a85b5759f3
These files were pulled from the 1.6.3 release tarball. This new version builds against OpenSSL version 1.1 which will be the default in the new Debian Stable which is due to be released RealSoonNow (tm).
544 lines
14 KiB
C
544 lines
14 KiB
C
/*
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* testcode/unitneg.c - unit test for negative cache routines.
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*
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* Copyright (c) 2008, NLnet Labs. All rights reserved.
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*
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* This software is open source.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the NLNET LABS nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/**
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* \file
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* Calls negative cache unit tests. Exits with code 1 on a failure.
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*/
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#include "config.h"
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#include "util/log.h"
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#include "util/net_help.h"
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#include "util/data/packed_rrset.h"
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#include "util/data/dname.h"
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#include "testcode/unitmain.h"
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#include "validator/val_neg.h"
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#include "sldns/rrdef.h"
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/** verbose unit test for negative cache */
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static int negverbose = 0;
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/** debug printout of neg cache */
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static void print_neg_cache(struct val_neg_cache* neg)
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{
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char buf[1024];
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struct val_neg_zone* z;
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struct val_neg_data* d;
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printf("neg_cache print\n");
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printf("memuse %d of %d\n", (int)neg->use, (int)neg->max);
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printf("maxiter %d\n", (int)neg->nsec3_max_iter);
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printf("%d zones\n", (int)neg->tree.count);
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RBTREE_FOR(z, struct val_neg_zone*, &neg->tree) {
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dname_str(z->name, buf);
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printf("%24s", buf);
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printf(" len=%2.2d labs=%d inuse=%d count=%d tree.count=%d\n",
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(int)z->len, z->labs, (int)z->in_use, z->count,
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(int)z->tree.count);
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}
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RBTREE_FOR(z, struct val_neg_zone*, &neg->tree) {
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printf("\n");
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dname_print(stdout, NULL, z->name);
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printf(" zone details\n");
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printf("len=%2.2d labs=%d inuse=%d count=%d tree.count=%d\n",
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(int)z->len, z->labs, (int)z->in_use, z->count,
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(int)z->tree.count);
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if(z->parent) {
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printf("parent=");
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dname_print(stdout, NULL, z->parent->name);
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printf("\n");
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} else {
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printf("parent=NULL\n");
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}
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RBTREE_FOR(d, struct val_neg_data*, &z->tree) {
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dname_str(d->name, buf);
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printf("%24s", buf);
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printf(" len=%2.2d labs=%d inuse=%d count=%d\n",
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(int)d->len, d->labs, (int)d->in_use, d->count);
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}
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}
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}
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/** get static pointer to random zone name */
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static char* get_random_zone(void)
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{
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static char zname[256];
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int labels = random() % 3;
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int i;
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char* p = zname;
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int labnum;
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for(i=0; i<labels; i++) {
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labnum = random()%10;
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snprintf(p, 256-(p-zname), "\003%3.3d", labnum);
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p+=4;
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}
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snprintf(p, 256-(p-zname), "\007example\003com");
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return zname;
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}
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/** get static pointer to random data names from and to */
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static void get_random_data(char** fromp, char** top, char* zname)
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{
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static char buf1[256], buf2[256];
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int type;
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int lab1, lab2;
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int labnum1[10], labnum2[10];
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int i;
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char* p;
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*fromp = buf1;
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*top = buf2;
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type = random()%10;
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if(type == 0) {
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/* ENT */
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lab1 = random() %3 + 1;
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lab2 = lab1 + random()%3 + 1;
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for(i=0; i<lab1; i++) {
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labnum1[i] = random()%100;
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labnum2[i] = labnum1[i];
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}
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for(i=lab1; i<lab2; i++) {
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labnum2[i] = random()%100;
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}
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} else if(type == 1) {
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/* end of zone */
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lab2 = 0;
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lab1 = random()%3 + 1;
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for(i=0; i<lab1; i++) {
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labnum1[i] = random()%100;
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}
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} else if(type == 2) {
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/* start of zone */
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lab1 = 0;
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lab2 = random()%3 + 1;
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for(i=0; i<lab2; i++) {
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labnum2[i] = random()%100;
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}
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} else {
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/* normal item */
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int common = random()%3;
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lab1 = random() %3 + 1;
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lab2 = random() %3 + 1;
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for(i=0; i<common; i++) {
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labnum1[i] = random()%100;
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labnum2[i] = labnum1[i];
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}
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labnum1[common] = random()%100;
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labnum2[common] = labnum1[common] + random()%20;
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for(i=common; i<lab1; i++)
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labnum1[i] = random()%100;
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for(i=common; i<lab2; i++)
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labnum2[i] = random()%100;
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}
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/* construct first */
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p = buf1;
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for(i=0; i<lab1; i++) {
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snprintf(p, 256-(p-buf1), "\003%3.3d", labnum1[i]);
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p+=4;
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}
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snprintf(p, 256-(p-buf1), "%s", zname);
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/* construct 2nd */
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p = buf2+2;
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for(i=0; i<lab2; i++) {
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snprintf(p, 256-(p-buf2)-3, "\003%3.3d", labnum2[i]);
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p+=4;
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}
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snprintf(p, 256-(p-buf2)-3, "%s", zname);
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buf2[0] = (char)(strlen(buf2+2)+1);
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buf2[1] = 0;
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if(negverbose) {
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log_nametypeclass(0, "add from", (uint8_t*)buf1, 0, 0);
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log_nametypeclass(0, "add to ", (uint8_t*)buf2+2, 0, 0);
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}
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}
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/** add a random item */
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static void add_item(struct val_neg_cache* neg)
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{
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struct val_neg_zone* z;
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struct packed_rrset_data rd;
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struct ub_packed_rrset_key nsec;
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size_t rr_len;
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time_t rr_ttl;
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uint8_t* rr_data;
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char* zname = get_random_zone();
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char* from, *to;
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lock_basic_lock(&neg->lock);
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if(negverbose)
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log_nametypeclass(0, "add to zone", (uint8_t*)zname, 0, 0);
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z = neg_find_zone(neg, (uint8_t*)zname, strlen(zname)+1,
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LDNS_RR_CLASS_IN);
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if(!z) {
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z = neg_create_zone(neg, (uint8_t*)zname, strlen(zname)+1,
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LDNS_RR_CLASS_IN);
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}
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unit_assert(z);
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val_neg_zone_take_inuse(z);
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/* construct random NSEC item */
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get_random_data(&from, &to, zname);
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/* create nsec and insert it */
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memset(&rd, 0, sizeof(rd));
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memset(&nsec, 0, sizeof(nsec));
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nsec.rk.dname = (uint8_t*)from;
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nsec.rk.dname_len = strlen(from)+1;
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nsec.rk.type = htons(LDNS_RR_TYPE_NSEC);
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nsec.rk.rrset_class = htons(LDNS_RR_CLASS_IN);
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nsec.entry.data = &rd;
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rd.security = sec_status_secure;
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rd.count = 1;
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rd.rr_len = &rr_len;
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rr_len = 19;
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rd.rr_ttl = &rr_ttl;
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rr_ttl = 0;
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rd.rr_data = &rr_data;
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rr_data = (uint8_t*)to;
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neg_insert_data(neg, z, &nsec);
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lock_basic_unlock(&neg->lock);
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}
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/** remove a random item */
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static void remove_item(struct val_neg_cache* neg)
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{
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int n, i;
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struct val_neg_data* d;
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rbnode_type* walk;
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struct val_neg_zone* z;
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lock_basic_lock(&neg->lock);
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if(neg->tree.count == 0) {
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lock_basic_unlock(&neg->lock);
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return; /* nothing to delete */
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}
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/* pick a random zone */
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walk = rbtree_first(&neg->tree); /* first highest parent, big count */
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z = (struct val_neg_zone*)walk;
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n = random() % (int)(z->count);
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if(negverbose)
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printf("neg stress delete zone %d\n", n);
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i=0;
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walk = rbtree_first(&neg->tree);
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z = (struct val_neg_zone*)walk;
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while(i!=n+1 && walk && walk != RBTREE_NULL && !z->in_use) {
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walk = rbtree_next(walk);
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z = (struct val_neg_zone*)walk;
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if(z->in_use)
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i++;
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}
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if(!walk || walk == RBTREE_NULL) {
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lock_basic_unlock(&neg->lock);
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return;
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}
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if(!z->in_use) {
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lock_basic_unlock(&neg->lock);
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return;
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}
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if(negverbose)
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log_nametypeclass(0, "delete zone", z->name, 0, 0);
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/* pick a random nsec item. - that is in use */
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walk = rbtree_first(&z->tree); /* first is highest parent */
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d = (struct val_neg_data*)walk;
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n = random() % (int)(d->count);
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if(negverbose)
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printf("neg stress delete item %d\n", n);
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i=0;
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walk = rbtree_first(&z->tree);
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d = (struct val_neg_data*)walk;
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while(i!=n+1 && walk && walk != RBTREE_NULL && !d->in_use) {
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walk = rbtree_next(walk);
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d = (struct val_neg_data*)walk;
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if(d->in_use)
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i++;
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}
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if(!walk || walk == RBTREE_NULL) {
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lock_basic_unlock(&neg->lock);
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return;
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}
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if(d->in_use) {
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if(negverbose)
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log_nametypeclass(0, "neg delete item:", d->name, 0, 0);
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neg_delete_data(neg, d);
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}
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lock_basic_unlock(&neg->lock);
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}
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/** sum up the zone trees */
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static size_t sumtrees_all(struct val_neg_cache* neg)
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{
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size_t res = 0;
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struct val_neg_zone* z;
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RBTREE_FOR(z, struct val_neg_zone*, &neg->tree) {
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res += z->tree.count;
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}
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return res;
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}
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/** sum up the zone trees, in_use only */
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static size_t sumtrees_inuse(struct val_neg_cache* neg)
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{
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size_t res = 0;
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struct val_neg_zone* z;
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struct val_neg_data* d;
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RBTREE_FOR(z, struct val_neg_zone*, &neg->tree) {
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/* get count of highest parent for num in use */
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d = (struct val_neg_data*)rbtree_first(&z->tree);
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if(d && (rbnode_type*)d!=RBTREE_NULL)
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res += d->count;
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}
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return res;
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}
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/** check if lru is still valid */
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static void check_lru(struct val_neg_cache* neg)
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{
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struct val_neg_data* p, *np;
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size_t num = 0;
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size_t inuse;
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p = neg->first;
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while(p) {
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if(!p->prev) {
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unit_assert(neg->first == p);
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}
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np = p->next;
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if(np) {
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unit_assert(np->prev == p);
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} else {
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unit_assert(neg->last == p);
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}
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num++;
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p = np;
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}
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inuse = sumtrees_inuse(neg);
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if(negverbose)
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printf("num lru %d, inuse %d, all %d\n",
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(int)num, (int)sumtrees_inuse(neg),
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(int)sumtrees_all(neg));
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unit_assert( num == inuse);
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unit_assert( inuse <= sumtrees_all(neg));
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}
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/** sum up number of items inuse in subtree */
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static int sum_subtree_inuse(struct val_neg_zone* zone,
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struct val_neg_data* data)
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{
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struct val_neg_data* d;
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int num = 0;
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RBTREE_FOR(d, struct val_neg_data*, &zone->tree) {
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if(dname_subdomain_c(d->name, data->name)) {
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if(d->in_use)
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num++;
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}
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}
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return num;
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}
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/** sum up number of items inuse in subtree */
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static int sum_zone_subtree_inuse(struct val_neg_cache* neg,
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struct val_neg_zone* zone)
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{
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struct val_neg_zone* z;
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int num = 0;
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RBTREE_FOR(z, struct val_neg_zone*, &neg->tree) {
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if(dname_subdomain_c(z->name, zone->name)) {
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if(z->in_use)
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num++;
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}
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}
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return num;
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}
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/** check point in data tree */
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static void check_data(struct val_neg_zone* zone, struct val_neg_data* data)
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{
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unit_assert(data->count > 0);
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if(data->parent) {
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unit_assert(data->parent->count >= data->count);
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if(data->parent->in_use) {
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unit_assert(data->parent->count > data->count);
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}
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unit_assert(data->parent->labs == data->labs-1);
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/* and parent must be one label shorter */
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unit_assert(data->name[0] == (data->len-data->parent->len-1));
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unit_assert(query_dname_compare(data->name + data->name[0]+1,
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data->parent->name) == 0);
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} else {
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/* must be apex */
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unit_assert(dname_is_root(data->name));
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}
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/* tree property: */
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unit_assert(data->count == sum_subtree_inuse(zone, data));
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}
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/** check if tree of data in zone is valid */
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static void checkzonetree(struct val_neg_zone* zone)
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{
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struct val_neg_data* d;
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/* check all data in tree */
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RBTREE_FOR(d, struct val_neg_data*, &zone->tree) {
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check_data(zone, d);
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}
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}
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/** check if negative cache is still valid */
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static void check_zone_invariants(struct val_neg_cache* neg,
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struct val_neg_zone* zone)
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{
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unit_assert(zone->nsec3_hash == 0);
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unit_assert(zone->tree.cmp == &val_neg_data_compare);
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unit_assert(zone->count != 0);
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if(zone->tree.count == 0)
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unit_assert(!zone->in_use);
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else {
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if(!zone->in_use) {
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/* details on error */
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log_nametypeclass(0, "zone", zone->name, 0, 0);
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log_err("inuse %d count=%d tree.count=%d",
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zone->in_use, zone->count,
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(int)zone->tree.count);
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if(negverbose)
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print_neg_cache(neg);
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}
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unit_assert(zone->in_use);
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}
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if(zone->parent) {
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unit_assert(zone->parent->count >= zone->count);
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if(zone->parent->in_use) {
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unit_assert(zone->parent->count > zone->count);
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}
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unit_assert(zone->parent->labs == zone->labs-1);
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/* and parent must be one label shorter */
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unit_assert(zone->name[0] == (zone->len-zone->parent->len-1));
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unit_assert(query_dname_compare(zone->name + zone->name[0]+1,
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zone->parent->name) == 0);
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} else {
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/* must be apex */
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unit_assert(dname_is_root(zone->name));
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}
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/* tree property: */
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unit_assert(zone->count == sum_zone_subtree_inuse(neg, zone));
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/* check structure of zone data tree */
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checkzonetree(zone);
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}
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/** check if negative cache is still valid */
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static void check_neg_invariants(struct val_neg_cache* neg)
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{
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struct val_neg_zone* z;
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/* check structure of LRU list */
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lock_basic_lock(&neg->lock);
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check_lru(neg);
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unit_assert(neg->max == 1024*1024);
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unit_assert(neg->nsec3_max_iter == 1500);
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unit_assert(neg->tree.cmp == &val_neg_zone_compare);
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if(neg->tree.count == 0) {
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/* empty */
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unit_assert(neg->tree.count == 0);
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unit_assert(neg->first == NULL);
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unit_assert(neg->last == NULL);
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unit_assert(neg->use == 0);
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lock_basic_unlock(&neg->lock);
|
|
return;
|
|
}
|
|
|
|
unit_assert(neg->first != NULL);
|
|
unit_assert(neg->last != NULL);
|
|
|
|
RBTREE_FOR(z, struct val_neg_zone*, &neg->tree) {
|
|
check_zone_invariants(neg, z);
|
|
}
|
|
lock_basic_unlock(&neg->lock);
|
|
}
|
|
|
|
/** perform stress test on insert and delete in neg cache */
|
|
static void stress_test(struct val_neg_cache* neg)
|
|
{
|
|
int i;
|
|
if(negverbose)
|
|
printf("negcache test\n");
|
|
for(i=0; i<100; i++) {
|
|
if(random() % 10 < 8)
|
|
add_item(neg);
|
|
else remove_item(neg);
|
|
check_neg_invariants(neg);
|
|
}
|
|
/* empty it */
|
|
if(negverbose)
|
|
printf("neg stress empty\n");
|
|
while(neg->first) {
|
|
remove_item(neg);
|
|
check_neg_invariants(neg);
|
|
}
|
|
if(negverbose)
|
|
printf("neg stress emptied\n");
|
|
unit_assert(neg->first == NULL);
|
|
/* insert again */
|
|
for(i=0; i<100; i++) {
|
|
if(random() % 10 < 8)
|
|
add_item(neg);
|
|
else remove_item(neg);
|
|
check_neg_invariants(neg);
|
|
}
|
|
}
|
|
|
|
void neg_test(void)
|
|
{
|
|
struct val_neg_cache* neg;
|
|
srandom(48);
|
|
unit_show_feature("negative cache");
|
|
|
|
/* create with defaults */
|
|
neg = val_neg_create(NULL, 1500);
|
|
unit_assert(neg);
|
|
|
|
stress_test(neg);
|
|
|
|
neg_cache_delete(neg);
|
|
}
|