Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
28static struct bt_sock_list hidp_sk_list = {
29 .lock = __RW_LOCK_UNLOCKED(hidp_sk_list.lock)
30};
31
32static 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
49static 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
79 err = hidp_connection_add(&ca, csock, isock);
80 if (!err && copy_to_user(argp, &ca, sizeof(ca)))
81 err = -EFAULT;
82
83 sockfd_put(csock);
84 sockfd_put(isock);
85
86 return err;
87
88 case HIDPCONNDEL:
89 if (!capable(CAP_NET_ADMIN))
90 return -EPERM;
91
92 if (copy_from_user(&cd, argp, sizeof(cd)))
93 return -EFAULT;
94
95 return hidp_connection_del(&cd);
96
97 case HIDPGETCONNLIST:
98 if (copy_from_user(&cl, argp, sizeof(cl)))
99 return -EFAULT;
100
101 if (cl.cnum <= 0)
102 return -EINVAL;
103
104 err = hidp_get_connlist(&cl);
105 if (!err && copy_to_user(argp, &cl, sizeof(cl)))
106 return -EFAULT;
107
108 return err;
109
110 case HIDPGETCONNINFO:
111 if (copy_from_user(&ci, argp, sizeof(ci)))
112 return -EFAULT;
113
114 err = hidp_get_conninfo(&ci);
115 if (!err && copy_to_user(argp, &ci, sizeof(ci)))
116 return -EFAULT;
117
118 return err;
119 }
120
121 return -EINVAL;
122}
123
124static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
125{
126 return do_hidp_sock_ioctl(sock, cmd, (void __user *)arg);
127}
128
129#ifdef CONFIG_COMPAT
130struct compat_hidp_connadd_req {
131 int ctrl_sock; /* Connected control socket */
132 int intr_sock; /* Connected interrupt socket */
133 __u16 parser;
134 __u16 rd_size;
135 compat_uptr_t rd_data;
136 __u8 country;
137 __u8 subclass;
138 __u16 vendor;
139 __u16 product;
140 __u16 version;
141 __u32 flags;
142 __u32 idle_to;
143 char name[128];
144};
145
146static int hidp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
147{
148 void __user *argp = compat_ptr(arg);
149 int err;
150
151 if (cmd == HIDPGETCONNLIST) {
152 struct hidp_connlist_req cl;
153 u32 __user *p = argp;
154 u32 uci;
155
156 if (get_user(cl.cnum, p) || get_user(uci, p + 1))
157 return -EFAULT;
158
159 cl.ci = compat_ptr(uci);
160
161 if (cl.cnum <= 0)
162 return -EINVAL;
163
164 err = hidp_get_connlist(&cl);
165
166 if (!err && put_user(cl.cnum, p))
167 err = -EFAULT;
168
169 return err;
170 } else if (cmd == HIDPCONNADD) {
171 struct compat_hidp_connadd_req ca32;
172 struct hidp_connadd_req ca;
173 struct socket *csock;
174 struct socket *isock;
175
176 if (!capable(CAP_NET_ADMIN))
177 return -EPERM;
178
179 if (copy_from_user(&ca32, (void __user *) arg, sizeof(ca32)))
180 return -EFAULT;
181
182 ca.ctrl_sock = ca32.ctrl_sock;
183 ca.intr_sock = ca32.intr_sock;
184 ca.parser = ca32.parser;
185 ca.rd_size = ca32.rd_size;
186 ca.rd_data = compat_ptr(ca32.rd_data);
187 ca.country = ca32.country;
188 ca.subclass = ca32.subclass;
189 ca.vendor = ca32.vendor;
190 ca.product = ca32.product;
191 ca.version = ca32.version;
192 ca.flags = ca32.flags;
193 ca.idle_to = ca32.idle_to;
194 memcpy(ca.name, ca32.name, 128);
195
196 csock = sockfd_lookup(ca.ctrl_sock, &err);
197 if (!csock)
198 return err;
199
200 isock = sockfd_lookup(ca.intr_sock, &err);
201 if (!isock) {
202 sockfd_put(csock);
203 return err;
204 }
205
206 err = hidp_connection_add(&ca, csock, isock);
207 if (!err && copy_to_user(argp, &ca32, sizeof(ca32)))
208 err = -EFAULT;
209
210 sockfd_put(csock);
211 sockfd_put(isock);
212
213 return err;
214 }
215
216 return hidp_sock_ioctl(sock, cmd, arg);
217}
218#endif
219
220static const struct proto_ops hidp_sock_ops = {
221 .family = PF_BLUETOOTH,
222 .owner = THIS_MODULE,
223 .release = hidp_sock_release,
224 .ioctl = hidp_sock_ioctl,
225#ifdef CONFIG_COMPAT
226 .compat_ioctl = hidp_sock_compat_ioctl,
227#endif
228 .bind = sock_no_bind,
229 .getname = sock_no_getname,
230 .sendmsg = sock_no_sendmsg,
231 .recvmsg = sock_no_recvmsg,
232 .listen = sock_no_listen,
233 .shutdown = sock_no_shutdown,
234 .setsockopt = sock_no_setsockopt,
235 .getsockopt = sock_no_getsockopt,
236 .connect = sock_no_connect,
237 .socketpair = sock_no_socketpair,
238 .accept = sock_no_accept,
239 .mmap = sock_no_mmap
240};
241
242static struct proto hidp_proto = {
243 .name = "HIDP",
244 .owner = THIS_MODULE,
245 .obj_size = sizeof(struct bt_sock)
246};
247
248static int hidp_sock_create(struct net *net, struct socket *sock, int protocol,
249 int kern)
250{
251 struct sock *sk;
252
253 BT_DBG("sock %p", sock);
254
255 if (sock->type != SOCK_RAW)
256 return -ESOCKTNOSUPPORT;
257
258 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hidp_proto, kern);
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 bt_sock_link(&hidp_sk_list, sk);
274
275 return 0;
276}
277
278static const struct net_proto_family hidp_sock_family_ops = {
279 .family = PF_BLUETOOTH,
280 .owner = THIS_MODULE,
281 .create = hidp_sock_create
282};
283
284int __init hidp_init_sockets(void)
285{
286 int err;
287
288 err = proto_register(&hidp_proto, 0);
289 if (err < 0)
290 return err;
291
292 err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops);
293 if (err < 0) {
294 BT_ERR("Can't register HIDP socket");
295 goto error;
296 }
297
298 err = bt_procfs_init(&init_net, "hidp", &hidp_sk_list, NULL);
299 if (err < 0) {
300 BT_ERR("Failed to create HIDP proc file");
301 bt_sock_unregister(BTPROTO_HIDP);
302 goto error;
303 }
304
305 BT_INFO("HIDP socket layer initialized");
306
307 return 0;
308
309error:
310 proto_unregister(&hidp_proto);
311 return err;
312}
313
314void __exit hidp_cleanup_sockets(void)
315{
316 bt_procfs_cleanup(&init_net, "hidp");
317 bt_sock_unregister(BTPROTO_HIDP);
318 proto_unregister(&hidp_proto);
319}