xref: /openbsd-src/usr.sbin/dhcpd/convert.c (revision 837cddff4b95f9432151663c8b92d709c11482aa)

/*	$OpenBSD: convert.c,v 1.5 2016/02/06 23:50:10 krw Exp $	*/

/*
 * Safe copying of option values into and out of the option buffer,
 * which can't be assumed to be aligned.
 */

/*
 * Copyright (c) 1995, 1996 The Internet Software Consortium.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of The Internet Software Consortium nor the names
 *    of its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * This software has been written for the Internet Software Consortium
 * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
 * Enterprises.  To learn more about the Internet Software Consortium,
 * see ``http://www.vix.com/isc''.  To learn more about Vixie
 * Enterprises, see ``http://www.vix.com''.
 */

#include <sys/types.h>
#include <sys/socket.h>

#include <net/if.h>

#include <netinet/in.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "dhcp.h"
#include "tree.h"
#include "dhcpd.h"

u_int32_t
getULong(unsigned char *buf)
{
	u_int32_t ibuf;

	memcpy(&ibuf, buf, sizeof(ibuf));
	return (ntohl(ibuf));
}

u_int16_t
getUShort(unsigned char *buf)
{
	u_int16_t ibuf;

	memcpy(&ibuf, buf, sizeof(ibuf));
	return (ntohs(ibuf));
}

void
putULong(unsigned char *obuf, u_int32_t val)
{
	u_int32_t tmp = htonl(val);

	memcpy(obuf, &tmp, sizeof(tmp));
}

void
putLong(unsigned char *obuf, int32_t val)
{
	int32_t tmp = htonl(val);

	memcpy(obuf, &tmp, sizeof(tmp));
}

void
putUShort(unsigned char *obuf, unsigned int val)
{
	u_int16_t tmp = htons(val);

	memcpy(obuf, &tmp, sizeof(tmp));
}

void
putShort(unsigned char *obuf, int val)
{
	int16_t tmp = htons(val);

	memcpy(obuf, &tmp, sizeof(tmp));
}