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/export.h>
24 #include <linux/file.h>
25
26 #include "hidp.h"
27
28 static struct bt_sock_list hidp_sk_list = {
29 .lock = __RW_LOCK_UNLOCKED(hidp_sk_list.lock)
30 };
31
hidp_sock_release(struct socket * sock)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
41 bt_sock_unlink(&hidp_sk_list, sk);
42
43 sock_orphan(sk);
44 sock_put(sk);
45
46 return 0;
47 }
48
do_hidp_sock_ioctl(struct socket * sock,unsigned int cmd,void __user * argp)49 static int do_hidp_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp)
50 {
51 struct hidp_connadd_req ca;
52 struct hidp_conndel_req cd;
53 struct hidp_connlist_req cl;
54 struct hidp_conninfo ci;
55 struct socket *csock;
56 struct socket *isock;
57 int err;
58
59 BT_DBG("cmd %x arg %p", cmd, argp);
60
61 switch (cmd) {
62 case HIDPCONNADD:
63 if (!capable(CAP_NET_ADMIN))
64 return -EPERM;
65
66 if (copy_from_user(&ca, argp, sizeof(ca)))
67 return -EFAULT;
68
69 csock = sockfd_lookup(ca.ctrl_sock, &err);
70 if (!csock)
71 return err;
72
73 isock = sockfd_lookup(ca.intr_sock, &err);
74 if (!isock) {
75 sockfd_put(csock);
76 return err;
77 }
78 ca.name[sizeof(ca.name)-1] = 0;
79
80 err = hidp_connection_add(&ca, csock, isock);
81 if (!err && copy_to_user(argp, &ca, sizeof(ca)))
82 err = -EFAULT;
83
84 sockfd_put(csock);
85 sockfd_put(isock);
86
87 return err;
88
89 case HIDPCONNDEL:
90 if (!capable(CAP_NET_ADMIN))
91 return -EPERM;
92
93 if (copy_from_user(&cd, argp, sizeof(cd)))
94 return -EFAULT;
95
96 return hidp_connection_del(&cd);
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
hidp_sock_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)125 static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
126 {
127 return do_hidp_sock_ioctl(sock, cmd, (void __user *)arg);
128 }
129
130 #ifdef CONFIG_COMPAT
131 struct compat_hidp_connadd_req {
132 int ctrl_sock; /* Connected control socket */
133 int intr_sock; /* Connected interrupt socket */
134 __u16 parser;
135 __u16 rd_size;
136 compat_uptr_t rd_data;
137 __u8 country;
138 __u8 subclass;
139 __u16 vendor;
140 __u16 product;
141 __u16 version;
142 __u32 flags;
143 __u32 idle_to;
144 char name[128];
145 };
146
hidp_sock_compat_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)147 static int hidp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
148 {
149 void __user *argp = compat_ptr(arg);
150 int err;
151
152 if (cmd == HIDPGETCONNLIST) {
153 struct hidp_connlist_req cl;
154 u32 __user *p = argp;
155 u32 uci;
156
157 if (get_user(cl.cnum, p) || get_user(uci, p + 1))
158 return -EFAULT;
159
160 cl.ci = compat_ptr(uci);
161
162 if (cl.cnum <= 0)
163 return -EINVAL;
164
165 err = hidp_get_connlist(&cl);
166
167 if (!err && put_user(cl.cnum, p))
168 err = -EFAULT;
169
170 return err;
171 } else if (cmd == HIDPCONNADD) {
172 struct compat_hidp_connadd_req ca32;
173 struct hidp_connadd_req ca;
174 struct socket *csock;
175 struct socket *isock;
176
177 if (!capable(CAP_NET_ADMIN))
178 return -EPERM;
179
180 if (copy_from_user(&ca32, (void __user *) arg, sizeof(ca32)))
181 return -EFAULT;
182
183 ca.ctrl_sock = ca32.ctrl_sock;
184 ca.intr_sock = ca32.intr_sock;
185 ca.parser = ca32.parser;
186 ca.rd_size = ca32.rd_size;
187 ca.rd_data = compat_ptr(ca32.rd_data);
188 ca.country = ca32.country;
189 ca.subclass = ca32.subclass;
190 ca.vendor = ca32.vendor;
191 ca.product = ca32.product;
192 ca.version = ca32.version;
193 ca.flags = ca32.flags;
194 ca.idle_to = ca32.idle_to;
195 ca32.name[sizeof(ca32.name) - 1] = '\0';
196 memcpy(ca.name, ca32.name, 128);
197
198 csock = sockfd_lookup(ca.ctrl_sock, &err);
199 if (!csock)
200 return err;
201
202 isock = sockfd_lookup(ca.intr_sock, &err);
203 if (!isock) {
204 sockfd_put(csock);
205 return err;
206 }
207
208 err = hidp_connection_add(&ca, csock, isock);
209 if (!err && copy_to_user(argp, &ca32, sizeof(ca32)))
210 err = -EFAULT;
211
212 sockfd_put(csock);
213 sockfd_put(isock);
214
215 return err;
216 }
217
218 return hidp_sock_ioctl(sock, cmd, arg);
219 }
220 #endif
221
222 static const struct proto_ops hidp_sock_ops = {
223 .family = PF_BLUETOOTH,
224 .owner = THIS_MODULE,
225 .release = hidp_sock_release,
226 .ioctl = hidp_sock_ioctl,
227 #ifdef CONFIG_COMPAT
228 .compat_ioctl = hidp_sock_compat_ioctl,
229 #endif
230 .bind = sock_no_bind,
231 .getname = sock_no_getname,
232 .sendmsg = sock_no_sendmsg,
233 .recvmsg = sock_no_recvmsg,
234 .listen = sock_no_listen,
235 .shutdown = sock_no_shutdown,
236 .setsockopt = sock_no_setsockopt,
237 .getsockopt = sock_no_getsockopt,
238 .connect = sock_no_connect,
239 .socketpair = sock_no_socketpair,
240 .accept = sock_no_accept,
241 .mmap = sock_no_mmap
242 };
243
244 static struct proto hidp_proto = {
245 .name = "HIDP",
246 .owner = THIS_MODULE,
247 .obj_size = sizeof(struct bt_sock)
248 };
249
hidp_sock_create(struct net * net,struct socket * sock,int protocol,int kern)250 static int hidp_sock_create(struct net *net, struct socket *sock, int protocol,
251 int kern)
252 {
253 struct sock *sk;
254
255 BT_DBG("sock %p", sock);
256
257 if (sock->type != SOCK_RAW)
258 return -ESOCKTNOSUPPORT;
259
260 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hidp_proto, kern);
261 if (!sk)
262 return -ENOMEM;
263
264 sock_init_data(sock, sk);
265
266 sock->ops = &hidp_sock_ops;
267
268 sock->state = SS_UNCONNECTED;
269
270 sock_reset_flag(sk, SOCK_ZAPPED);
271
272 sk->sk_protocol = protocol;
273 sk->sk_state = BT_OPEN;
274
275 bt_sock_link(&hidp_sk_list, sk);
276
277 return 0;
278 }
279
280 static const struct net_proto_family hidp_sock_family_ops = {
281 .family = PF_BLUETOOTH,
282 .owner = THIS_MODULE,
283 .create = hidp_sock_create
284 };
285
hidp_init_sockets(void)286 int __init hidp_init_sockets(void)
287 {
288 int err;
289
290 err = proto_register(&hidp_proto, 0);
291 if (err < 0)
292 return err;
293
294 err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops);
295 if (err < 0) {
296 BT_ERR("Can't register HIDP socket");
297 goto error;
298 }
299
300 err = bt_procfs_init(&init_net, "hidp", &hidp_sk_list, NULL);
301 if (err < 0) {
302 BT_ERR("Failed to create HIDP proc file");
303 bt_sock_unregister(BTPROTO_HIDP);
304 goto error;
305 }
306
307 BT_INFO("HIDP socket layer initialized");
308
309 return 0;
310
311 error:
312 proto_unregister(&hidp_proto);
313 return err;
314 }
315
hidp_cleanup_sockets(void)316 void __exit hidp_cleanup_sockets(void)
317 {
318 bt_procfs_cleanup(&init_net, "hidp");
319 bt_sock_unregister(BTPROTO_HIDP);
320 proto_unregister(&hidp_proto);
321 }
322
