src/libhydra/plugins/attr_sql/attr_sql_plugin.c

   1 /*
   2  * Copyright (C) 2008 Martin Willi
   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 <hydra.h>
  17 #include <utils/debug.h>
  18
  19 #include "attr_sql_plugin.h"
  20 #include "sql_attribute.h"
  21
  22 typedef struct private_attr_sql_plugin_t private_attr_sql_plugin_t;
  23
  24 /**
  25  * private data of attr_sql plugin
  26  */
  27 struct private_attr_sql_plugin_t {
  28
  29         /**
  30          * implements plugin interface
  31          */
  32         attr_sql_plugin_t public;
  33
  34         /**
  35          * database connection instance
  36          */
  37         database_t *db;
  38
  39         /**
  40          * configuration attributes
  41          */
  42         sql_attribute_t *attribute;
  43 };
  44
  45 METHOD(plugin_t, get_name, char*,
  46         private_attr_sql_plugin_t *this)
  47 {
  48         return "attr-sql";
  49 }
  50
  51 METHOD(plugin_t, destroy, void,
  52         private_attr_sql_plugin_t *this)
  53 {
  54         hydra->attributes->remove_provider(hydra->attributes, &this->attribute->provider);
  55         this->attribute->destroy(this->attribute);
  56         this->db->destroy(this->db);
  57         free(this);
  58 }
  59
  60 /*
  61  * see header file
  62  */
  63 plugin_t *attr_sql_plugin_create()
  64 {
  65         private_attr_sql_plugin_t *this;
  66         char *uri;
  67
  68         uri = lib->settings->get_str(lib->settings, "libhydra.plugins.attr-sql.database",
  69                                                                                                  NULL);
  70         if (!uri)
  71         {
  72                 DBG1(DBG_CFG, "attr-sql plugin: database URI not set");
  73                 return NULL;
  74         }
  75
  76         INIT(this,
  77                 .public = {
  78                         .plugin = {
  79                                 .get_name = _get_name,
  80                                 .reload = (void*)return_false,
  81                                 .destroy = _destroy,
  82                         },
  83                 },
  84                 .db = lib->db->create(lib->db, uri),
  85         );
  86
  87         if (!this->db)
  88         {
  89                 DBG1(DBG_CFG, "attr-sql plugin failed to connect to database");
  90                 free(this);
  91                 return NULL;
  92         }
  93         this->attribute = sql_attribute_create(this->db);
  94         hydra->attributes->add_provider(hydra->attributes, &this->attribute->provider);
  95
  96         return &this->public.plugin;
  97 }
  98