resolv/tst-ns_name_pton.c

   1 /* Tests for ns_name_pton.
   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 <arpa/nameser.h>
  20 #include <array_length.h>
  21 #include <stdbool.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <support/check.h>
  26 #include <support/support.h>
  27 #include <support/test-driver.h>
  28
  29 /* Bits which indicate which functions are supposed to report
  30    success.  */
  31 enum
  32   {
  33     hnok = 1,
  34     dnok = 2,
  35     mailok = 4,
  36     ownok = 8,
  37     allnomailok = hnok | dnok | ownok,
  38     allok = hnok | dnok | mailok | ownok
  39   };
  40
  41 /* A string of 60 characters.  */
  42 #define STRING60 "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"
  43
  44 /* A string of 63 characters (maximum label length).  */
  45 #define STRING63 STRING60 "zzz"
  46
  47 /* A string of 60 bytes (non-ASCII).  */
  48 #define STRING60OCT \
  49   "\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377" \
  50   "\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377" \
  51   "\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377" \
  52   "\377\377\377\377\377\377\377\377\377"
  53
  54 /* A string of 63 bytes (non-ASCII).  */
  55 #define STRING63OCT STRING60OCT "\377\377\377"
  56
  57 /* A string of 60 bytes (non-ASCII, quoted decimal).  */
  58 #define STRING60DEC \
  59   "\\255\\255\\255\\255\\255\\255\\255\\255\\255\\255" \
  60   "\\255\\255\\255\\255\\255\\255\\255\\255\\255\\255" \
  61   "\\255\\255\\255\\255\\255\\255\\255\\255\\255\\255" \
  62   "\\255\\255\\255\\255\\255\\255\\255\\255\\255\\255" \
  63   "\\255\\255\\255\\255\\255\\255\\255\\255\\255\\255" \
  64   "\\255\\255\\255\\255\\255\\255\\255\\255\\255\\255"
  65
  66 /* A string of 63 bytes (non-ASCII, quoted decimal).  */
  67 #define STRING63DEC STRING60DEC "\\255\\255\\255"
  68
  69 /* Combines a test name with the expected results.  */
  70 struct test_case
  71 {
  72   const char *dn;
  73   const char *back; /* Expected test result converted using ns_name_ntop.  */
  74   bool fully_qualified; /* True if the domain name has a trailing dot.  */
  75 };
  76
  77 static const struct test_case tests[] =
  78   {
  79     { "", ".", false },
  80     { ".", ".", true },
  81     { "..", NULL, },
  82     { "www", "www", false },
  83     { "www.", "www", true },
  84     { "www\\.", "www\\.", false },
  85     { ".www", NULL, },
  86     { ".www\\.", NULL, },
  87     { "example.com", "example.com", false },
  88     { "example.com.", "example.com", true },
  89     { ".example.com", NULL, },
  90     { ".example.com.", NULL, },
  91     { "example\\.com", "example\\.com", false },
  92     { "example\\.com.", "example\\.com", true },
  93     { "example..", NULL, },
  94     { "example..com", NULL, },
  95     { "example..com", NULL, },
  96     { "\\0", NULL, },
  97     { "\\00", NULL, },
  98     { "\\000", "\\000", false },
  99     { "\\1", NULL, },
 100     { "\\01", NULL, },
 101     { "\\001", "\\001", false },
 102     { "\\1x", NULL, },
 103     { "\\01x", NULL, },
 104     { "\\001x", "\\001x", false },
 105     { "\\256", NULL, },
 106     { "\\0641", "\\@1", false },
 107     { "\\0011", "\\0011", false },
 108     { STRING63, STRING63, false },
 109     { STRING63 ".", STRING63, true },
 110     { STRING63 "z", NULL, },
 111     { STRING63 "\\.", NULL, },
 112     { STRING60 "zz\\.", STRING60 "zz\\.", false },
 113     { STRING60 "zz\\..", STRING60 "zz\\.", true },
 114     { STRING63 "." STRING63 "." STRING63 "." STRING60 "z",
 115       STRING63 "." STRING63 "." STRING63 "." STRING60 "z", false },
 116     { STRING63 "." STRING63 "." STRING63 "." STRING60 "z.",
 117       STRING63 "." STRING63 "." STRING63 "." STRING60 "z", true },
 118     { STRING63 "." STRING63 "." STRING63 "." STRING60 "zz", NULL, },
 119     { STRING63 "." STRING63 "." STRING63 "." STRING60 "zzz", NULL, },
 120     { STRING63OCT "." STRING63OCT "." STRING63OCT "." STRING60OCT "\377",
 121       STRING63DEC "." STRING63DEC "." STRING63DEC "." STRING60DEC "\\255",
 122       false },
 123     { STRING63OCT "." STRING63OCT "." STRING63OCT "." STRING60OCT "\377.",
 124       STRING63DEC "." STRING63DEC "." STRING63DEC "." STRING60DEC "\\255",
 125       true },
 126     { STRING63OCT "." STRING63OCT "." STRING63OCT "." STRING60OCT
 127       "\377\377", NULL, },
 128     { STRING63OCT "." STRING63OCT "." STRING63OCT "." STRING60OCT
 129       "\377\377\377", NULL, },
 130     { "\\", NULL, },
 131     { "\\\\", "\\\\", false },
 132     { "\\\\.", "\\\\", true },
 133     { "\\\\\\", NULL, },
 134     { "a\\", NULL, },
 135     { "a.\\", NULL, },
 136     { "a.b\\", NULL, },
 137   };
 138
 139 static int
 140 do_test (void)
 141 {
 142   unsigned char *wire = xmalloc (NS_MAXCDNAME);
 143   char *text = xmalloc (NS_MAXDNAME);
 144   for (const struct test_case *test = tests; test < array_end (tests); ++test)
 145     {
 146       if (test_verbose)
 147         printf ("info: testing domain name [[[%s]]]\n", test->dn);
 148       int ret = ns_name_pton (test->dn, wire, NS_MAXCDNAME);
 149       if (ret == -1)
 150         {
 151           if (test->back != NULL)
 152             {
 153               support_record_failure ();
 154               printf ("error: unexpected decoding failure for [[%s]]\n",
 155                       test->dn);
 156             }
 157           /* Otherwise, we have an expected decoding failure.  */
 158           continue;
 159         }
 160
 161       if (ret < -1 || ret > 1)
 162         {
 163           support_record_failure ();
 164           printf ("error: invalid return value %d for [[%s]]\n",
 165                   ret, test->dn);
 166           continue;
 167         }
 168
 169       int ret2 = ns_name_ntop (wire, text, NS_MAXDNAME);
 170
 171       if (ret2 < 0)
 172         {
 173           support_record_failure ();
 174           printf ("error: failure to convert back [[%s]]\n", test->dn);
 175         }
 176
 177       if (test->back == NULL)
 178         {
 179           support_record_failure ();
 180           printf ("error: unexpected success converting [[%s]]\n", test->dn);
 181           if (ret2 >= 1)
 182             printf ("error:   result converts back to [[%s]]\n", test->dn);
 183           continue;
 184         }
 185
 186       if (strcmp (text, test->back) != 0)
 187         {
 188           support_record_failure ();
 189           printf ("error: back-conversion of [[%s]] did not match\n",
 190                   test->dn);
 191           printf ("error:   expected: [[%s]]\n", test->back);
 192           printf ("error:     actual: [[%s]]\n", text);
 193         }
 194
 195       if (ret != test->fully_qualified)
 196         {
 197           support_record_failure ();
 198           printf ("error: invalid fully-qualified status for [[%s]]\n",
 199                   test->dn);
 200           printf ("error:   expected: %d\n", (int) test->fully_qualified);
 201           printf ("error:     actual: %d\n", ret);
 202         }
 203     }
 204
 205   free (text);
 206   free (wire);
 207   return 0;
 208 }
 209
 210 #include <support/test-driver.c>