src/plugin.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2008  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <dlfcn.h>
  27
  28 #include <glib.h>
  29
  30 #include "connman.h"
  31
  32 static GSList *plugins = NULL;
  33
  34 struct connman_plugin {
  35         void *handle;
  36         struct connman_plugin_desc *desc;
  37 };
  38
  39 static gboolean add_plugin(void *handle, struct connman_plugin_desc *desc)
  40 {
  41         struct connman_plugin *plugin;
  42
  43         plugin = g_try_new0(struct connman_plugin, 1);
  44         if (plugin == NULL)
  45                 return FALSE;
  46
  47         plugin->handle = handle;
  48         plugin->desc = desc;
  49
  50         if (desc->init() < 0) {
  51                 g_free(plugin);
  52                 return FALSE;
  53         }
  54
  55         plugins = g_slist_append(plugins, plugin);
  56
  57         return TRUE;
  58 }
  59
  60 int __connman_plugin_init(void)
  61 {
  62         GDir *dir;
  63         const gchar *file;
  64         gchar *filename;
  65
  66         DBG("");
  67
  68         dir = g_dir_open(PLUGINDIR, 0, NULL);
  69         if (dir != NULL) {
  70                 while ((file = g_dir_read_name(dir)) != NULL) {
  71                         void *handle;
  72                         struct connman_plugin_desc *desc;
  73
  74                         if (g_str_has_prefix(file, "lib") == TRUE ||
  75                                         g_str_has_suffix(file, ".so") == FALSE)
  76                                 continue;
  77
  78                         filename = g_build_filename(PLUGINDIR, file, NULL);
  79
  80                         handle = dlopen(filename, RTLD_NOW);
  81                         if (handle == NULL) {
  82                                 g_warning("Can't load %s: %s", filename,
  83                                                                 dlerror());
  84                                 g_free(filename);
  85                                 continue;
  86                         }
  87
  88                         g_free(filename);
  89
  90                         desc = dlsym(handle, "connman_plugin_desc");
  91                         if (desc == NULL) {
  92                                 g_warning("Can't load symbol: %s", dlerror());
  93                                 dlclose(handle);
  94                                 continue;
  95                         }
  96
  97                         if (desc->init == NULL) {
  98                                 dlclose(handle);
  99                                 continue;
 100                         }
 101
 102                         if (add_plugin(handle, desc) == FALSE)
 103                                 dlclose(handle);
 104                 }
 105
 106                 g_dir_close(dir);
 107         }
 108
 109         return 0;
 110 }
 111
 112 void __connman_plugin_cleanup(void)
 113 {
 114         GSList *list;
 115
 116         DBG("");
 117
 118         for (list = plugins; list; list = list->next) {
 119                 struct connman_plugin *plugin = list->data;
 120
 121                 if (plugin->desc->exit)
 122                         plugin->desc->exit();
 123
 124                 dlclose(plugin->handle);
 125
 126                 g_free(plugin);
 127         }
 128
 129         g_slist_free(plugins);
 130 }