f889e73f60
Before this change, the loop iterating over RRs in the answer section stopped at the first CNAME record, never printing them. The CNAME and PTR record contents was extracted from the wrong buffer (whole packet instead RDATA). This desynced the parsing after the first CNAME or PTR record. Also fix the AAAA record parsing by checking their sizes.
98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
/* Tests for the support_format_dns_packet function.
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Copyright (C) 2016-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <support/check.h>
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#include <support/format_nss.h>
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#include <support/run_diff.h>
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static void
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check_packet (const void *buffer, size_t length,
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const char *name, const char *expected)
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{
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char *actual = support_format_dns_packet (buffer, length);
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if (strcmp (actual, expected) != 0)
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{
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support_record_failure ();
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printf ("error: formatted packet does not match: %s\n", name);
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support_run_diff ("expected", expected,
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"actual", actual);
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}
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free (actual);
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}
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static void
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test_aaaa_length (void)
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{
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static const char packet[] =
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/* Header: Response with two records. */
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"\x12\x34\x80\x00\x00\x01\x00\x02\x00\x00\x00\x00"
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/* Question section. www.example/IN/AAAA. */
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"\x03www\x07""example\x00\x00\x1c\x00\x01"
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/* Answer section. www.example AAAA [corrupted]. */
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"\xc0\x0c"
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"\x00\x1c\x00\x01\x00\x00\x00\x00\x00\x10"
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"\x20\x01\x0d\xb8\x05\x06\x07\x08"
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"\x11\x12\x13\x14\x15\x16\x17\x18"
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/* www.example AAAA [corrupted]. */
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"\xc0\x0c"
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"\x00\x1c\x00\x01\x00\x00\x00\x00\x00\x11"
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"\x01\x02\x03\x04\x05\x06\x07\x08"
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"\x11\x12\x13\x14\x15\x16\x17\x18" "\xff";
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check_packet (packet, sizeof (packet) - 1, __func__,
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"name: www.example\n"
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"address: 2001:db8:506:708:1112:1314:1516:1718\n"
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"error: AAAA record of size 17: www.example\n");
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}
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static void
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test_multiple_cnames (void)
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{
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static const char packet[] =
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/* Header: Response with three records. */
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"\x12\x34\x80\x00\x00\x01\x00\x03\x00\x00\x00\x00"
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/* Question section. www.example/IN/A. */
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"\x03www\x07""example\x00\x00\x01\x00\x01"
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/* Answer section. www.example CNAME www1.example. */
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"\xc0\x0c"
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"\x00\x05\x00\x01\x00\x00\x00\x00\x00\x07"
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"\x04www1\xc0\x10"
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/* www1 CNAME www2. */
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"\x04www1\xc0\x10"
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"\x00\x05\x00\x01\x00\x00\x00\x00\x00\x07"
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"\x04www2\xc0\x10"
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/* www2 A 192.0.2.1. */
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"\x04www2\xc0\x10"
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"\x00\x01\x00\x01\x00\x00\x00\x00\x00\x04"
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"\xc0\x00\x02\x01";
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check_packet (packet, sizeof (packet) - 1, __func__,
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"name: www.example\n"
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"name: www1.example\n"
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"name: www2.example\n"
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"address: 192.0.2.1\n");
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}
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static int
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do_test (void)
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{
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test_aaaa_length ();
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test_multiple_cnames ();
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return 0;
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}
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#include <support/test-driver.c>
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