl); | |
159 | ||
816a11d5 | 160 | if (!err && put_user(cl.cnum, (u32 __user *) arg)) |
e9c5702e MH |
161 | err = -EFAULT; |
162 | ||
163 | return err; | |
164 | } else if (cmd == HIDPCONNADD) { | |
165 | struct compat_hidp_connadd_req ca; | |
166 | struct hidp_connadd_req __user *uca; | |
167 | ||
168 | uca = compat_alloc_user_space(sizeof(*uca)); | |
169 | ||
55e74744 | 170 | if (copy_from_user(&ca, (void __user *) arg, sizeof(ca))) |
e9c5702e MH |
171 | return -EFAULT; |
172 | ||
173 | if (put_user(ca.ctrl_sock, &uca->ctrl_sock) || | |
174 | put_user(ca.intr_sock, &uca->intr_sock) || | |
175 | put_user(ca.parser, &uca->parser) || | |
a83d6c0d | 176 | put_user(ca.rd_size, &uca->rd_size) || |
e9c5702e MH |
177 | put_user(compat_ptr(ca.rd_data), &uca->rd_data) || |
178 | put_user(ca.country, &uca->country) || | |
179 | put_user(ca.subclass, &uca->subclass) || | |
180 | put_user(ca.vendor, &uca->vendor) || | |
181 | put_user(ca.product, &uca->product) || | |
182 | put_user(ca.version, &uca->version) || | |
183 | put_user(ca.flags, &uca->flags) || | |
184 | put_user(ca.idle_to, &uca->idle_to) || | |
185 | copy_to_user(&uca->name[0], &ca.name[0], 128)) | |
186 | return -EFAULT; | |
8e87d142 | 187 | |
e9c5702e MH |
188 | arg = (unsigned long) uca; |
189 | ||
190 | /* Fall through. We don't actually write back any _changes_ | |
191 | to the structure anyway, so there's no need to copy back | |
192 | into the original compat version */ | |
193 | } | |
194 | ||
195 | return hidp_sock_ioctl(sock, cmd, arg); | |
196 | } | |
197 | #endif | |
198 | ||
90ddc4f0 | 199 | static const struct proto_ops hidp_sock_ops = { |
1da177e4 LT |
200 | .family = PF_BLUETOOTH, |
201 | .owner = THIS_MODULE, | |
202 | .release = hidp_sock_release, | |
203 | .ioctl = hidp_sock_ioctl, | |
e9c5702e MH |
204 | #ifdef CONFIG_COMPAT |
205 | .compat_ioctl = hidp_sock_compat_ioctl, | |
206 | #endif | |
1da177e4 LT |
207 | .bind = sock_no_bind, |
208 | .getname = sock_no_getname, | |
209 | .sendmsg = sock_no_sendmsg, | |
210 | .recvmsg = sock_no_recvmsg, | |
211 | .poll = sock_no_poll, | |
212 | .listen = sock_no_listen, | |
213 | .shutdown = sock_no_shutdown, | |
214 | .setsockopt = sock_no_setsockopt, | |
215 | .getsockopt = sock_no_getsockopt, | |
216 | .connect = sock_no_connect, | |
217 | .socketpair = sock_no_socketpair, | |
218 | .accept = sock_no_accept, | |
219 | .mmap = sock_no_mmap | |
220 | }; | |
221 | ||
222 | static struct proto hidp_proto = { | |
223 | .name = "HIDP", | |
224 | .owner = THIS_MODULE, | |
225 | .obj_size = sizeof(struct bt_sock) | |
226 | }; | |
227 | ||
3f378b68 EP |
228 | static int hidp_sock_create(struct net *net, struct socket *sock, int protocol, |
229 | int kern) | |
1da177e4 LT |
230 | { |
231 | struct sock *sk; | |
232 | ||
233 | BT_DBG("sock %p", sock); | |
234 | ||
235 | if (sock->type != SOCK_RAW) | |
236 | return -ESOCKTNOSUPPORT; | |
237 | ||
6257ff21 | 238 | sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hidp_proto); |
1da177e4 LT |
239 | if (!sk) |
240 | return -ENOMEM; | |
241 | ||
242 | sock_init_data(sock, sk); | |
243 | ||
244 | sock->ops = &hidp_sock_ops; | |
245 | ||
246 | sock->state = SS_UNCONNECTED; | |
247 | ||
248 | sock_reset_flag(sk, SOCK_ZAPPED); | |
249 | ||
250 | sk->sk_protocol = protocol; | |
251 | sk->sk_state = BT_OPEN; | |
252 | ||
5c6ad8ee MY |
253 | bt_sock_link(&hidp_sk_list, sk); |
254 | ||
1da177e4 LT |
255 | return 0; |
256 | } | |
257 | ||
ec1b4cf7 | 258 | static const struct net_proto_family hidp_sock_family_ops = { |
1da177e4 LT |
259 | .family = PF_BLUETOOTH, |
260 | .owner = THIS_MODULE, | |
261 | .create = hidp_sock_create | |
262 | }; | |
263 | ||
264 | int __init hidp_init_sockets(void) | |
265 | { | |
266 | int err; | |
267 | ||
268 | err = proto_register(&hidp_proto, 0); | |
269 | if (err < 0) | |
270 | return err; | |
271 | ||
272 | err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops); | |
5c6ad8ee MY |
273 | if (err < 0) { |
274 | BT_ERR("Can't register HIDP socket"); | |
1da177e4 | 275 | goto error; |
5c6ad8ee MY |
276 | } |
277 | ||
b0316615 | 278 | err = bt_procfs_init(&init_net, "hidp", &hidp_sk_list, NULL); |
5c6ad8ee MY |
279 | if (err < 0) { |
280 | BT_ERR("Failed to create HIDP proc file"); | |
281 | bt_sock_unregister(BTPROTO_HIDP); | |
282 | goto error; | |
283 | } | |
284 | ||
285 | BT_INFO("HIDP socket layer initialized"); | |
1da177e4 LT |
286 | |
287 | return 0; | |
288 | ||
289 | error: | |
1da177e4 LT |
290 | proto_unregister(&hidp_proto); |
291 | return err; | |
292 | } | |
293 | ||
294 | void __exit hidp_cleanup_sockets(void) | |
295 | { | |
5c6ad8ee | 296 | bt_procfs_cleanup(&init_net, "hidp"); |
5e9d7f86 | 297 | bt_sock_unregister(BTPROTO_HIDP); |
1da177e4 LT |
298 | proto_unregister(&hidp_proto); |
299 | } |