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/*
* testcode/unitinfra.c - unit test for infra cache.
*
* Copyright (c) 2025, NLnet Labs. All rights reserved.
*
* This software is open source.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the NLNET LABS nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/**
* \file
* Tests the infra functionality.
*/
#include "config.h"
#include "testcode/unitmain.h"
#include "iterator/iterator.h"
#include "services/cache/infra.h"
#include "util/config_file.h"
#include "util/net_help.h"
/* lookup and get key and data structs easily */
static struct infra_data* infra_lookup_host(struct infra_cache* infra,
struct sockaddr_storage* addr, socklen_t addrlen, uint8_t* zone,
size_t zonelen, int wr, time_t now, struct infra_key** k)
{
struct infra_data* d;
struct lruhash_entry* e = infra_lookup_nottl(infra, addr, addrlen,
zone, zonelen, wr);
if(!e) return NULL;
d = (struct infra_data*)e->data;
if(d->ttl < now) {
lock_rw_unlock(&e->lock);
return NULL;
}
*k = (struct infra_key*)e->key;
return d;
}
static void test_keep_probing(struct infra_cache* slab,
struct config_file* cfg, struct sockaddr_storage one, socklen_t onelen,
uint8_t* zone, size_t zonelen, time_t *now, int keep_probing,
int rtt_max_timeout)
{
uint8_t edns_lame;
int vs, to, lame, dnsseclame, reclame, probedelay;
struct infra_key* k;
struct infra_data* d;
/* configure */
cfg->infra_cache_max_rtt = rtt_max_timeout;
config_apply_max_rtt(rtt_max_timeout);
slab->infra_keep_probing = keep_probing;
/* expired previous entry */
*now += cfg->host_ttl + 10;
unit_assert( infra_host(slab, &one, onelen, zone, zonelen,
*now, &vs, &edns_lame, &to) );
/* simulate timeouts until the USEFUL_SERVER_TOP_TIMEOUT is reached */
while(to < USEFUL_SERVER_TOP_TIMEOUT) {
unit_assert( infra_rtt_update(slab, &one, onelen, zone, zonelen,
LDNS_RR_TYPE_A, -1, to, *now) );
unit_assert( infra_host(slab, &one, onelen, zone, zonelen,
*now, &vs, &edns_lame, &to) );
unit_assert( vs == 0 && to <= USEFUL_SERVER_TOP_TIMEOUT && edns_lame == 0 );
}
unit_assert( vs == 0 && to == USEFUL_SERVER_TOP_TIMEOUT && edns_lame == 0 );
/* don't let the record expire */
unit_assert( (d=infra_lookup_host(slab, &one, onelen, zone, zonelen, 0, *now, &k)) );
unit_assert( d->timeout_A >= TIMEOUT_COUNT_MAX );
unit_assert( d->probedelay > 0 );
probedelay = d->probedelay;
lock_rw_unlock(&k->entry.lock);
cfg->host_ttl = cfg->host_ttl + *now < probedelay
?cfg->host_ttl :probedelay + 10;
/* advance time and check that probing is as expected; we already had a
* lot of A timeouts (checked above). */
*now = probedelay;
unit_assert( infra_get_lame_rtt(slab, &one, onelen, zone, zonelen,
LDNS_RR_TYPE_A, &lame, &dnsseclame, &reclame, &to, *now) );
unit_assert( lame == 0 && dnsseclame == 0 && reclame == 0
&& to == keep_probing ?still_useful_timeout() :USEFUL_SERVER_TOP_TIMEOUT);
}
/** test host cache */
void infra_test(void)
{
struct sockaddr_storage one;
socklen_t onelen;
uint8_t* zone = (uint8_t*)"\007example\003com\000";
size_t zonelen = 13;
struct infra_cache* slab;
struct config_file* cfg = config_create();
time_t now = 0;
uint8_t edns_lame;
int vs, to;
struct infra_key* k;
struct infra_data* d;
int init = UNKNOWN_SERVER_NICENESS;
int default_max_rtt = USEFUL_SERVER_TOP_TIMEOUT;
unit_show_feature("infra cache");
unit_assert(ipstrtoaddr("127.0.0.1", 53, &one, &onelen));
config_auto_slab_values(cfg);
slab = infra_create(cfg);
/* insert new record */
unit_assert( infra_host(slab, &one, onelen, zone, zonelen, now,
&vs, &edns_lame, &to) );
unit_assert( vs == 0 && to == init && edns_lame == 0 );
/* simulate no answer */
unit_assert( infra_rtt_update(slab, &one, onelen, zone, zonelen, LDNS_RR_TYPE_A, -1, init, now) );
unit_assert( infra_host(slab, &one, onelen, zone, zonelen,
now, &vs, &edns_lame, &to) );
unit_assert( vs == 0 && to == init*2 && edns_lame == 0 );
/* simulate EDNS lame */
unit_assert( infra_edns_update(slab, &one, onelen, zone, zonelen, -1, now) );
unit_assert( infra_host(slab, &one, onelen, zone, zonelen,
now, &vs, &edns_lame, &to) );
unit_assert( vs == -1 && to == init*2 && edns_lame == 1);
/* simulate cache expiry */
now += cfg->host_ttl + 10;
unit_assert( infra_host(slab, &one, onelen, zone, zonelen,
now, &vs, &edns_lame, &to) );
unit_assert( vs == 0 && to == init && edns_lame == 0 );
/* simulate no lame answer */
unit_assert( infra_set_lame(slab, &one, onelen,
zone, zonelen, now, 0, 0, LDNS_RR_TYPE_A) );
unit_assert( (d=infra_lookup_host(slab, &one, onelen, zone, zonelen, 0, now, &k)) );
unit_assert( d->ttl == now+cfg->host_ttl );
unit_assert( d->edns_version == 0 );
unit_assert(!d->isdnsseclame && !d->rec_lame && d->lame_type_A &&
!d->lame_other);
lock_rw_unlock(&k->entry.lock);
/* test merge of data */
unit_assert( infra_set_lame(slab, &one, onelen,
zone, zonelen, now, 0, 0, LDNS_RR_TYPE_AAAA) );
unit_assert( (d=infra_lookup_host(slab, &one, onelen, zone, zonelen, 0, now, &k)) );
unit_assert(!d->isdnsseclame && !d->rec_lame && d->lame_type_A &&
d->lame_other);
lock_rw_unlock(&k->entry.lock);
/* test that noEDNS cannot overwrite known-yesEDNS */
now += cfg->host_ttl + 10;
unit_assert( infra_host(slab, &one, onelen, zone, zonelen,
now, &vs, &edns_lame, &to) );
unit_assert( vs == 0 && to == init && edns_lame == 0 );
unit_assert( infra_edns_update(slab, &one, onelen, zone, zonelen, 0, now) );
unit_assert( infra_host(slab, &one, onelen, zone, zonelen,
now, &vs, &edns_lame, &to) );
unit_assert( vs == 0 && to == init && edns_lame == 1 );
unit_assert( infra_edns_update(slab, &one, onelen, zone, zonelen, -1, now) );
unit_assert( infra_host(slab, &one, onelen, zone, zonelen,
now, &vs, &edns_lame, &to) );
unit_assert( vs == 0 && to == init && edns_lame == 1 );
unit_show_feature("infra cache probing (keep-probing off, default infra-cache-max-rtt)");
test_keep_probing(slab, cfg, one, onelen, zone, zonelen, &now, 0, default_max_rtt);
unit_show_feature("infra cache probing (keep-probing on, default infra-cache-max-rtt)");
test_keep_probing(slab, cfg, one, onelen, zone, zonelen, &now, 1, default_max_rtt);
unit_show_feature("infra cache probing (keep-probing off, low infra-cache-max-rtt)");
test_keep_probing(slab, cfg, one, onelen, zone, zonelen, &now, 0, 3000);
unit_show_feature("infra cache probing (keep-probing on, low infra-cache-max-rtt)");
test_keep_probing(slab, cfg, one, onelen, zone, zonelen, &now, 1, 3000);
/* Re-apply defaults for other unit tests that follow */
config_apply_max_rtt(default_max_rtt);
infra_delete(slab);
config_delete(cfg);
}
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