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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 | ||
1da177e4 LT |
23 | #include <linux/module.h> |
24 | ||
25 | #include <linux/types.h> | |
4fc268d2 | 26 | #include <linux/capability.h> |
1da177e4 LT |
27 | #include <linux/errno.h> |
28 | #include <linux/kernel.h> | |
1da177e4 LT |
29 | #include <linux/slab.h> |
30 | #include <linux/poll.h> | |
31 | #include <linux/fcntl.h> | |
32 | #include <linux/skbuff.h> | |
33 | #include <linux/socket.h> | |
34 | #include <linux/ioctl.h> | |
35 | #include <linux/file.h> | |
36 | #include <linux/init.h> | |
e9c5702e | 37 | #include <linux/compat.h> |
1da177e4 LT |
38 | #include <net/sock.h> |
39 | ||
40 | #include "hidp.h" | |
41 | ||
42 | #ifndef CONFIG_BT_HIDP_DEBUG | |
43 | #undef BT_DBG | |
44 | #define BT_DBG(D...) | |
45 | #endif | |
46 | ||
47 | static int hidp_sock_release(struct socket *sock) | |
48 | { | |
49 | struct sock *sk = sock->sk; | |
50 | ||
51 | BT_DBG("sock %p sk %p", sock, sk); | |
52 | ||
53 | if (!sk) | |
54 | return 0; | |
55 | ||
56 | sock_orphan(sk); | |
57 | sock_put(sk); | |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
62 | static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
63 | { | |
64 | void __user *argp = (void __user *) arg; | |
65 | struct hidp_connadd_req ca; | |
66 | struct hidp_conndel_req cd; | |
67 | struct hidp_connlist_req cl; | |
68 | struct hidp_conninfo ci; | |
69 | struct socket *csock; | |
70 | struct socket *isock; | |
71 | int err; | |
72 | ||
73 | BT_DBG("cmd %x arg %lx", cmd, arg); | |
74 | ||
75 | switch (cmd) { | |
76 | case HIDPCONNADD: | |
77 | if (!capable(CAP_NET_ADMIN)) | |
78 | return -EACCES; | |
79 | ||
80 | if (copy_from_user(&ca, argp, sizeof(ca))) | |
81 | return -EFAULT; | |
82 | ||
83 | csock = sockfd_lookup(ca.ctrl_sock, &err); | |
84 | if (!csock) | |
85 | return err; | |
86 | ||
87 | isock = sockfd_lookup(ca.intr_sock, &err); | |
88 | if (!isock) { | |
89 | fput(csock->file); | |
90 | return err; | |
91 | } | |
92 | ||
93 | if (csock->sk->sk_state != BT_CONNECTED || isock->sk->sk_state != BT_CONNECTED) { | |
94 | fput(csock->file); | |
95 | fput(isock->file); | |
96 | return -EBADFD; | |
97 | } | |
98 | ||
99 | err = hidp_add_connection(&ca, csock, isock); | |
100 | if (!err) { | |
101 | if (copy_to_user(argp, &ca, sizeof(ca))) | |
102 | err = -EFAULT; | |
103 | } else { | |
104 | fput(csock->file); | |
105 | fput(isock->file); | |
106 | } | |
107 | ||
108 | return err; | |
109 | ||
110 | case HIDPCONNDEL: | |
111 | if (!capable(CAP_NET_ADMIN)) | |
112 | return -EACCES; | |
113 | ||
114 | if (copy_from_user(&cd, argp, sizeof(cd))) | |
115 | return -EFAULT; | |
116 | ||
117 | return hidp_del_connection(&cd); | |
118 | ||
119 | case HIDPGETCONNLIST: | |
120 | if (copy_from_user(&cl, argp, sizeof(cl))) | |
121 | return -EFAULT; | |
122 | ||
123 | if (cl.cnum <= 0) | |
124 | return -EINVAL; | |
125 | ||
126 | err = hidp_get_connlist(&cl); | |
127 | if (!err && copy_to_user(argp, &cl, sizeof(cl))) | |
128 | return -EFAULT; | |
129 | ||
130 | return err; | |
131 | ||
132 | case HIDPGETCONNINFO: | |
133 | if (copy_from_user(&ci, argp, sizeof(ci))) | |
134 | return -EFAULT; | |
135 | ||
136 | err = hidp_get_conninfo(&ci); | |
137 | if (!err && copy_to_user(argp, &ci, sizeof(ci))) | |
138 | return -EFAULT; | |
139 | ||
140 | return err; | |
141 | } | |
142 | ||
143 | return -EINVAL; | |
144 | } | |
145 | ||
e9c5702e MH |
146 | #ifdef CONFIG_COMPAT |
147 | struct compat_hidp_connadd_req { | |
148 | int ctrl_sock; // Connected control socket | |
149 | int intr_sock; // Connteted interrupt socket | |
150 | __u16 parser; | |
151 | __u16 rd_size; | |
152 | compat_uptr_t rd_data; | |
153 | __u8 country; | |
154 | __u8 subclass; | |
155 | __u16 vendor; | |
156 | __u16 product; | |
157 | __u16 version; | |
158 | __u32 flags; | |
159 | __u32 idle_to; | |
160 | char name[128]; | |
161 | }; | |
162 | ||
163 | static int hidp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
164 | { | |
165 | if (cmd == HIDPGETCONNLIST) { | |
166 | struct hidp_connlist_req cl; | |
167 | uint32_t uci; | |
168 | int err; | |
169 | ||
170 | if (get_user(cl.cnum, (uint32_t __user *) arg) || | |
171 | get_user(uci, (u32 __user *) (arg + 4))) | |
172 | return -EFAULT; | |
173 | ||
174 | cl.ci = compat_ptr(uci); | |
175 | ||
176 | if (cl.cnum <= 0) | |
177 | return -EINVAL; | |
178 | ||
179 | err = hidp_get_connlist(&cl); | |
180 | ||
181 | if (!err && put_user(cl.cnum, (uint32_t __user *) arg)) | |
182 | err = -EFAULT; | |
183 | ||
184 | return err; | |
185 | } else if (cmd == HIDPCONNADD) { | |
186 | struct compat_hidp_connadd_req ca; | |
187 | struct hidp_connadd_req __user *uca; | |
188 | ||
189 | uca = compat_alloc_user_space(sizeof(*uca)); | |
190 | ||
55e74744 | 191 | if (copy_from_user(&ca, (void __user *) arg, sizeof(ca))) |
e9c5702e MH |
192 | return -EFAULT; |
193 | ||
194 | if (put_user(ca.ctrl_sock, &uca->ctrl_sock) || | |
195 | put_user(ca.intr_sock, &uca->intr_sock) || | |
196 | put_user(ca.parser, &uca->parser) || | |
a83d6c0d | 197 | put_user(ca.rd_size, &uca->rd_size) || |
e9c5702e MH |
198 | put_user(compat_ptr(ca.rd_data), &uca->rd_data) || |
199 | put_user(ca.country, &uca->country) || | |
200 | put_user(ca.subclass, &uca->subclass) || | |
201 | put_user(ca.vendor, &uca->vendor) || | |
202 | put_user(ca.product, &uca->product) || | |
203 | put_user(ca.version, &uca->version) || | |
204 | put_user(ca.flags, &uca->flags) || | |
205 | put_user(ca.idle_to, &uca->idle_to) || | |
206 | copy_to_user(&uca->name[0], &ca.name[0], 128)) | |
207 | return -EFAULT; | |
8e87d142 | 208 | |
e9c5702e MH |
209 | arg = (unsigned long) uca; |
210 | ||
211 | /* Fall through. We don't actually write back any _changes_ | |
212 | to the structure anyway, so there's no need to copy back | |
213 | into the original compat version */ | |
214 | } | |
215 | ||
216 | return hidp_sock_ioctl(sock, cmd, arg); | |
217 | } | |
218 | #endif | |
219 | ||
90ddc4f0 | 220 | static const struct proto_ops hidp_sock_ops = { |
1da177e4 LT |
221 | .family = PF_BLUETOOTH, |
222 | .owner = THIS_MODULE, | |
223 | .release = hidp_sock_release, | |
224 | .ioctl = hidp_sock_ioctl, | |
e9c5702e MH |
225 | #ifdef CONFIG_COMPAT |
226 | .compat_ioctl = hidp_sock_compat_ioctl, | |
227 | #endif | |
1da177e4 LT |
228 | .bind = sock_no_bind, |
229 | .getname = sock_no_getname, | |
230 | .sendmsg = sock_no_sendmsg, | |
231 | .recvmsg = sock_no_recvmsg, | |
232 | .poll = sock_no_poll, | |
233 | .listen = sock_no_listen, | |
234 | .shutdown = sock_no_shutdown, | |
235 | .setsockopt = sock_no_setsockopt, | |
236 | .getsockopt = sock_no_getsockopt, | |
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 | ||
1b8d7ae4 | 249 | static int hidp_sock_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
250 | { |
251 | struct sock *sk; | |
252 | ||
253 | BT_DBG("sock %p", sock); | |
254 | ||
255 | if (sock->type != SOCK_RAW) | |
256 | return -ESOCKTNOSUPPORT; | |
257 | ||
6257ff21 | 258 | sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hidp_proto); |
1da177e4 LT |
259 | if (!sk) |
260 | return -ENOMEM; | |
261 | ||
262 | sock_init_data(sock, sk); | |
263 | ||
264 | sock->ops = &hidp_sock_ops; | |
265 | ||
266 | sock->state = SS_UNCONNECTED; | |
267 | ||
268 | sock_reset_flag(sk, SOCK_ZAPPED); | |
269 | ||
270 | sk->sk_protocol = protocol; | |
271 | sk->sk_state = BT_OPEN; | |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
276 | static struct net_proto_family hidp_sock_family_ops = { | |
277 | .family = PF_BLUETOOTH, | |
278 | .owner = THIS_MODULE, | |
279 | .create = hidp_sock_create | |
280 | }; | |
281 | ||
282 | int __init hidp_init_sockets(void) | |
283 | { | |
284 | int err; | |
285 | ||
286 | err = proto_register(&hidp_proto, 0); | |
287 | if (err < 0) | |
288 | return err; | |
289 | ||
290 | err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops); | |
291 | if (err < 0) | |
292 | goto error; | |
293 | ||
294 | return 0; | |
295 | ||
296 | error: | |
297 | BT_ERR("Can't register HIDP socket"); | |
298 | proto_unregister(&hidp_proto); | |
299 | return err; | |
300 | } | |
301 | ||
302 | void __exit hidp_cleanup_sockets(void) | |
303 | { | |
304 | if (bt_sock_unregister(BTPROTO_HIDP) < 0) | |
305 | BT_ERR("Can't unregister HIDP socket"); | |
306 | ||
307 | proto_unregister(&hidp_proto); | |
308 | } |