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https://gitlab.isc.org/isc-projects/bind9
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2edefbad4a
this parameter was added as a (minor) optimization for cases where dns_name_towire() is run repeatedly with the same compression context, as when rendering all of the rdatas in an rdataset. it is currently only used in one place. we now simplify the interface by removing the extra parameter. the compression offset value is now part of the compression context, and can be activated when needed by calling dns_compress_setmultiuse(). multiuse mode is automatically deactivated by any subsequent call to dns_compress_permitted().
107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* SPDX-License-Identifier: MPL-2.0
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, you can obtain one at https://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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#include <err.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <isc/buffer.h>
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#include <isc/lib.h>
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#include <isc/mem.h>
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#include <isc/result.h>
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#include <isc/time.h>
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#include <isc/util.h>
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#include <dns/compress.h>
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#include <dns/fixedname.h>
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#include <dns/lib.h>
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#include <dns/name.h>
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static void
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CHECKRESULT(isc_result_t result, const char *msg) {
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if (result != ISC_R_SUCCESS) {
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printf("%s: %s\n", msg, isc_result_totext(result));
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exit(EXIT_FAILURE);
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}
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}
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int
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main(void) {
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isc_result_t result;
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isc_buffer_t buf;
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isc_mem_t *mctx = NULL;
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isc_mem_create(&mctx);
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static dns_fixedname_t fixedname[65536];
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unsigned int count = 0;
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char *line = NULL;
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size_t linecap = 0;
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ssize_t linelen;
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while ((linelen = getline(&line, &linecap, stdin)) > 0) {
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if (line[linelen - 1] == '\n') {
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line[--linelen] = '\0';
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}
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isc_buffer_init(&buf, line, linelen);
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isc_buffer_add(&buf, linelen);
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if (count == ARRAY_SIZE(fixedname)) {
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errx(1, "too many names");
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}
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dns_name_t *name = dns_fixedname_initname(&fixedname[count++]);
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result = dns_name_fromtext(name, &buf, dns_rootname, 0, NULL);
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CHECKRESULT(result, line);
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}
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unsigned int repeat = 100;
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isc_time_t start;
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start = isc_time_now_hires();
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for (unsigned int n = 0; n < repeat; n++) {
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static uint8_t wire[4 * 1024];
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dns_compress_t cctx;
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isc_buffer_init(&buf, wire, sizeof(wire));
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dns_compress_init(&cctx, mctx, 0);
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for (unsigned int i = 0; i < count; i++) {
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dns_name_t *name = dns_fixedname_name(&fixedname[i]);
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result = dns_name_towire(name, &cctx, &buf);
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if (result == ISC_R_NOSPACE) {
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dns_compress_invalidate(&cctx);
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dns_compress_init(&cctx, mctx, 0);
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isc_buffer_init(&buf, wire, sizeof(wire));
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} else {
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CHECKRESULT(result, "dns_name_towire");
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}
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}
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dns_compress_invalidate(&cctx);
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}
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isc_time_t finish;
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finish = isc_time_now_hires();
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uint64_t microseconds = isc_time_microdiff(&finish, &start);
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printf("time %f / %u\n", (double)microseconds / 1000000.0, repeat);
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printf("names %u\n", count);
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isc_mem_destroy(&mctx);
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return 0;
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}
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