src/libcharon/plugins/resolve/resolve_plugin.c

   1 /*
   2  * Copyright (C) 2009 Martin Willi
   3  *
   4  * Copyright (C) secunet Security Networks AG
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2 of the License, or (at your
   9  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * for more details.
  15  */
  16
  17 #include "resolve_plugin.h"
  18 #include "resolve_handler.h"
  19
  20 #include <daemon.h>
  21
  22 typedef struct private_resolve_plugin_t private_resolve_plugin_t;
  23
  24 /**
  25  * private data of resolve plugin
  26  */
  27 struct private_resolve_plugin_t {
  28
  29         /**
  30          * implements plugin interface
  31          */
  32         resolve_plugin_t public;
  33
  34         /**
  35          * The registered DNS attribute handler
  36          */
  37         resolve_handler_t *handler;
  38 };
  39
  40 METHOD(plugin_t, get_name, char*,
  41         private_resolve_plugin_t *this)
  42 {
  43         return "resolve";
  44 }
  45
  46 /**
  47  * Register handler
  48  */
  49 static bool plugin_cb(private_resolve_plugin_t *this,
  50                                           plugin_feature_t *feature, bool reg, void *cb_data)
  51 {
  52         if (reg)
  53         {
  54                 charon->attributes->add_handler(charon->attributes,
  55                                                                                 &this->handler->handler);
  56         }
  57         else
  58         {
  59                 charon->attributes->remove_handler(charon->attributes,
  60                                                                                    &this->handler->handler);
  61         }
  62         return TRUE;
  63 }
  64
  65 METHOD(plugin_t, get_features, int,
  66         private_resolve_plugin_t *this, plugin_feature_t *features[])
  67 {
  68         static plugin_feature_t f[] = {
  69                 PLUGIN_CALLBACK((plugin_feature_callback_t)plugin_cb, NULL),
  70                         PLUGIN_PROVIDE(CUSTOM, "resolve"),
  71         };
  72         *features = f;
  73         return countof(f);
  74 }
  75
  76 METHOD(plugin_t, destroy, void,
  77         private_resolve_plugin_t *this)
  78 {
  79         this->handler->destroy(this->handler);
  80         free(this);
  81 }
  82
  83 /*
  84  * see header file
  85  */
  86 plugin_t *resolve_plugin_create()
  87 {
  88         private_resolve_plugin_t *this;
  89
  90         INIT(this,
  91                 .public = {
  92                         .plugin = {
  93                                 .get_name = _get_name,
  94                                 .get_features = _get_features,
  95                                 .destroy = _destroy,
  96                         },
  97                 },
  98                 .handler = resolve_handler_create(),
  99         );
 100
 101         return &this->public.plugin;
 102 }