src/libstrongswan/resolver/resolver_manager.c

   1 /*
   2  * Copyright (C) 2011-2012 Reto Guadagnini
   3  * Hochschule fuer Technik Rapperswil
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  */
  15
  16 #include "resolver_manager.h"
  17
  18 #include <utils/debug.h>
  19
  20 typedef struct private_resolver_manager_t private_resolver_manager_t;
  21
  22 /**
  23  * private data of resolver_manager
  24  */
  25 struct private_resolver_manager_t {
  26
  27         /**
  28          * public functions
  29          */
  30         resolver_manager_t public;
  31
  32         /**
  33          * constructor function to create resolver instances
  34          */
  35         resolver_constructor_t constructor;
  36 };
  37
  38 METHOD(resolver_manager_t, add_resolver, void,
  39         private_resolver_manager_t *this, resolver_constructor_t constructor)
  40 {
  41         if (!this->constructor)
  42         {
  43                 this->constructor = constructor;
  44         }
  45 }
  46
  47 METHOD(resolver_manager_t, remove_resolver, void,
  48         private_resolver_manager_t *this, resolver_constructor_t constructor)
  49 {
  50         if (this->constructor == constructor)
  51         {
  52                 this->constructor = NULL;
  53         }
  54 }
  55
  56 METHOD(resolver_manager_t, create, resolver_t*,
  57         private_resolver_manager_t *this)
  58 {
  59         return this->constructor();
  60 }
  61
  62 METHOD(resolver_manager_t, destroy, void,
  63         private_resolver_manager_t *this)
  64 {
  65         free(this);
  66 }
  67
  68 /*
  69  * See header
  70  */
  71 resolver_manager_t *resolver_manager_create()
  72 {
  73         private_resolver_manager_t *this;
  74
  75         INIT(this,
  76                         .public = {
  77                                 .add_resolver = _add_resolver,
  78                                 .remove_resolver = _remove_resolver,
  79                                 .create = _create,
  80                                 .destroy = _destroy,
  81                         },
  82         );
  83
  84         return &this->public;
  85 }
  86