commit 5c1a69238fcb87ff7f916a5ce7960b2864afb3a1

Author: Florian Weimer <fweimer@redhat.com>

Date:   Sat Nov 11 11:23:40 2017 +0100

    resolv: Add tst-res_hnok

diff --git a/resolv/Makefile b/resolv/Makefile

index 988871086a70b291..b1fd2e2db8736f9b 100644

--- a/resolv/Makefile

+++ b/resolv/Makefile

@@ -50,6 +50,7 @@ tests += \

   tst-ns_name \

   tst-ns_name_compress \

   tst-res_hconf_reorder \

+  tst-res_hnok \

   tst-res_use_inet6 \

   tst-resolv-basic \

   tst-resolv-edns \

@@ -182,6 +183,7 @@ $(objpfx)tst-resolv-canonname: \

 $(objpfx)tst-ns_name: $(objpfx)libresolv.so

 $(objpfx)tst-ns_name.out: tst-ns_name.data

 $(objpfx)tst-ns_name_compress: $(objpfx)libresolv.so

+$(objpfx)tst-res_hnok: $(objpfx)libresolv.so

 # This test case uses the deprecated RES_USE_INET6 resolver option.

diff --git a/resolv/tst-res_hnok.c b/resolv/tst-res_hnok.c

new file mode 100644

index 0000000000000000..9c923038218e965c

--- /dev/null

+++ b/resolv/tst-res_hnok.c

@@ -0,0 +1,153 @@

+/* Tests for res_hnok and related functions.

+   Copyright (C) 2017 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

+   <http://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 },

+    { "www", allnomailok },

+    { "example", allnomailok },

+    { "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 },

+    { STRING63, allnomailok },

+    { STRING63 ".example.com", allok },

+    { STRING63 "." STRING63 "." STRING63 "." STRING60 "z", allok },

+    { "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);

+        }

+    }

+}

+

+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

+    ("", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789.",

+     "", "res_hnok", res_hnok);

+  one_char

+    ("middle",

+     "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789.-_",

+     "suffix", "res_hnok", res_hnok);

+  one_char

+    ("middle",

+     "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789.-_"

+     "!\"#$%&'()*+,/:;<=>?@[\\]^`{|}~",

+     "suffix.example", "res_mailok", res_mailok);

+  one_char

+    ("mailbox.middle",

+     "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789.-_",

+     "suffix.example", "res_mailok", res_mailok);

+

+  return 0;

+}

+

+#include <support/test-driver.c>