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/* $OpenBSD: attribute.c,v 1.8 2000/02/25 17:23:38 niklas Exp $ */
/* $EOM: attribute.c,v 1.10 2000/02/20 19:58:36 niklas Exp $ */
/*
* Copyright (c) 1998, 1999 Niklas Hallqvist. 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Ericsson Radio Systems.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 code was written under funding by Ericsson Radio Systems.
*/
#include <sys/types.h>
#include <string.h>
#include "sysdep.h"
#include "attribute.h"
#include "conf.h"
#include "log.h"
#include "isakmp.h"
#include "util.h"
u_int8_t *
attribute_set_basic (u_int8_t *buf, u_int16_t type, u_int16_t value)
{
SET_ISAKMP_ATTR_TYPE (buf, ISAKMP_ATTR_MAKE (1, type));
SET_ISAKMP_ATTR_LENGTH_VALUE (buf, value);
return buf + ISAKMP_ATTR_VALUE_OFF;
}
u_int8_t *
attribute_set_var (u_int8_t *buf, u_int16_t type, u_int8_t *value,
u_int16_t len)
{
SET_ISAKMP_ATTR_TYPE (buf, ISAKMP_ATTR_MAKE (0, type));
SET_ISAKMP_ATTR_LENGTH_VALUE (buf, len);
memcpy (buf + ISAKMP_ATTR_VALUE_OFF, value, len);
return buf + ISAKMP_ATTR_VALUE_OFF + len;
}
/*
* Execute a function FUNC taking an attribute type, value, length and ARG
* as arguments for each attribute in the area of ISAKMP attributes located
* at BUF, sized SZ. If any invocation fails, the processing aborts with a
* -1 return value. If all goes well return zero.
*/
int
attribute_map (u_int8_t *buf, size_t sz,
int (*func) (u_int16_t, u_int8_t *, u_int16_t, void *),
void *arg)
{
u_int8_t *attr;
int fmt;
u_int16_t type;
u_int8_t *value;
u_int16_t len;
for (attr = buf; attr < buf + sz; attr = value + len)
{
if (attr + ISAKMP_ATTR_VALUE_OFF > buf + sz)
return -1;
type = GET_ISAKMP_ATTR_TYPE (attr);
fmt = ISAKMP_ATTR_FORMAT (type);
type = ISAKMP_ATTR_TYPE (type);
value
= attr + (fmt ? ISAKMP_ATTR_LENGTH_VALUE_OFF : ISAKMP_ATTR_VALUE_OFF);
len = (fmt ? ISAKMP_ATTR_LENGTH_VALUE_LEN
: GET_ISAKMP_ATTR_LENGTH_VALUE (attr));
if (value + len > buf + sz)
return -1;
if (func (type, value, len, arg))
return -1;
}
return 0;
}
int
attribute_set_constant (char *section, char *tag, struct constant_map *map,
int attr_class, u_int8_t **attr)
{
char *name;
int value;
name = conf_get_str (section, tag);
if (!name)
{
LOG_DBG ((LOG_MISC, 70,
"attribute_set_constant: no %s in the %s section", tag,
section));
return -1;
}
value = constant_value (map, name);
*attr = attribute_set_basic (*attr, attr_class, value);
return 0;
}
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