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/*
* Copyright (c) 2002, 2003 Niels Provos <provos@citi.umich.edu>
* All rights reserved.
*
* 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
* 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
*/
#include <sys/types.h>
#include <sys/param.h>
#include "config.h"
#include <sys/queue.h>
#include <sys/tree.h>
#include <pcap.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <dumbnet.h>
#undef timeout_pending
#undef timeout_initialized
#include <event.h>
#include "network.h"
/*
* compare 2 v4 ranges
*/
enum net_order
network_compare(struct network *a, struct network *b)
{
struct addr addr_a, addr_b;
struct addr addr_aend, addr_bend;
/* Set up the addresses; still IPv4 dependent */
addr_a = a->net;
addr_a.addr_bits = IP_ADDR_BITS;
addr_b = b->net;
addr_b.addr_bits = IP_ADDR_BITS;
addr_bcast(&a->net, &addr_aend);
addr_aend.addr_bits = IP_ADDR_BITS;
addr_bcast(&b->net, &addr_bend);
addr_bend.addr_bits = IP_ADDR_BITS;
if (addr_cmp(&addr_aend, &addr_b) < 0)
return (NET_PRECEEDS);
if (addr_cmp(&addr_a, &addr_bend) > 0)
return (NET_FOLLOWS);
if (addr_cmp(&addr_a, &addr_b) <= 0 &&
addr_cmp(&addr_aend, &addr_bend) >= 0){
if (addr_cmp(&a->net, &b->net) == 0)
return (NET_EQUALS);
return (NET_CONTAINS);
}
return (NET_CONTAINED);
}
/* Unittests */
static void
network_test_compare(void)
{
struct addr one, two;
struct network net_one, net_two;
addr_pton("1.0.0.0/24", &one);
addr_pton("2.0.0.0/24", &two);
net_one.net = one;
net_two.net = two;
if (network_compare(&net_one, &net_two) != NET_PRECEEDS)
errx(1, "network_compare");
if (network_compare(&net_two, &net_one) != NET_FOLLOWS)
errx(1, "network_compare");
if (network_compare(&net_two, &net_two) != NET_EQUALS)
errx(1, "network_compare");
addr_pton("2.1.0.0/24", &one);
addr_pton("2.0.0.0/8", &two);
net_one.net = one;
net_two.net = two;
if (network_compare(&net_one, &net_two) != NET_CONTAINED)
errx(1, "network_compare: !contained");
if (network_compare(&net_two, &net_one) != NET_CONTAINS)
errx(1, "network_compare: !contains");
fprintf(stderr, "\t%s: OK\n", __func__);
}
void
network_test(void)
{
network_test_compare();
}
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