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