resolv/tst-res_hnok.c

   1 /* Tests for res_hnok and related functions.
   2    Copyright (C) 2017-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <array_length.h>
  20 #include <resolv.h>
  21 #include <string.h>
  22 #include <support/check.h>
  23 #include <support/test-driver.h>
  24
  25 /* Bits which indicate which functions are supposed to report
  26    success.  */
  27 enum
  28   {
  29     hnok = 1,
  30     dnok = 2,
  31     mailok = 4,
  32     ownok = 8,
  33     allnomailok = hnok | dnok | ownok,
  34     allok = hnok | dnok | mailok | ownok
  35   };
  36
  37 /* A string of 60 characters.  */
  38 #define STRING60 "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"
  39
  40 /* A string of 63 characters (maximum label length).  */
  41 #define STRING63 STRING60 "zzz"
  42
  43 /* Combines a test name with the expected results.  */
  44 struct test_case
  45 {
  46   const char *dn;
  47   unsigned int result;          /* Combination of the *ok flags.  */
  48 };
  49
  50 static const struct test_case tests[] =
  51   {
  52     { "", allok },
  53     { ".", allok },
  54     { "..", 0 },
  55     { "www", allnomailok },
  56     { "www.", allnomailok },
  57     { "example", allnomailok },
  58     { "example.com", allok },
  59     { "www.example.com", allok },
  60     { "www.example.com.", allok },
  61     { "www-.example.com.", allok },
  62     { "www.-example.com.", allok },
  63     { "*.example.com", dnok | mailok | ownok },
  64     { "-v", dnok },
  65     { "-v.example.com", mailok | dnok },
  66     { "**.example.com", dnok | mailok },
  67     { "www.example.com\\", 0 },
  68     { STRING63, allnomailok },
  69     { STRING63 ".", allnomailok },
  70     { STRING63 "\\.", 0 },
  71     { STRING63 "z", 0 },
  72     { STRING63 ".example.com", allok },
  73     { STRING63 "." STRING63 "." STRING63 "." STRING60 "z", allok },
  74     { STRING63 "." STRING63 "." STRING63 "." STRING60 "z.", allok },
  75     { STRING63 "." STRING63 "." STRING63 "." STRING60 "zz", 0 },
  76     { STRING63 "." STRING63 "." STRING63 "." STRING60 "zzz", 0 },
  77     { "hostmaster@mail.example.com", dnok | mailok },
  78     { "hostmaster\\@mail.example.com", dnok | mailok },
  79     { "with whitespace", 0 },
  80     { "with\twhitespace", 0 },
  81     { "with\nwhitespace", 0 },
  82     { "with.whitespace ", 0 },
  83     { "with.whitespace\t", 0 },
  84     { "with.whitespace\n", 0 },
  85     { "with\\ whitespace", 0 },
  86     { "with\\\twhitespace", 0 },
  87     { "with\\\nwhitespace", 0 },
  88     { "with.whitespace\\ ", 0 },
  89     { "with.whitespace\\\t", 0 },
  90     { "with.whitespace\\\n", 0 },
  91   };
  92
  93 /* Run test case *TEST with FUNC (named FUNCNAME) and report an error
  94    if the result does not match the result flag at BIT.  */
  95 static void
  96 one_test (const struct test_case *test, const char *funcname,
  97           int (*func) (const char *), unsigned int bit)
  98 {
  99   int expected = (test->result & bit) != 0;
 100   int actual = func (test->dn);
 101   if (actual != expected)
 102     {
 103       support_record_failure ();
 104       printf ("error: %s (\"%s\"): expected=%d, actual=%d\n",
 105               funcname, test->dn, expected, actual);
 106     }
 107 }
 108
 109 /* Run 255 tests using all the bytes from 1 to 255, surround the byte
 110    with the strings PREFIX and SUFFIX, and check that FUNC (named
 111    FUNCNAME) accepts only those bytes listed in ACCEPTED.  */
 112 static void
 113 one_char (const char *prefix, const char *accepted, const char *suffix,
 114           const char *funcname, int (*func) (const char *))
 115 {
 116   for (int ch = 1; ch <= 255; ++ch)
 117     {
 118       char dn[1024];
 119       snprintf (dn, sizeof (dn), "%s%c%s", prefix, ch, suffix);
 120       int expected = strchr (accepted, ch) != NULL;
 121       int actual = func (dn);
 122       if (actual != expected)
 123         {
 124           support_record_failure ();
 125           printf ("error: %s (\"%s\"): expected=%d, actual=%d\n",
 126                   funcname, dn, expected, actual);
 127         }
 128     }
 129 }
 130
 131 #define LETTERSDIGITS \
 132   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
 133
 134 #define PRINTABLE \
 135   "!\"#$%&'()*+,/:;<=>?@[\\]^`{|}~"
 136
 137 static int
 138 do_test (void)
 139 {
 140   for (const struct test_case *test = tests; test < array_end (tests); ++test)
 141     {
 142       if (test_verbose)
 143         printf ("info: testing domain name [[[%s]]] (0x%x)\n",
 144                 test->dn, test->result);
 145       one_test (test, "res_hnok", res_hnok, hnok);
 146       one_test (test, "res_dnok", res_dnok, dnok);
 147       one_test (test, "res_mailok", res_mailok, mailok);
 148       one_test (test, "res_ownok", res_ownok, ownok);
 149     }
 150
 151   one_char
 152     ("", LETTERSDIGITS "._", "", "res_hnok", res_hnok);
 153   one_char
 154     ("middle",
 155      LETTERSDIGITS ".-_\\", /* "middle\\suffix" == "middlesuffix", so good.  */
 156      "suffix", "res_hnok", res_hnok);
 157   one_char
 158     ("middle",
 159      LETTERSDIGITS ".-_" PRINTABLE,
 160      "suffix.example", "res_mailok", res_mailok);
 161   one_char
 162     ("mailbox.middle",
 163      LETTERSDIGITS ".-_\\",
 164      "suffix.example", "res_mailok", res_mailok);
 165
 166   return 0;
 167 }
 168
 169 #include <support/test-driver.c>