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 #ifdef CONNMAN_PLUGIN_BUILTIN
  31 #undef CONNMAN_PLUGIN_BUILTIN
  32 #endif
  33
  34 #include "connman.h"
  35
  36 static GSList *plugins = NULL;
  37
  38 struct connman_plugin {
  39         void *handle;
  40         gboolean active;
  41         struct connman_plugin_desc *desc;
  42 };
  43
  44 static gint compare_priority(gconstpointer a, gconstpointer b)
  45 {
  46         const struct connman_plugin *plugin1 = a;
  47         const struct connman_plugin *plugin2 = b;
  48
  49         return plugin2->desc->priority - plugin1->desc->priority;
  50 }
  51
  52 static gboolean add_plugin(void *handle, struct connman_plugin_desc *desc)
  53 {
  54         struct connman_plugin *plugin;
  55
  56         if (desc->init == NULL)
  57                 return FALSE;
  58
  59         if (g_str_equal(desc->version, CONNMAN_VERSION) == FALSE) {
  60                 DBG("version mismatch for %s", desc->description);
  61                 return FALSE;
  62         }
  63
  64         plugin = g_try_new0(struct connman_plugin, 1);
  65         if (plugin == NULL)
  66                 return FALSE;
  67
  68         plugin->handle = handle;
  69         plugin->active = FALSE;
  70         plugin->desc = desc;
  71
  72         plugins = g_slist_insert_sorted(plugins, plugin, compare_priority);
  73
  74         return TRUE;
  75 }
  76
  77 #include "builtin.h"
  78
  79 static gboolean check_plugin(struct connman_plugin_desc *desc,
  80                                 const char *pattern, const char *exclude)
  81 {
  82         if (exclude != NULL &&
  83                         g_pattern_match_simple(exclude, desc->name) == TRUE) {
  84                 DBG("excluding %s", desc->description);
  85                 return FALSE;
  86         }
  87
  88         if (pattern != NULL &&
  89                         g_pattern_match_simple(pattern, desc->name) == FALSE) {
  90                 DBG("ignoring %s", desc->description);
  91                 return FALSE;
  92         }
  93
  94         return TRUE;
  95 }
  96
  97 int __connman_plugin_init(const char *pattern, const char *exclude)
  98 {
  99         GSList *list;
 100         GDir *dir;
 101         const gchar *file;
 102         gchar *filename;
 103         unsigned int i;
 104
 105         DBG("");
 106
 107         for (i = 0; __connman_builtin[i]; i++) {
 108                 if (check_plugin(__connman_builtin[i],
 109                                                 pattern, exclude) == FALSE)
 110                         continue;
 111
 112                 add_plugin(NULL, __connman_builtin[i]);
 113         }
 114
 115         dir = g_dir_open(PLUGINDIR, 0, NULL);
 116         if (dir != NULL) {
 117                 while ((file = g_dir_read_name(dir)) != NULL) {
 118                         void *handle;
 119                         struct connman_plugin_desc *desc;
 120
 121                         if (g_str_has_prefix(file, "lib") == TRUE ||
 122                                         g_str_has_suffix(file, ".so") == FALSE)
 123                                 continue;
 124
 125                         filename = g_build_filename(PLUGINDIR, file, NULL);
 126
 127                         handle = dlopen(filename, RTLD_NOW);
 128                         if (handle == NULL) {
 129                                 g_warning("Can't load %s: %s", filename,
 130                                                                 dlerror());
 131                                 g_free(filename);
 132                                 continue;
 133                         }
 134
 135                         g_free(filename);
 136
 137                         desc = dlsym(handle, "connman_plugin_desc");
 138                         if (desc == NULL) {
 139                                 g_warning("Can't load symbol: %s", dlerror());
 140                                 dlclose(handle);
 141                                 continue;
 142                         }
 143
 144                         if (check_plugin(desc, pattern, exclude) == FALSE) {
 145                                 dlclose(handle);
 146                                 continue;
 147                         }
 148
 149                         if (add_plugin(handle, desc) == FALSE)
 150                                 dlclose(handle);
 151                 }
 152
 153                 g_dir_close(dir);
 154         }
 155
 156         for (list = plugins; list; list = list->next) {
 157                 struct connman_plugin *plugin = list->data;
 158
 159                 if (plugin->desc->init() < 0)
 160                         continue;
 161
 162                 plugin->active = TRUE;
 163         }
 164
 165         return 0;
 166 }
 167
 168 void __connman_plugin_cleanup(void)
 169 {
 170         GSList *list;
 171
 172         DBG("");
 173
 174         for (list = plugins; list; list = list->next) {
 175                 struct connman_plugin *plugin = list->data;
 176
 177                 if (plugin->active == TRUE && plugin->desc->exit)
 178                         plugin->desc->exit();
 179
 180                 if (plugin->handle != NULL)
 181                         dlclose(plugin->handle);
 182
 183                 g_free(plugin);
 184         }
 185
 186         g_slist_free(plugins);
 187 }