summaryrefslogtreecommitdiffstats
path: root/net/bluetooth/hidp/sock.c
blob: 2151913892ce8705d093a96fa65c3888e8a6dbb1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
/*
   HIDP implementation for Linux Bluetooth stack (BlueZ).
   Copyright (C) 2003-2004 Marcel Holtmann <marcel@holtmann.org>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License version 2 as
   published by the Free Software Foundation;

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
   SOFTWARE IS DISCLAIMED.
*/

#include <linux/export.h>
#include <linux/file.h>

#include "hidp.h"

static struct bt_sock_list hidp_sk_list = {
	.lock = __RW_LOCK_UNLOCKED(hidp_sk_list.lock)
};

static int hidp_sock_release(struct socket *sock)
{
	struct sock *sk = sock->sk;

	BT_DBG("sock %p sk %p", sock, sk);

	if (!sk)
		return 0;

	bt_sock_unlink(&hidp_sk_list, sk);

	sock_orphan(sk);
	sock_put(sk);

	return 0;
}

static int do_hidp_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp)
{
	struct hidp_connadd_req ca;
	struct hidp_conndel_req cd;
	struct hidp_connlist_req cl;
	struct hidp_conninfo ci;
	struct socket *csock;
	struct socket *isock;
	int err;

	BT_DBG("cmd %x arg %p", cmd, argp);

	switch (cmd) {
	case HIDPCONNADD:
		if (!capable(CAP_NET_ADMIN))
			return -EPERM;

		if (copy_from_user(&ca, argp, sizeof(ca)))
			return -EFAULT;

		csock = sockfd_lookup(ca.ctrl_sock, &err);
		if (!csock)
			return err;

		isock = sockfd_lookup(ca.intr_sock, &err);
		if (!isock) {
			sockfd_put(csock);
			return err;
		}
		ca.name[sizeof(ca.name)-1] = 0;

		err = hidp_connection_add(&ca, csock, isock);
		if (!err && copy_to_user(argp, &ca, sizeof(ca)))
			err = -EFAULT;

		sockfd_put(csock);
		sockfd_put(isock);

		return err;

	case HIDPCONNDEL:
		if (!capable(CAP_NET_ADMIN))
			return -EPERM;

		if (copy_from_user(&cd, argp, sizeof(cd)))
			return -EFAULT;

		return hidp_connection_del(&cd);

	case HIDPGETCONNLIST:
		if (copy_from_user(&cl, argp, sizeof(cl)))
			return -EFAULT;

		if (cl.cnum <= 0)
			return -EINVAL;

		err = hidp_get_connlist(&cl);
		if (!err && copy_to_user(argp, &cl, sizeof(cl)))
			return -EFAULT;

		return err;

	case HIDPGETCONNINFO:
		if (copy_from_user(&ci, argp, sizeof(ci)))
			return -EFAULT;

		err = hidp_get_conninfo(&ci);
		if (!err && copy_to_user(argp, &ci, sizeof(ci)))
			return -EFAULT;

		return err;
	}

	return -EINVAL;
}

static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
	return do_hidp_sock_ioctl(sock, cmd, (void __user *)arg);
}

#ifdef CONFIG_COMPAT
struct compat_hidp_connadd_req {
	int   ctrl_sock;	/* Connected control socket */
	int   intr_sock;	/* Connected interrupt socket */
	__u16 parser;
	__u16 rd_size;
	compat_uptr_t rd_data;
	__u8  country;
	__u8  subclass;
	__u16 vendor;
	__u16 product;
	__u16 version;
	__u32 flags;
	__u32 idle_to;
	char  name[128];
};

static int hidp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
	void __user *argp = compat_ptr(arg);
	int err;

	if (cmd == HIDPGETCONNLIST) {
		struct hidp_connlist_req cl;
		u32 __user *p = argp;
		u32 uci;

		if (get_user(cl.cnum, p) || get_user(uci, p + 1))
			return -EFAULT;

		cl.ci = compat_ptr(uci);

		if (cl.cnum <= 0)
			return -EINVAL;

		err = hidp_get_connlist(&cl);

		if (!err && put_user(cl.cnum, p))
			err = -EFAULT;

		return err;
	} else if (cmd == HIDPCONNADD) {
		struct compat_hidp_connadd_req ca32;
		struct hidp_connadd_req ca;
		struct socket *csock;
		struct socket *isock;

		if (!capable(CAP_NET_ADMIN))
			return -EPERM;

		if (copy_from_user(&ca32, (void __user *) arg, sizeof(ca32)))
			return -EFAULT;

		ca.ctrl_sock = ca32.ctrl_sock;
		ca.intr_sock = ca32.intr_sock;
		ca.parser = ca32.parser;
		ca.rd_size = ca32.rd_size;
		ca.rd_data = compat_ptr(ca32.rd_data);
		ca.country = ca32.country;
		ca.subclass = ca32.subclass;
		ca.vendor = ca32.vendor;
		ca.product = ca32.product;
		ca.version = ca32.version;
		ca.flags = ca32.flags;
		ca.idle_to = ca32.idle_to;
		memcpy(ca.name, ca32.name, 128);

		csock = sockfd_lookup(ca.ctrl_sock, &err);
		if (!csock)
			return err;

		isock = sockfd_lookup(ca.intr_sock, &err);
		if (!isock) {
			sockfd_put(csock);
			return err;
		}

		err = hidp_connection_add(&ca, csock, isock);
		if (!err && copy_to_user(argp, &ca32, sizeof(ca32)))
			err = -EFAULT;

		sockfd_put(csock);
		sockfd_put(isock);

		return err;
	}

	return hidp_sock_ioctl(sock, cmd, arg);
}
#endif

static const struct proto_ops hidp_sock_ops = {
	.family		= PF_BLUETOOTH,
	.owner		= THIS_MODULE,
	.release	= hidp_sock_release,
	.ioctl		= hidp_sock_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl	= hidp_sock_compat_ioctl,
#endif
	.bind		= sock_no_bind,
	.getname	= sock_no_getname,
	.sendmsg	= sock_no_sendmsg,
	.recvmsg	= sock_no_recvmsg,
	.listen		= sock_no_listen,
	.shutdown	= sock_no_shutdown,
	.setsockopt	= sock_no_setsockopt,
	.getsockopt	= sock_no_getsockopt,
	.connect	= sock_no_connect,
	.socketpair	= sock_no_socketpair,
	.accept		= sock_no_accept,
	.mmap		= sock_no_mmap
};

static struct proto hidp_proto = {
	.name		= "HIDP",
	.owner		= THIS_MODULE,
	.obj_size	= sizeof(struct bt_sock)
};

static int hidp_sock_create(struct net *net, struct socket *sock, int protocol,
			    int kern)
{
	struct sock *sk;

	BT_DBG("sock %p", sock);

	if (sock->type != SOCK_RAW)
		return -ESOCKTNOSUPPORT;

	sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hidp_proto, kern);
	if (!sk)
		return -ENOMEM;

	sock_init_data(sock, sk);

	sock->ops = &hidp_sock_ops;

	sock->state = SS_UNCONNECTED;

	sock_reset_flag(sk, SOCK_ZAPPED);

	sk->sk_protocol = protocol;
	sk->sk_state	= BT_OPEN;

	bt_sock_link(&hidp_sk_list, sk);

	return 0;
}

static const struct net_proto_family hidp_sock_family_ops = {
	.family	= PF_BLUETOOTH,
	.owner	= THIS_MODULE,
	.create	= hidp_sock_create
};

int __init hidp_init_sockets(void)
{
	int err;

	err = proto_register(&hidp_proto, 0);
	if (err < 0)
		return err;

	err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops);
	if (err < 0) {
		BT_ERR("Can't register HIDP socket");
		goto error;
	}

	err = bt_procfs_init(&init_net, "hidp", &hidp_sk_list, NULL);
	if (err < 0) {
		BT_ERR("Failed to create HIDP proc file");
		bt_sock_unregister(BTPROTO_HIDP);
		goto error;
	}

	BT_INFO("HIDP socket layer initialized");

	return 0;

error:
	proto_unregister(&hidp_proto);
	return err;
}

void __exit hidp_cleanup_sockets(void)
{
	bt_procfs_cleanup(&init_net, "hidp");
	bt_sock_unregister(BTPROTO_HIDP);
	proto_unregister(&hidp_proto);
}