224 lines
5.1 KiB
C
224 lines
5.1 KiB
C
/*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 2001 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <string.h>
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#include <ftypes-int.h>
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#include <epan/ipv4.h>
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#include <epan/addr_resolv.h>
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#include <epan/emem.h>
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static void
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set_uinteger(fvalue_t *fv, guint32 value)
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{
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ipv4_addr_set_net_order_addr(&(fv->value.ipv4), value);
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ipv4_addr_set_netmask_bits(&(fv->value.ipv4), 32);
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}
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static gpointer
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value_get(fvalue_t *fv)
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{
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return &(fv->value.ipv4);
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}
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static gboolean
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val_from_unparsed(fvalue_t *fv, char *s, gboolean allow_partial_value _U_, LogFunc logfunc)
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{
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guint32 addr;
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unsigned int nmask_bits;
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char *has_slash, *s_copy = NULL;
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char *net_str, *addr_str;
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fvalue_t *nmask_fvalue;
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/* Look for CIDR: Is there a single slash in the string? */
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has_slash = strchr(s, '/');
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if (has_slash) {
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/* Make a copy of the string and use strtok() to
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* get the address portion. */
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s_copy = ep_strdup(s);
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addr_str = strtok(s_copy, "/");
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/* I just checked for slash! I shouldn't get NULL here.
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* Double check just in case. */
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if (!addr_str) {
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logfunc("Unexpected strtok() error parsing IP address: %s",
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s_copy);
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return FALSE;
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}
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}
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else {
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addr_str = s;
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}
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if (!get_host_ipaddr(addr_str, &addr)) {
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logfunc("\"%s\" is not a valid hostname or IPv4 address.",
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addr_str);
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return FALSE;
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}
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ipv4_addr_set_net_order_addr(&(fv->value.ipv4), addr);
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/* If CIDR, get netmask bits. */
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if (has_slash) {
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net_str = strtok(NULL, "/");
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/* I checked for slash! I shouldn't get NULL here.
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* Double check just in case. */
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if (!net_str) {
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logfunc("Unexpected strtok() error parsing netmask: %s",
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s_copy);
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return FALSE;
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}
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/* XXX - this is inefficient */
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nmask_fvalue = fvalue_from_unparsed(FT_UINT32, net_str, FALSE, logfunc);
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if (!nmask_fvalue) {
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return FALSE;
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}
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nmask_bits = fvalue_get_uinteger(nmask_fvalue);
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FVALUE_FREE(nmask_fvalue);
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if (nmask_bits > 32) {
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logfunc("Netmask bits in a CIDR IPv4 address should be <= 32, not %u",
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nmask_bits);
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return FALSE;
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}
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ipv4_addr_set_netmask_bits(&fv->value.ipv4, nmask_bits);
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}
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else {
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/* Not CIDR; mask covers entire address. */
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ipv4_addr_set_netmask_bits(&(fv->value.ipv4), 32);
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}
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return TRUE;
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}
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static int
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val_repr_len(fvalue_t *fv _U_, ftrepr_t rtype _U_)
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{
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/*
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* 15 characters for "XXX.XXX.XXX.XXX".
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*/
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return 15;
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}
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static void
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val_to_repr(fvalue_t *fv, ftrepr_t rtype _U_, char *buf)
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{
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ipv4_addr_str_buf(&fv->value.ipv4, buf);
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}
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static gboolean
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cmp_eq(const fvalue_t *a, const fvalue_t *b)
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{
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return ipv4_addr_eq(&a->value.ipv4, &b->value.ipv4);
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}
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static gboolean
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cmp_ne(const fvalue_t *a, const fvalue_t *b)
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{
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return ipv4_addr_ne(&a->value.ipv4, &b->value.ipv4);
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}
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static gboolean
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cmp_gt(const fvalue_t *a, const fvalue_t *b)
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{
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return ipv4_addr_gt(&a->value.ipv4, &b->value.ipv4);
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}
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static gboolean
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cmp_ge(const fvalue_t *a, const fvalue_t *b)
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{
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return ipv4_addr_ge(&a->value.ipv4, &b->value.ipv4);
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}
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static gboolean
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cmp_lt(const fvalue_t *a, const fvalue_t *b)
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{
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return ipv4_addr_lt(&a->value.ipv4, &b->value.ipv4);
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}
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static gboolean
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cmp_le(const fvalue_t *a, const fvalue_t *b)
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{
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return ipv4_addr_le(&a->value.ipv4, &b->value.ipv4);
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}
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static gboolean
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cmp_bitwise_and(const fvalue_t *fv_a, const fvalue_t *fv_b)
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{
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guint32 addr_a;
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guint32 addr_b;
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addr_a = fv_a->value.ipv4.addr & fv_a->value.ipv4.nmask;
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addr_b = fv_b->value.ipv4.addr & fv_b->value.ipv4.nmask;
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return ((addr_a & addr_b) != 0);
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}
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void
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ftype_register_ipv4(void)
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{
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static ftype_t ipv4_type = {
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FT_IPv4, /* ftype */
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"FT_IPv4", /* name */
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"IPv4 address", /* pretty_name */
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4, /* wire_size */
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NULL, /* new_value */
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NULL, /* free_value */
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val_from_unparsed, /* val_from_unparsed */
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NULL, /* val_from_string */
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val_to_repr, /* val_to_string_repr */
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val_repr_len, /* len_string_repr */
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NULL, /* set_value */
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set_uinteger, /* set_value_uinteger */
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NULL, /* set_value_sinteger */
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NULL, /* set_value_integer64 */
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NULL, /* set_value_floating */
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value_get, /* get_value */
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NULL, /* get_value_uinteger */
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NULL, /* get_value_sinteger */
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NULL, /* get_value_integer64 */
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NULL, /* get_value_floating */
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cmp_eq,
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cmp_ne,
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cmp_gt,
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cmp_ge,
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cmp_lt,
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cmp_le,
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cmp_bitwise_and,
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NULL, /* cmp_contains */
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NULL, /* cmp_matches */
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NULL,
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NULL,
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};
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ftype_register(FT_IPv4, &ipv4_type);
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}
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