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/*
* $Id$
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 2001 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <ftypes-int.h>
#include <epan/ipv4.h>
#include <epan/addr_resolv.h>
static void
set_integer(fvalue_t *fv, guint32 value)
{
ipv4_addr_set_net_order_addr(&(fv->value.ipv4), value);
ipv4_addr_set_netmask_bits(&(fv->value.ipv4), 32);
}
static gpointer
value_get(fvalue_t *fv)
{
return &(fv->value.ipv4);
}
static gboolean
val_from_unparsed(fvalue_t *fv, char *s, gboolean allow_partial_value _U_, LogFunc logfunc)
{
guint32 addr;
unsigned int nmask_bits;
char *has_slash, *s_copy = NULL;
char *net_str, *addr_str;
fvalue_t *nmask_fvalue;
/* Look for CIDR: Is there a single slash in the string? */
has_slash = strchr(s, '/');
if (has_slash) {
/* Make a copy of the string and use strtok() to
* get the address portion. */
s_copy = g_strdup(s);
addr_str = strtok(s_copy, "/");
/* I just checked for slash! I shouldn't get NULL here.
* Double check just in case. */
if (!addr_str) {
logfunc("Unexpected strtok() error parsing IP address: %s",
s_copy);
g_free(s_copy);
return FALSE;
}
}
else {
addr_str = s;
}
if (!get_host_ipaddr(addr_str, &addr)) {
logfunc("\"%s\" is not a valid hostname or IPv4 address.",
addr_str);
if (has_slash) {
g_free(s_copy);
}
return FALSE;
}
ipv4_addr_set_host_order_addr(&(fv->value.ipv4), addr);
/* If CIDR, get netmask bits. */
if (has_slash) {
net_str = strtok(NULL, "/");
/* I checked for slash! I shouldn't get NULL here.
* Double check just in case. */
if (!net_str) {
logfunc("Unexpected strtok() error parsing netmask: %s",
s_copy);
g_free(s_copy);
return FALSE;
}
/* XXX - this is inefficient */
nmask_fvalue = fvalue_from_unparsed(FT_UINT32, net_str, FALSE, logfunc);
g_free(s_copy);
if (!nmask_fvalue) {
return FALSE;
}
nmask_bits = fvalue_get_integer(nmask_fvalue);
FVALUE_FREE(nmask_fvalue);
if (nmask_bits > 32) {
logfunc("Netmask bits in a CIDR IPv4 address should be <= 32, not %u",
nmask_bits);
return FALSE;
}
ipv4_addr_set_netmask_bits(&fv->value.ipv4, nmask_bits);
}
else {
/* Not CIDR; mask covers entire address. */
ipv4_addr_set_netmask_bits(&(fv->value.ipv4), 32);
}
return TRUE;
}
static int
val_repr_len(fvalue_t *fv _U_, ftrepr_t rtype _U_)
{
/*
* 15 characters for "XXX.XXX.XXX.XXX".
*/
return 15;
}
static void
val_to_repr(fvalue_t *fv, ftrepr_t rtype _U_, char *buf)
{
ipv4_addr_str_buf(&fv->value.ipv4, buf);
}
static gboolean
cmp_eq(fvalue_t *a, fvalue_t *b)
{
return ipv4_addr_eq(&a->value.ipv4, &b->value.ipv4);
}
static gboolean
cmp_ne(fvalue_t *a, fvalue_t *b)
{
return ipv4_addr_ne(&a->value.ipv4, &b->value.ipv4);
}
static gboolean
cmp_gt(fvalue_t *a, fvalue_t *b)
{
return ipv4_addr_gt(&a->value.ipv4, &b->value.ipv4);
}
static gboolean
cmp_ge(fvalue_t *a, fvalue_t *b)
{
return ipv4_addr_ge(&a->value.ipv4, &b->value.ipv4);
}
static gboolean
cmp_lt(fvalue_t *a, fvalue_t *b)
{
return ipv4_addr_lt(&a->value.ipv4, &b->value.ipv4);
}
static gboolean
cmp_le(fvalue_t *a, fvalue_t *b)
{
return ipv4_addr_le(&a->value.ipv4, &b->value.ipv4);
}
static gboolean cmp_bytes_bitwise_and(fvalue_t *fv_a, fvalue_t *fv_b)
{
GByteArray *a = fv_a->value.bytes;
GByteArray *b = fv_b->value.bytes;
guint i = 0;
unsigned char *p_a, *p_b;
if (b->len != a->len) {
return FALSE;
}
p_a = a->data;
p_b = b->data;
while (i < b->len) {
if (p_a[i] & p_b[i])
i++;
else
return FALSE;
}
return TRUE;
}
void
ftype_register_ipv4(void)
{
static ftype_t ipv4_type = {
FT_IPv4, /* ftype */
"FT_IPv4", /* name */
"IPv4 address", /* pretty_name */
4, /* wire_size */
NULL, /* new_value */
NULL, /* free_value */
val_from_unparsed, /* val_from_unparsed */
NULL, /* val_from_string */
val_to_repr, /* val_to_string_repr */
val_repr_len, /* len_string_repr */
NULL, /* set_value */
set_integer, /* set_value_integer */
NULL, /* set_value_integer64 */
NULL, /* set_value_floating */
value_get, /* get_value */
NULL, /* get_value_integer */
NULL, /* get_value_integer64 */
NULL, /* get_value_floating */
cmp_eq,
cmp_ne,
cmp_gt,
cmp_ge,
cmp_lt,
cmp_le,
cmp_bytes_bitwise_and,
NULL, /* cmp_contains */
NULL, /* cmp_matches */
NULL,
NULL,
};
ftype_register(FT_IPv4, &ipv4_type);
}
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