src/plugin.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2009  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         if (desc->init == NULL)
  44                 return FALSE;
  45
  46         plugin = g_try_new0(struct connman_plugin, 1);
  47         if (plugin == NULL)
  48                 return FALSE;
  49
  50         plugin->handle = handle;
  51         plugin->desc = desc;
  52
  53         if (desc->init() < 0) {
  54                 g_free(plugin);
  55                 return FALSE;
  56         }
  57
  58         plugins = g_slist_append(plugins, plugin);
  59
  60         return TRUE;
  61 }
  62
  63 int __connman_plugin_init(const char *pattern)
  64 {
  65         GDir *dir;
  66         const gchar *file;
  67         gchar *filename;
  68
  69         DBG("");
  70
  71         dir = g_dir_open(PLUGINDIR, 0, NULL);
  72         if (dir != NULL) {
  73                 while ((file = g_dir_read_name(dir)) != NULL) {
  74                         void *handle;
  75                         struct connman_plugin_desc *desc;
  76
  77                         if (g_str_has_prefix(file, "lib") == TRUE ||
  78                                         g_str_has_suffix(file, ".so") == FALSE)
  79                                 continue;
  80
  81                         filename = g_build_filename(PLUGINDIR, file, NULL);
  82
  83                         handle = dlopen(filename, RTLD_NOW);
  84                         if (handle == NULL) {
  85                                 g_warning("Can't load %s: %s", filename,
  86                                                                 dlerror());
  87                                 g_free(filename);
  88                                 continue;
  89                         }
  90
  91                         g_free(filename);
  92
  93                         desc = dlsym(handle, "connman_plugin_desc");
  94                         if (desc == NULL) {
  95                                 g_warning("Can't load symbol: %s", dlerror());
  96                                 dlclose(handle);
  97                                 continue;
  98                         }
  99
 100                         if (g_pattern_match_simple(pattern,
 101                                                         desc->name) == FALSE) {
 102                                 DBG("ignoring %s", desc->description);
 103                                 dlclose(handle);
 104                                 continue;
 105                         }
 106
 107                         if (add_plugin(handle, desc) == FALSE)
 108                                 dlclose(handle);
 109                 }
 110
 111                 g_dir_close(dir);
 112         }
 113
 114         return 0;
 115 }
 116
 117 void __connman_plugin_cleanup(void)
 118 {
 119         GSList *list;
 120
 121         DBG("");
 122
 123         for (list = plugins; list; list = list->next) {
 124                 struct connman_plugin *plugin = list->data;
 125
 126                 if (plugin->desc->exit)
 127                         plugin->desc->exit();
 128
 129                 dlclose(plugin->handle);
 130
 131                 g_free(plugin);
 132         }
 133
 134         g_slist_free(plugins);
 135 }