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/* Tests for the support_format_dns_packet function.
Copyright (C) 2016-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <support/check.h>
#include <support/format_nss.h>
#include <support/run_diff.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static void
check_packet (const void *buffer, size_t length,
const char *name, const char *expected)
{
char *actual = support_format_dns_packet (buffer, length);
if (strcmp (actual, expected) != 0)
{
support_record_failure ();
printf ("error: formatted packet does not match: %s\n", name);
support_run_diff ("expected", expected,
"actual", actual);
}
free (actual);
}
static void
test_aaaa_length (void)
{
static const char packet[] =
/* Header: Response with two records. */
"\x12\x34\x80\x00\x00\x01\x00\x02\x00\x00\x00\x00"
/* Question section. www.example/IN/AAAA. */
"\x03www\x07""example\x00\x00\x1c\x00\x01"
/* Answer section. www.example AAAA [corrupted]. */
"\xc0\x0c"
"\x00\x1c\x00\x01\x00\x00\x00\x00\x00\x10"
"\x20\x01\x0d\xb8\x05\x06\x07\x08"
"\x11\x12\x13\x14\x15\x16\x17\x18"
/* www.example AAAA [corrupted]. */
"\xc0\x0c"
"\x00\x1c\x00\x01\x00\x00\x00\x00\x00\x11"
"\x01\x02\x03\x04\x05\x06\x07\x08"
"\x11\x12\x13\x14\x15\x16\x17\x18" "\xff";
check_packet (packet, sizeof (packet) - 1, __func__,
"name: www.example\n"
"address: 2001:db8:506:708:1112:1314:1516:1718\n"
"error: AAAA record of size 17: www.example\n");
}
static void
test_multiple_cnames (void)
{
static const char packet[] =
/* Header: Response with three records. */
"\x12\x34\x80\x00\x00\x01\x00\x03\x00\x00\x00\x00"
/* Question section. www.example/IN/A. */
"\x03www\x07""example\x00\x00\x01\x00\x01"
/* Answer section. www.example CNAME www1.example. */
"\xc0\x0c"
"\x00\x05\x00\x01\x00\x00\x00\x00\x00\x07"
"\x04www1\xc0\x10"
/* www1 CNAME www2. */
"\x04www1\xc0\x10"
"\x00\x05\x00\x01\x00\x00\x00\x00\x00\x07"
"\x04www2\xc0\x10"
/* www2 A 192.0.2.1. */
"\x04www2\xc0\x10"
"\x00\x01\x00\x01\x00\x00\x00\x00\x00\x04"
"\xc0\x00\x02\x01";
check_packet (packet, sizeof (packet) - 1, __func__,
"name: www.example\n"
"name: www1.example\n"
"name: www2.example\n"
"address: 192.0.2.1\n");
}
static int
do_test (void)
{
test_aaaa_length ();
test_multiple_cnames ();
return 0;
}
#include <support/test-driver.c>
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