Home | History | Annotate | Line # | Download | only in libusbhid 
      1 /*	$NetBSD: descr.c,v 1.6 2015/12/31 20:35:21 jakllsch Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1999 Lennart Augustsson <augustss (at) 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 __RCSID("$NetBSD: descr.c,v 1.6 2015/12/31 20:35:21 jakllsch Exp $");
     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 
     41 #include <dev/usb/usb.h>
     42 
     43 #include "usbhid.h"
     44 #include "usbvar.h"
     45 
     46 report_desc_t
     47 hid_get_report_desc(int fd)
     48 {
     49 	struct usb_ctl_report_desc rep;
     50 
     51 	_DIAGASSERT(fd != -1);
     52 
     53 	rep.ucrd_size = 0;
     54 	if (ioctl(fd, USB_GET_REPORT_DESC, &rep) < 0)
     55 		return (NULL);
     56 
     57 	return hid_use_report_desc(rep.ucrd_data, (unsigned int)rep.ucrd_size);
     58 }
     59 
     60 report_desc_t
     61 hid_use_report_desc(const uint8_t *data, unsigned int size)
     62 {
     63 	report_desc_t r;
     64 
     65 	r = malloc(sizeof(*r) + size);
     66 	if (r == NULL) {
     67 		errno = ENOMEM;
     68 		return (NULL);
     69 	}
     70 	r->size = size;
     71 	memcpy(r->data, data, size);
     72 	return (r);
     73 }
     74 
     75 void
     76 hid_dispose_report_desc(report_desc_t r)
     77 {
     78 
     79 	free(r);
     80 }
     81