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/* convert.c
Safe copying of option values into and out of the option buffer, which
can't be assumed to be aligned. */
/*
* Copyright (c) 2004-2017 by Internet Systems Consortium, Inc. ("ISC")
* Copyright (c) 1996-2003 by Internet Software Consortium
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
* ANY SPECIAL, DIRECT, 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.
*
* Internet Systems Consortium, Inc.
* 950 Charter Street
* Redwood City, CA 94063
* <info@isc.org>
* https://www.isc.org/
*
*/
#include "dhcpd.h"
#include <omapip/omapip_p.h>
u_int32_t getULong (buf)
const unsigned char *buf;
{
u_int32_t ibuf;
memcpy (&ibuf, buf, sizeof (u_int32_t));
return ntohl (ibuf);
}
int32_t getLong (buf)
const unsigned char *buf;
{
int32_t ibuf;
memcpy (&ibuf, buf, sizeof (int32_t));
return ntohl (ibuf);
}
u_int32_t getUShort (buf)
const unsigned char *buf;
{
unsigned short ibuf;
memcpy (&ibuf, buf, sizeof (u_int16_t));
return ntohs (ibuf);
}
int32_t getShort (buf)
const unsigned char *buf;
{
short ibuf;
memcpy (&ibuf, buf, sizeof (int16_t));
return ntohs (ibuf);
}
void putULong (obuf, val)
unsigned char *obuf;
u_int32_t val;
{
u_int32_t tmp = htonl (val);
memcpy (obuf, &tmp, sizeof tmp);
}
void putLong (obuf, val)
unsigned char *obuf;
int32_t val;
{
int32_t tmp = htonl (val);
memcpy (obuf, &tmp, sizeof tmp);
}
void putUShort (obuf, val)
unsigned char *obuf;
u_int32_t val;
{
u_int16_t tmp = htons (val);
memcpy (obuf, &tmp, sizeof tmp);
}
void putShort (obuf, val)
unsigned char *obuf;
int32_t val;
{
int16_t tmp = htons (val);
memcpy (obuf, &tmp, sizeof tmp);
}
void putUChar (obuf, val)
unsigned char *obuf;
u_int32_t val;
{
*obuf = val;
}
u_int32_t getUChar (obuf)
const unsigned char *obuf;
{
return obuf [0];
}
int converted_length (buf, base, width)
const unsigned char *buf;
unsigned int base;
unsigned int width;
{
u_int32_t number;
u_int32_t column;
int power = 1;
u_int32_t newcolumn = base;
if (base > 16)
return 0;
if (width == 1)
number = getUChar (buf);
else if (width == 2)
number = getUShort (buf);
else if (width == 4)
number = getULong (buf);
else
return 0;
do {
column = newcolumn;
if (number < column)
return power;
power++;
newcolumn = column * base;
/* If we wrap around, it must be the next power of two up. */
} while (newcolumn > column);
return power;
}
int binary_to_ascii (outbuf, inbuf, base, width)
unsigned char *outbuf;
const unsigned char *inbuf;
unsigned int base;
unsigned int width;
{
u_int32_t number;
static char h2a [] = "0123456789abcdef";
int power = converted_length (inbuf, base, width);
int i;
if (base > 16)
return 0;
if (width == 1)
number = getUChar (inbuf);
else if (width == 2)
number = getUShort (inbuf);
else if (width == 4)
number = getULong (inbuf);
else
return 0;
for (i = power - 1 ; i >= 0; i--) {
outbuf [i] = h2a [number % base];
number /= base;
}
return power;
}
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