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/*
* Copyright (c) 2007-2013 Balabit
* Copyright (c) 2007-2013 Balázs Scheidler
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#include "dnscache.h"
#include "apphook.h"
#include "timeutils.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
void
test_expiration(void)
{
gint i;
const gchar *hn = NULL;
gsize hn_len;
gboolean positive;
DNSCacheOptions options =
{
.cache_size = 50000,
.expire = 3,
.expire_failed = 1,
.hosts = NULL
};
DNSCache *cache = dns_cache_new(&options);
for (i = 0; i < 10000; i++)
{
guint32 ni = htonl(i);
dns_cache_store_dynamic(cache, AF_INET, (void *) &ni, i < 5000 ? "hostname" : "negative", i < 5000);
}
for (i = 0; i < 10000; i++)
{
guint32 ni = htonl(i);
hn = NULL;
positive = FALSE;
if (!dns_cache_lookup(cache, AF_INET, (void *) &ni, &hn, &hn_len, &positive))
{
fprintf(stderr, "hmmm cache forgot the cache entry too early, i=%d, hn=%s\n", i, hn);
exit(1);
}
else
{
if (i < 5000)
{
if (!positive || strcmp(hn, "hostname") != 0)
{
fprintf(stderr, "hmm, cached returned an positive match, but cached name invalid, i=%d, hn=%s\n", i, hn);
exit(1);
}
}
else
{
if (positive || strcmp(hn, "negative") != 0)
{
fprintf(stderr, "hmm, cache returned a positive match, where a negative match was expected, i=%d, hn=%s\n", i, hn);
exit(1);
}
}
}
}
/* negative entries should expire by now, positive ones still present */
sleep(2);
invalidate_cached_time();
for (i = 0; i < 10000; i++)
{
guint32 ni = htonl(i);
hn = NULL;
positive = FALSE;
if (i < 5000)
{
if (!dns_cache_lookup(cache, AF_INET, (void *) &ni, &hn, &hn_len, &positive) || !positive)
{
fprintf(stderr, "hmmm cache forgot positive entries too early, i=%d\n", i);
exit(1);
}
}
else
{
if (dns_cache_lookup(cache, AF_INET, (void *) &ni, &hn, &hn_len, &positive) || positive)
{
fprintf(stderr, "hmmm cache didn't forget negative entries in time, i=%d\n", i);
exit(1);
}
}
}
/* everything should be expired by now */
sleep(2);
invalidate_cached_time();
for (i = 0; i < 10000; i++)
{
guint32 ni = htonl(i);
hn = NULL;
positive = FALSE;
if (dns_cache_lookup(cache, AF_INET, (void *) &ni, &hn, &hn_len, &positive))
{
fprintf(stderr, "hmmm cache did not forget an expired entry, i=%d\n", i);
exit(1);
}
}
dns_cache_free(cache);
}
void
test_dns_cache_benchmark(void)
{
GTimeVal start, end;
const gchar *hn;
gsize hn_len;
gboolean positive;
gint i;
DNSCacheOptions options =
{
.cache_size = 50000,
.expire = 600,
.expire_failed = 300,
.hosts = NULL
};
DNSCache *cache = dns_cache_new(&options);
for (i = 0; i < 10000; i++)
{
guint32 ni = htonl(i);
dns_cache_store_dynamic(cache, AF_INET, (void *) &ni, "hostname", TRUE);
}
g_get_current_time(&start);
/* run benchmarks */
for (i = 0; i < 10000; i++)
{
guint32 ni = htonl(i % 10000);
hn = NULL;
if (!dns_cache_lookup(cache, AF_INET, (void *) &ni, &hn, &hn_len, &positive))
{
fprintf(stderr, "hmm, dns cache entries expired during benchmarking, this is unexpected\n, i=%d", i);
}
}
g_get_current_time(&end);
printf("DNS cache speed: %12.3f iters/sec\n", i * 1e6 / g_time_val_diff(&end, &start));
dns_cache_free(cache);
}
int
main()
{
app_startup();
test_expiration();
test_dns_cache_benchmark();
app_shutdown();
return 0;
}
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