forked from osmocom/wireshark
168 lines
3.6 KiB
C
168 lines
3.6 KiB
C
/* ipv4.c
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*
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* IPv4 address class. They understand how to take netmasks into consideration
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* during equivalence testing.
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*
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* Gilbert Ramirez <gram@alumni.rice.edu>
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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 1998 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 <glib.h>
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#include <stdio.h>
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#include "ipv4.h"
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#include "to_str.h"
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#include "addr_and_mask.h"
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ipv4_addr_and_mask*
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ipv4_addr_and_mask_new(void)
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{
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ipv4_addr_and_mask *ipv4;
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ipv4 = g_new(ipv4_addr_and_mask, 1);
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return ipv4;
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}
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void
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ipv4_addr_and_mask_free(ipv4_addr_and_mask *ipv4)
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{
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g_free(ipv4);
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}
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void
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ipv4_addr_and_mask_set_host_order_addr(ipv4_addr_and_mask *ipv4, const guint32 new_addr)
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{
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ipv4->addr = new_addr;
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}
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void
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ipv4_addr_and_mask_set_net_order_addr(ipv4_addr_and_mask *ipv4, const guint32 new_addr)
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{
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ipv4->addr = g_ntohl(new_addr);
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}
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void
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ipv4_addr_and_mask_set_netmask_bits(ipv4_addr_and_mask *ipv4, const guint new_nmask_bits)
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{
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ipv4->nmask = ip_get_subnet_mask(new_nmask_bits);
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}
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guint32
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ipv4_get_net_order_addr(ipv4_addr_and_mask *ipv4)
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{
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return g_htonl(ipv4->addr);
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}
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guint32
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ipv4_get_host_order_addr(ipv4_addr_and_mask *ipv4)
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{
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return ipv4->addr;
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}
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/* We're assuming the buffer is at least MAX_IP_STR_LEN (16 bytes) */
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void
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ipv4_addr_and_mask_str_buf(const ipv4_addr_and_mask *ipv4, gchar *buf)
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{
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guint32 ipv4_host_order = g_htonl(ipv4->addr);
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ip_to_str_buf((guint8*)&ipv4_host_order, buf, MAX_IP_STR_LEN);
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}
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/*
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* w.x.y.z/32 eq w.x.y.0/24 TRUE
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*/
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/* Returns TRUE if equal, FALSE if not */
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gboolean
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ipv4_addr_and_mask_eq(const ipv4_addr_and_mask *a, const ipv4_addr_and_mask *b)
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{
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guint32 val_a, val_b, nmask;
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nmask = MIN(a->nmask, b->nmask);
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val_a = a->addr & nmask;
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val_b = b->addr & nmask;
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return (val_a == val_b);
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}
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gboolean
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ipv4_addr_and_mask_gt(const ipv4_addr_and_mask *a, const ipv4_addr_and_mask *b)
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{
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guint32 val_a, val_b, nmask;
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nmask = MIN(a->nmask, b->nmask);
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val_a = a->addr & nmask;
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val_b = b->addr & nmask;
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return (val_a > val_b);
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}
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gboolean
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ipv4_addr_and_mask_ge(const ipv4_addr_and_mask *a, const ipv4_addr_and_mask *b)
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{
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guint32 val_a, val_b, nmask;
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nmask = MIN(a->nmask, b->nmask);
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val_a = a->addr & nmask;
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val_b = b->addr & nmask;
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return (val_a >= val_b);
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}
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gboolean
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ipv4_addr_and_mask_lt(const ipv4_addr_and_mask *a, const ipv4_addr_and_mask *b)
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{
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guint32 val_a, val_b, nmask;
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nmask = MIN(a->nmask, b->nmask);
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val_a = a->addr & nmask;
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val_b = b->addr & nmask;
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return (val_a < val_b);
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}
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gboolean
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ipv4_addr_and_mask_le(const ipv4_addr_and_mask *a, const ipv4_addr_and_mask *b)
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{
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guint32 val_a, val_b, nmask;
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nmask = MIN(a->nmask, b->nmask);
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val_a = a->addr & nmask;
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val_b = b->addr & nmask;
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return (val_a <= val_b);
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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