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2cb5a6210f334374c601f408c6e7c7ec75ee0949
bind9/tests/dns/dnstap_test.c
Ondřej Surý 2cb5a6210f Improve the badcache cleaning by adding LRU and using RCU 
Instead of cleaning the dns_badcache opportunistically, add per-loop
LRU, so each thread-loop can clean the expired entries.  This also
allows removal of the atomic operations as the badcache entries are now
immutable, instead of updating the badcache entry in place, the old
entry is now deleted from the hashtable and the LRU list, and the new
entry is inserted in the LRU.
2024-11-27 17:44:53 +01:00

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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#include <inttypes.h>
#include <sched.h> /* IWYU pragma: keep */
#include <setjmp.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define UNIT_TESTING
#include <cmocka.h>
#include <fstrm.h>
#include <protobuf-c/protobuf-c.h>
#include <isc/buffer.h>
#include <isc/file.h>
#include <isc/stdio.h>
#include <isc/types.h>
#include <isc/util.h>
#include <dns/dnstap.h>
#include <dns/view.h>
#include <tests/dns.h>
#define TAPFILE TESTS_DIR "/testdata/dnstap/dnstap.file"
#define TAPSOCK TESTS_DIR "/testdata/dnstap/dnstap.sock"
#define TAPSAVED TESTS_DIR "/testdata/dnstap/dnstap.saved"
#define TAPTEXT TESTS_DIR "/testdata/dnstap/dnstap.text"
static void
cleanup(void **state ISC_ATTR_UNUSED) {
(void)isc_file_remove(TAPFILE);
(void)isc_file_remove(TAPSOCK);
}
static int
setup(void **state) {
/*
* Make sure files are cleaned up before the test runs.
*/
cleanup(state);
/*
* Make sure text conversions match the time zone in which
* the testdata was originally generated.
*/
setenv("TZ", "PDT8", 1);
setup_loopmgr(state);
return 0;
}
static int
teardown(void **state) {
cleanup(state);
teardown_loopmgr(state);
return 0;
}
/* set up dnstap environment */
ISC_LOOP_TEST_IMPL(dns_dt_create) {
isc_result_t result;
dns_dtenv_t *dtenv = NULL;
struct fstrm_iothr_options *fopt;
fopt = fstrm_iothr_options_init();
assert_non_null(fopt);
fstrm_iothr_options_set_num_input_queues(fopt, 1);
result = dns_dt_create(mctx, dns_dtmode_file, TAPFILE, &fopt, NULL,
&dtenv);
assert_int_equal(result, ISC_R_SUCCESS);
if (dtenv != NULL) {
dns_dt_detach(&dtenv);
}
if (fopt != NULL) {
fstrm_iothr_options_destroy(&fopt);
}
assert_true(isc_file_exists(TAPFILE));
fopt = fstrm_iothr_options_init();
assert_non_null(fopt);
fstrm_iothr_options_set_num_input_queues(fopt, 1);
result = dns_dt_create(mctx, dns_dtmode_unix, TAPSOCK, &fopt, NULL,
&dtenv);
assert_int_equal(result, ISC_R_SUCCESS);
if (dtenv != NULL) {
dns_dt_detach(&dtenv);
}
if (fopt != NULL) {
fstrm_iothr_options_destroy(&fopt);
}
/* 'create' should succeed, but the file shouldn't exist yet */
assert_false(isc_file_exists(TAPSOCK));
fopt = fstrm_iothr_options_init();
assert_non_null(fopt);
fstrm_iothr_options_set_num_input_queues(fopt, 1);
result = dns_dt_create(mctx, 33, TAPSOCK, &fopt, NULL, &dtenv);
assert_int_equal(result, ISC_R_FAILURE);
assert_null(dtenv);
if (dtenv != NULL) {
dns_dt_detach(&dtenv);
}
if (fopt != NULL) {
fstrm_iothr_options_destroy(&fopt);
}
isc_loopmgr_shutdown(loopmgr);
}
/* send dnstap messages */
ISC_LOOP_TEST_IMPL(dns_dt_send) {
isc_result_t result;
dns_dtenv_t *dtenv = NULL;
dns_dthandle_t *handle = NULL;
uint8_t *data;
size_t dsize;
unsigned char zone[DNS_NAME_MAXWIRE];
unsigned char qambuffer[4096], rambuffer[4096];
unsigned char qrmbuffer[4096], rrmbuffer[4096];
isc_buffer_t zb, qamsg, ramsg, qrmsg, rrmsg;
size_t qasize, qrsize, rasize, rrsize;
dns_fixedname_t zfname;
dns_name_t *zname;
dns_dtmsgtype_t dt;
dns_view_t *view = NULL;
dns_compress_t cctx;
isc_region_t zr;
isc_sockaddr_t qaddr;
isc_sockaddr_t raddr;
struct in_addr in;
isc_stdtime_t now = isc_stdtime_now();
isc_time_t p, f;
struct fstrm_iothr_options *fopt;
result = dns_test_makeview("test", false, false, &view);
assert_int_equal(result, ISC_R_SUCCESS);
fopt = fstrm_iothr_options_init();
assert_non_null(fopt);
fstrm_iothr_options_set_num_input_queues(fopt, 1);
result = dns_dt_create(mctx, dns_dtmode_file, TAPFILE, &fopt, NULL,
&dtenv);
assert_int_equal(result, ISC_R_SUCCESS);
dns_dt_attach(dtenv, &view->dtenv);
view->dttypes = DNS_DTTYPE_ALL;
/*
* Set up some test data
*/
zname = dns_fixedname_initname(&zfname);
isc_buffer_constinit(&zb, "example.com.", 12);
isc_buffer_add(&zb, 12);
result = dns_name_fromtext(zname, &zb, NULL, 0, NULL);
assert_int_equal(result, ISC_R_SUCCESS);
memset(&zr, 0, sizeof(zr));
isc_buffer_init(&zb, zone, sizeof(zone));
dns_compress_init(&cctx, mctx, 0);
dns_compress_setpermitted(&cctx, false);
result = dns_name_towire(zname, &cctx, &zb, NULL);
assert_int_equal(result, ISC_R_SUCCESS);
dns_compress_invalidate(&cctx);
isc_buffer_usedregion(&zb, &zr);
in.s_addr = inet_addr("10.53.0.1");
isc_sockaddr_fromin(&qaddr, &in, 2112);
in.s_addr = inet_addr("10.53.0.2");
isc_sockaddr_fromin(&raddr, &in, 2112);
isc_time_set(&p, now - 3600, 0); /* past */
isc_time_set(&f, now + 3600, 0); /* future */
result = dns_test_getdata(TESTS_DIR "/testdata/dnstap/query.auth",
qambuffer, sizeof(qambuffer), &qasize);
assert_int_equal(result, ISC_R_SUCCESS);
isc_buffer_init(&qamsg, qambuffer, qasize);
isc_buffer_add(&qamsg, qasize);
result = dns_test_getdata(TESTS_DIR "/testdata/dnstap/response.auth",
rambuffer, sizeof(rambuffer), &rasize);
assert_int_equal(result, ISC_R_SUCCESS);
isc_buffer_init(&ramsg, rambuffer, rasize);
isc_buffer_add(&ramsg, rasize);
result = dns_test_getdata(TESTS_DIR "/testdata/dnstap/query.recursive",
qrmbuffer, sizeof(qrmbuffer), &qrsize);
assert_int_equal(result, ISC_R_SUCCESS);
isc_buffer_init(&qrmsg, qrmbuffer, qrsize);
isc_buffer_add(&qrmsg, qrsize);
result = dns_test_getdata(TESTS_DIR
"/testdata/dnstap/response.recursive",
rrmbuffer, sizeof(rrmbuffer), &rrsize);
assert_int_equal(result, ISC_R_SUCCESS);
isc_buffer_init(&rrmsg, rrmbuffer, rrsize);
isc_buffer_add(&rrmsg, rrsize);
for (dt = DNS_DTTYPE_SQ; dt <= DNS_DTTYPE_TR; dt <<= 1) {
isc_buffer_t *m;
isc_sockaddr_t *q = &qaddr, *r = &raddr;
switch (dt) {
case DNS_DTTYPE_AQ:
m = &qamsg;
break;
case DNS_DTTYPE_AR:
m = &ramsg;
break;
default:
m = &qrmsg;
if ((dt & DNS_DTTYPE_RESPONSE) != 0) {
m = &ramsg;
}
break;
}
dns_dt_send(view, dt, q, r, DNS_TRANSPORT_UDP, &zr, &p, &f, m);
dns_dt_send(view, dt, q, r, DNS_TRANSPORT_UDP, &zr, NULL, &f,
m);
dns_dt_send(view, dt, q, r, DNS_TRANSPORT_UDP, &zr, &p, NULL,
m);
dns_dt_send(view, dt, q, r, DNS_TRANSPORT_UDP, &zr, NULL, NULL,
m);
dns_dt_send(view, dt, q, r, DNS_TRANSPORT_TCP, &zr, &p, &f, m);
dns_dt_send(view, dt, q, r, DNS_TRANSPORT_TCP, &zr, NULL, &f,
m);
dns_dt_send(view, dt, q, r, DNS_TRANSPORT_TCP, &zr, &p, NULL,
m);
dns_dt_send(view, dt, q, r, DNS_TRANSPORT_TCP, &zr, NULL, NULL,
m);
}
dns_dt_detach(&view->dtenv);
dns_dt_detach(&dtenv);
dns_view_detach(&view);
result = dns_dt_open(TAPFILE, dns_dtmode_file, mctx, &handle);
assert_int_equal(result, ISC_R_SUCCESS);
while (dns_dt_getframe(handle, &data, &dsize) == ISC_R_SUCCESS) {
dns_dtdata_t *dtdata = NULL;
isc_region_t r;
static dns_dtmsgtype_t expected = DNS_DTTYPE_SQ;
static int n = 0;
r.base = data;
r.length = dsize;
result = dns_dt_parse(mctx, &r, &dtdata);
assert_int_equal(result, ISC_R_SUCCESS);
if (result != ISC_R_SUCCESS) {
n++;
continue;
}
assert_int_equal(dtdata->type, expected);
if (++n % 8 == 0) {
expected <<= 1;
}
dns_dtdata_free(&dtdata);
}
if (fopt != NULL) {
fstrm_iothr_options_destroy(&fopt);
}
if (handle != NULL) {
dns_dt_close(&handle);
}
isc_loopmgr_shutdown(loopmgr);
}
/* dnstap message to text */
ISC_LOOP_TEST_IMPL(dns_dt_totext) {
isc_result_t result;
dns_dthandle_t *handle = NULL;
uint8_t *data;
size_t dsize;
FILE *fp = NULL;
result = dns_dt_open(TAPSAVED, dns_dtmode_file, mctx, &handle);
assert_int_equal(result, ISC_R_SUCCESS);
result = isc_stdio_open(TAPTEXT, "r", &fp);
assert_int_equal(result, ISC_R_SUCCESS);
while (dns_dt_getframe(handle, &data, &dsize) == ISC_R_SUCCESS) {
dns_dtdata_t *dtdata = NULL;
isc_buffer_t *b = NULL;
isc_region_t r;
char s[BUFSIZ], *p;
r.base = data;
r.length = dsize;
/* read the corresponding line of text */
p = fgets(s, sizeof(s), fp);
assert_ptr_equal(p, s);
if (p == NULL) {
break;
}
p = strchr(p, '\n');
if (p != NULL) {
*p = '\0';
}
/* parse dnstap frame */
result = dns_dt_parse(mctx, &r, &dtdata);
assert_int_equal(result, ISC_R_SUCCESS);
if (result != ISC_R_SUCCESS) {
continue;
}
isc_buffer_allocate(mctx, &b, 2048);
assert_non_null(b);
if (b == NULL) {
break;
}
/* convert to text and compare */
result = dns_dt_datatotext(dtdata, &b);
assert_int_equal(result, ISC_R_SUCCESS);
assert_string_equal((char *)isc_buffer_base(b), s);
dns_dtdata_free(&dtdata);
isc_buffer_free(&b);
}
if (handle != NULL) {
dns_dt_close(&handle);
}
isc_loopmgr_shutdown(loopmgr);
}
ISC_TEST_LIST_START
ISC_TEST_ENTRY_CUSTOM(dns_dt_create, setup, teardown)
ISC_TEST_ENTRY_CUSTOM(dns_dt_send, setup, teardown)
ISC_TEST_ENTRY_CUSTOM(dns_dt_totext, setup, teardown)
ISC_TEST_LIST_END
ISC_TEST_MAIN
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