File: [local] / src / sbin / isakmpd / field.c (download)
Revision 1.8, Fri Feb 25 17:23:39 2000 UTC (24 years, 3 months ago) by niklas
Branch: MAIN
CVS Tags: OPENBSD_3_0_BASE, OPENBSD_3_0, OPENBSD_2_9_BASE, OPENBSD_2_9, OPENBSD_2_8_BASE, OPENBSD_2_8, OPENBSD_2_7_BASE, OPENBSD_2_7 Changes since 1.7: +3 -3 lines
regress/crypto/Makefile: Merge with EOM 1.5
regress/dh/Makefile: Merge with EOM 1.7
regress/group/Makefile: Merge with EOM 1.9
regress/prf/Makefile: Merge with EOM 1.4
regress/rsakeygen/Makefile: Merge with EOM 1.8
regress/x509/Makefile: Merge with EOM 1.10
Makefile: Merge with EOM 1.62
attribute.c: Merge with EOM 1.10
sa.c: Merge with EOM 1.99
conf.c: Merge with EOM 1.20
crypto.c: Merge with EOM 1.28
isakmpd.c: Merge with EOM 1.45
connection.c: Merge with EOM 1.19
doi.h: Merge with EOM 1.28
field.c: Merge with EOM 1.11
exchange.c: Merge with EOM 1.116
ike_auth.c: Merge with EOM 1.44
pf_key_v2.c: Merge with EOM 1.37
ike_phase_1.c: Merge with EOM 1.22
ipsec.c: Merge with EOM 1.118
isakmp_doi.c: Merge with EOM 1.40
log.c: Merge with EOM 1.26
log.h: Merge with EOM 1.18
math_group.c: Merge with EOM 1.23
message.c: Merge with EOM 1.144
pf_encap.c: Merge with EOM 1.70
policy.c: Merge with EOM 1.18
timer.c: Merge with EOM 1.13
transport.c: Merge with EOM 1.41
udp.c: Merge with EOM 1.47
ui.c: Merge with EOM 1.37
x509.c: Merge with EOM 1.36
author: niklas
Made debug logging a compile time selectable feature
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/* $OpenBSD: field.c,v 1.8 2000/02/25 17:23:39 niklas Exp $ */
/* $EOM: field.c,v 1.11 2000/02/20 19:58:37 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "sysdep.h"
#include "constants.h"
#include "field.h"
#include "log.h"
#include "util.h"
static char *field_debug_raw (u_int8_t *, size_t, struct constant_map **);
static char *field_debug_num (u_int8_t *, size_t, struct constant_map **);
static char *field_debug_mask (u_int8_t *, size_t, struct constant_map **);
static char *field_debug_ign (u_int8_t *, size_t, struct constant_map **);
static char *field_debug_cst (u_int8_t *, size_t, struct constant_map **);
/* Contents must match the enum in struct field. */
static char *(*decode_field[]) (u_int8_t *, size_t, struct constant_map **) = {
field_debug_raw,
field_debug_num,
field_debug_mask,
field_debug_ign,
field_debug_cst
};
/*
* Return a string showing the hexadecimal contents of the LEN-sized buffer
* BUF. MAPS should be zero and is only here because the API requires it.
*/
static char *
field_debug_raw (u_int8_t *buf, size_t len, struct constant_map **maps)
{
char *retval, *p;
if (len == 0)
return 0;
retval = malloc (3 + len * 2);
if (!retval)
return 0;
strcpy (retval, "0x");
p = retval + 2;
while (len--)
{
sprintf (p, "%02x", *buf++);
p += 2;
}
return retval;
}
/*
* Convert the unsigned LEN-sized number at BUF of network byteorder to a
* 32-bit unsigned integer of host byteorder pointed to by VAL.
*/
static int
extract_val (u_int8_t *buf, size_t len, u_int32_t *val)
{
switch (len)
{
case 1:
*val = *buf;
break;
case 2:
*val = decode_16 (buf);
break;
case 4:
*val = decode_32 (buf);
break;
default:
return -1;
}
return 0;
}
/*
* Return a textual representation of the unsigned number pointed to by BUF
* which is LEN octets long. MAPS should be zero and is only here because
* the API requires it.
*/
static char *
field_debug_num (u_int8_t *buf, size_t len, struct constant_map **maps)
{
char *retval;
u_int32_t val;
if (extract_val (buf, len, &val))
return 0;
/* 3 decimal digits are enough to represent each byte. */
retval = malloc (3 * len);
snprintf (retval, 3 * len, "%u", val);
return retval;
}
/*
* Return the symbolic names of the flags pointed to by BUF which is LEN
* octets long, using the constant maps MAPS.
*/
static char *
field_debug_mask (u_int8_t *buf, size_t len, struct constant_map **maps)
{
u_int32_t val;
u_int32_t bit;
char *retval, *new_buf, *name;
size_t buf_sz;
if (extract_val (buf, len, &val))
return 0;
/* Size for brackets, two spaces and a NUL terminator. */
buf_sz = 4;
retval = malloc (buf_sz);
if (!retval)
return 0;
strcpy (retval, "[ ");
for (bit = 1; bit; bit <<= 1)
{
if (val & bit)
{
name = constant_name_maps (maps, bit);
buf_sz += strlen (name) + 1;
new_buf = realloc (retval, buf_sz);
if (!new_buf)
{
free (retval);
return 0;
}
retval = new_buf;
strcat (retval, name);
strcat (retval, " ");
}
}
strcat (retval, "]");
return retval;
}
/*
* Just a dummy needed to skip the unused LEN sized space at BUF. MAPS
* should be zero and is only here because the API requires it.
*/
static char *
field_debug_ign (u_int8_t *buf, size_t len, struct constant_map **maps)
{
return 0;
}
/*
* Return the symbolic name of a constant pointed to by BUF which is LEN
* octets long, using the constant maps MAPS.
*/
static char *
field_debug_cst (u_int8_t *buf, size_t len, struct constant_map **maps)
{
u_int32_t val;
if (extract_val (buf, len, &val))
return 0;
return strdup (constant_name_maps (maps, val));
}
/* Pretty-print a field from BUF as described by F. */
void
field_dump_field (struct field *f, u_int8_t *buf)
{
char *value;
value = decode_field[(int)f->type] (buf + f->offset, f->len, f->maps);
if (value)
{
LOG_DBG ((LOG_MESSAGE, 70, "%s: %s", f->name, value));
free (value);
}
}
/* Pretty-print all the fields of BUF as described in FIELDS. */
void
field_dump_payload (struct field *fields, u_int8_t *buf)
{
struct field *field;
for (field = fields; field->name; field++)
field_dump_field (field, buf);
}
/* Return the numeric value of the field F of BUF. */
u_int32_t
field_get_num (struct field *f, u_int8_t *buf)
{
u_int32_t val;
if (extract_val (buf + f->offset, f->len, &val))
return 0;
return val;
}
/* Stash the number VAL into BUF's field F. */
void
field_set_num (struct field *f, u_int8_t *buf, u_int32_t val)
{
switch (f->len)
{
case 1:
buf[f->offset] = val;
break;
case 2:
encode_16 (buf + f->offset, val);
break;
case 4:
encode_32 (buf + f->offset, val);
break;
}
}
/* Stash BUF's raw field F into VAL. */
void
field_get_raw (struct field *f, u_int8_t *buf, u_int8_t *val)
{
memcpy (val, buf + f->offset, f->len);
}
/* Stash the buffer VAL into BUF's field F. */
void
field_set_raw (struct field *f, u_int8_t *buf, u_int8_t *val)
{
memcpy (buf + f->offset, val, f->len);
}