descr.c revision 113273 
1/*	$NetBSD: descr.c,v 1.9 2000/09/24 02:13:24 augustss Exp $	*/
2
3/*
4 * Copyright (c) 1999 Lennart Augustsson <augustss@netbsd.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: head/lib/libusbhid/descr.c 113273 2003-04-09 01:52:49Z mdodd $");
31
32#include <sys/types.h>
33
34#include <assert.h>
35#include <errno.h>
36#include <stdlib.h>
37#include <string.h>
38#include <unistd.h>
39#include <sys/time.h>
40#include <sys/ioctl.h>
41
42#include <dev/usb/usb.h>
43
44#include "usbhid.h"
45#include "usbvar.h"
46
47report_desc_t
48hid_get_report_desc(int fd)
49{
50	struct usb_ctl_report_desc rep;
51
52	rep.ucrd_size = 0;
53	if (ioctl(fd, USB_GET_REPORT_DESC, &rep) < 0)
54		return (NULL);
55
56	return hid_use_report_desc(rep.ucrd_data, (unsigned int)rep.ucrd_size);
57}
58
59report_desc_t
60hid_use_report_desc(unsigned char *data, unsigned int size)
61{
62	report_desc_t r;
63
64	r = malloc(sizeof(*r) + size);
65	if (r == 0) {
66		errno = ENOMEM;
67		return (NULL);
68	}
69	r->size = size;
70	memcpy(r->data, data, size);
71	return (r);
72}
73
74void
75hid_dispose_report_desc(report_desc_t r)
76{
77
78	free(r);
79}
80