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/* Tests for res_hnok and related functions.
Copyright (C) 2017-2024 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 <array_length.h>
#include <resolv.h>
#include <string.h>
#include <support/check.h>
#include <support/test-driver.h>
/* Bits which indicate which functions are supposed to report
success. */
enum
{
hnok = 1,
dnok = 2,
mailok = 4,
ownok = 8,
allnomailok = hnok | dnok | ownok,
allok = hnok | dnok | mailok | ownok
};
/* A string of 60 characters. */
#define STRING60 "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"
/* A string of 63 characters (maximum label length). */
#define STRING63 STRING60 "zzz"
/* Combines a test name with the expected results. */
struct test_case
{
const char *dn;
unsigned int result; /* Combination of the *ok flags. */
};
static const struct test_case tests[] =
{
{ "", allok },
{ ".", allok },
{ "..", 0 },
{ "www", allnomailok },
{ "www.", allnomailok },
{ "example", allnomailok },
{ "example.com", allok },
{ "www.example.com", allok },
{ "www.example.com.", allok },
{ "www-.example.com.", allok },
{ "www.-example.com.", allok },
{ "*.example.com", dnok | mailok | ownok },
{ "-v", dnok },
{ "-v.example.com", mailok | dnok },
{ "**.example.com", dnok | mailok },
{ "www.example.com\\", 0 },
{ STRING63, allnomailok },
{ STRING63 ".", allnomailok },
{ STRING63 "\\.", 0 },
{ STRING63 "z", 0 },
{ STRING63 ".example.com", allok },
{ STRING63 "." STRING63 "." STRING63 "." STRING60 "z", allok },
{ STRING63 "." STRING63 "." STRING63 "." STRING60 "z.", allok },
{ STRING63 "." STRING63 "." STRING63 "." STRING60 "zz", 0 },
{ STRING63 "." STRING63 "." STRING63 "." STRING60 "zzz", 0 },
{ "hostmaster@mail.example.com", dnok | mailok },
{ "hostmaster\\@mail.example.com", dnok | mailok },
{ "with whitespace", 0 },
{ "with\twhitespace", 0 },
{ "with\nwhitespace", 0 },
{ "with.whitespace ", 0 },
{ "with.whitespace\t", 0 },
{ "with.whitespace\n", 0 },
{ "with\\ whitespace", 0 },
{ "with\\\twhitespace", 0 },
{ "with\\\nwhitespace", 0 },
{ "with.whitespace\\ ", 0 },
{ "with.whitespace\\\t", 0 },
{ "with.whitespace\\\n", 0 },
};
/* Run test case *TEST with FUNC (named FUNCNAME) and report an error
if the result does not match the result flag at BIT. */
static void
one_test (const struct test_case *test, const char *funcname,
int (*func) (const char *), unsigned int bit)
{
int expected = (test->result & bit) != 0;
int actual = func (test->dn);
if (actual != expected)
{
support_record_failure ();
printf ("error: %s (\"%s\"): expected=%d, actual=%d\n",
funcname, test->dn, expected, actual);
}
}
/* Run 255 tests using all the bytes from 1 to 255, surround the byte
with the strings PREFIX and SUFFIX, and check that FUNC (named
FUNCNAME) accepts only those bytes listed in ACCEPTED. */
static void
one_char (const char *prefix, const char *accepted, const char *suffix,
const char *funcname, int (*func) (const char *))
{
for (int ch = 1; ch <= 255; ++ch)
{
char dn[1024];
snprintf (dn, sizeof (dn), "%s%c%s", prefix, ch, suffix);
int expected = strchr (accepted, ch) != NULL;
int actual = func (dn);
if (actual != expected)
{
support_record_failure ();
printf ("error: %s (\"%s\"): expected=%d, actual=%d\n",
funcname, dn, expected, actual);
}
}
}
#define LETTERSDIGITS \
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
#define PRINTABLE \
"!\"#$%&'()*+,/:;<=>?@[\\]^`{|}~"
static int
do_test (void)
{
for (const struct test_case *test = tests; test < array_end (tests); ++test)
{
if (test_verbose)
printf ("info: testing domain name [[[%s]]] (0x%x)\n",
test->dn, test->result);
one_test (test, "res_hnok", res_hnok, hnok);
one_test (test, "res_dnok", res_dnok, dnok);
one_test (test, "res_mailok", res_mailok, mailok);
one_test (test, "res_ownok", res_ownok, ownok);
}
one_char
("", LETTERSDIGITS "._", "", "res_hnok", res_hnok);
one_char
("middle",
LETTERSDIGITS ".-_\\", /* "middle\\suffix" == "middlesuffix", so good. */
"suffix", "res_hnok", res_hnok);
one_char
("middle",
LETTERSDIGITS ".-_" PRINTABLE,
"suffix.example", "res_mailok", res_mailok);
one_char
("mailbox.middle",
LETTERSDIGITS ".-_\\",
"suffix.example", "res_mailok", res_mailok);
return 0;
}
#include <support/test-driver.c>
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