git.maemo.org Git - connman/blob - 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         gboolean active;
  37         struct connman_plugin_desc *desc;
  38 };
  39
  40 static gint compare_priority(gconstpointer a, gconstpointer b)
  41 {
  42         const struct connman_plugin *plugin1 = a;
  43         const struct connman_plugin *plugin2 = b;
  44
  45         return plugin2->desc->priority - plugin1->desc->priority;
  46 }
  47
  48 static gboolean add_plugin(void *handle, struct connman_plugin_desc *desc)
  49 {
  50         struct connman_plugin *plugin;
  51
  52         if (desc->init == NULL)
  53                 return FALSE;
  54
  55         if (g_str_equal(desc->version, CONNMAN_VERSION) == FALSE) {
  56                 DBG("version mismatch for %s", desc->description);
  57                 return FALSE;
  58         }
  59
  60         plugin = g_try_new0(struct connman_plugin, 1);
  61         if (plugin == NULL)
  62                 return FALSE;
  63
  64         plugin->handle = handle;
  65         plugin->active = FALSE;
  66         plugin->desc = desc;
  67
  68         plugins = g_slist_insert_sorted(plugins, plugin, compare_priority);
  69
  70         return TRUE;
  71 }
  72
  73 int __connman_plugin_init(const char *pattern, const char *exclude)
  74 {
  75         GSList *list;
  76         GDir *dir;
  77         const gchar *file;
  78         gchar *filename;
  79
  80         DBG("");
  81
  82         dir = g_dir_open(PLUGINDIR, 0, NULL);
  83         if (dir != NULL) {
  84                 while ((file = g_dir_read_name(dir)) != NULL) {
  85                         void *handle;
  86                         struct connman_plugin_desc *desc;
  87
  88                         if (g_str_has_prefix(file, "lib") == TRUE ||
  89                                         g_str_has_suffix(file, ".so") == FALSE)
  90                                 continue;
  91
  92                         filename = g_build_filename(PLUGINDIR, file, NULL);
  93
  94                         handle = dlopen(filename, RTLD_NOW);
  95                         if (handle == NULL) {
  96                                 g_warning("Can't load %s: %s", filename,
  97                                                                 dlerror());
  98                                 g_free(filename);
  99                                 continue;
 100                         }
 101
 102                         g_free(filename);
 103
 104                         desc = dlsym(handle, "connman_plugin_desc");
 105                         if (desc == NULL) {
 106                                 g_warning("Can't load symbol: %s", dlerror());
 107                                 dlclose(handle);
 108                                 continue;
 109                         }
 110
 111                         if (exclude != NULL && g_pattern_match_simple(exclude,
 112                                                         desc->name) == TRUE) {
 113                                 DBG("excluding %s", desc->description);
 114                                 dlclose(handle);
 115                                 continue;
 116                         }
 117
 118                         if (pattern != NULL && g_pattern_match_simple(pattern,
 119                                                         desc->name) == FALSE) {
 120                                 DBG("ignoring %s", desc->description);
 121                                 dlclose(handle);
 122                                 continue;
 123                         }
 124
 125                         if (add_plugin(handle, desc) == FALSE)
 126                                 dlclose(handle);
 127                 }
 128
 129                 g_dir_close(dir);
 130         }
 131
 132         for (list = plugins; list; list = list->next) {
 133                 struct connman_plugin *plugin = list->data;
 134
 135                 if (plugin->desc->init() < 0)
 136                         continue;
 137
 138                 plugin->active = TRUE;
 139         }
 140
 141         return 0;
 142 }
 143
 144 void __connman_plugin_cleanup(void)
 145 {
 146         GSList *list;
 147
 148         DBG("");
 149
 150         for (list = plugins; list; list = list->next) {
 151                 struct connman_plugin *plugin = list->data;
 152
 153                 if (plugin->active == TRUE && plugin->desc->exit)
 154                         plugin->desc->exit();
 155
 156                 dlclose(plugin->handle);
 157
 158                 g_free(plugin);
 159         }
 160
 161         g_slist_free(plugins);
 162 }