forked from osmocom/wireshark
![Guy Harris](/assets/img/avatar_default.png)
function that computes the natural logarithm of a double. Using it as the name of a pointer to a routine to do logging can cause namespace collisions; in fact, it *does* cause them on AIX. Rename the function argument to "logfunc". svn path=/trunk/; revision=4700
193 lines
4 KiB
C
193 lines
4 KiB
C
/*
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* $Id: ftype-ipv4.c,v 1.8 2002/02/05 22:50:17 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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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/resolv.h>
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static void
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set_integer(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_string(fvalue_t *fv, char *s, 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 = g_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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g_free(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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if (has_slash) {
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g_free(s_copy);
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}
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return FALSE;
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}
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ipv4_addr_set_host_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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g_free(s_copy);
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return FALSE;
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}
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nmask_fvalue = fvalue_from_string(FT_UINT32, net_str, logfunc);
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g_free(s_copy);
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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_integer(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 gboolean
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cmp_eq(fvalue_t *a, 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(fvalue_t *a, 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(fvalue_t *a, 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(fvalue_t *a, 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(fvalue_t *a, 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(fvalue_t *a, 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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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",
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"IPv4 address",
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4,
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NULL,
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NULL,
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val_from_string,
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NULL,
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set_integer,
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NULL,
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value_get,
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NULL,
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NULL,
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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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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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