git.m6w6.name Git - awesomized/libmemcached/blob - libtest/dns.cc

   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  Data Differential YATL (i.e. libtest)  library
   4  *
   5  *  Copyright (C) 2012 Data Differential, http://datadifferential.com/
   6  *
   7  *  Redistribution and use in source and binary forms, with or without
   8  *  modification, are permitted provided that the following conditions are
   9  *  met:
  10  *
  11  *      * Redistributions of source code must retain the above copyright
  12  *  notice, this list of conditions and the following disclaimer.
  13  *
  14  *      * Redistributions in binary form must reproduce the above
  15  *  copyright notice, this list of conditions and the following disclaimer
  16  *  in the documentation and/or other materials provided with the
  17  *  distribution.
  18  *
  19  *      * The names of its contributors may not be used to endorse or
  20  *  promote products derived from this software without specific prior
  21  *  written permission.
  22  *
  23  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  26  *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  33  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  *
  35  */
  36
  37 #include "libtest/yatlcon.h"
  38 #include <libtest/common.h>
  39
  40 #include <sys/types.h>
  41 #include <sys/socket.h>
  42 #include <netdb.h>
  43
  44 namespace libtest {
  45
  46 bool lookup(const char* host)
  47 {
  48   assert(host);
  49   bool success= false;
  50   struct addrinfo *addrinfo= NULL;
  51
  52   int limit= 5;
  53   while (limit--)
  54   {
  55     int ret;
  56     if ((ret= getaddrinfo(host, NULL, NULL, &(addrinfo))))
  57     {
  58       switch (ret)
  59       {
  60       case EAI_AGAIN:
  61         continue;
  62
  63       case EAI_NONAME:
  64       default:
  65         break;
  66       }
  67     }
  68     else
  69     {
  70       success= true;
  71       break;
  72     }
  73   }
  74
  75   freeaddrinfo(addrinfo);
  76
  77   return success;
  78 }
  79
  80
  81 bool check_dns()
  82 {
  83   if (lookup("exist.gearman.info") == false)
  84   {
  85     return false;
  86   }
  87
  88   if (lookup("does_not_exist.gearman.info")) // This should fail, if it passes,...
  89   {
  90     return false;
  91   }
  92
  93   return true;
  94 }
  95
  96 } // namespace libtest
  97