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                 connman_error("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 static gboolean check_plugin(struct connman_plugin_desc *desc,
  78                                 const char *pattern, const char *exclude)
  79 {
  80         if (exclude != NULL &&
  81                         g_pattern_match_simple(exclude, desc->name) == TRUE) {
  82                 connman_info("Excluding %s", desc->description);
  83                 return FALSE;
  84         }
  85
  86         if (pattern != NULL &&
  87                         g_pattern_match_simple(pattern, desc->name) == FALSE) {
  88                 connman_info("Ignoring %s", desc->description);
  89                 return FALSE;
  90         }
  91
  92         return TRUE;
  93 }
  94
  95 #include "builtin.h"
  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                                 connman_error("Can't load %s: %s",
 130                                                         filename, 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                                 connman_error("Can't load symbol: %s",
 140                                                                 dlerror());
 141                                 dlclose(handle);
 142                                 continue;
 143                         }
 144
 145                         if (check_plugin(desc, pattern, exclude) == FALSE) {
 146                                 dlclose(handle);
 147                                 continue;
 148                         }
 149
 150                         if (add_plugin(handle, desc) == FALSE)
 151                                 dlclose(handle);
 152                 }
 153
 154                 g_dir_close(dir);
 155         }
 156
 157         for (list = plugins; list; list = list->next) {
 158                 struct connman_plugin *plugin = list->data;
 159
 160                 if (plugin->desc->init() < 0)
 161                         continue;
 162
 163                 plugin->active = TRUE;
 164         }
 165
 166         return 0;
 167 }
 168
 169 void __connman_plugin_cleanup(void)
 170 {
 171         GSList *list;
 172
 173         DBG("");
 174
 175         for (list = plugins; list; list = list->next) {
 176                 struct connman_plugin *plugin = list->data;
 177
 178                 if (plugin->active == TRUE && plugin->desc->exit)
 179                         plugin->desc->exit();
 180
 181                 if (plugin->handle != NULL)
 182                         dlclose(plugin->handle);
 183
 184                 g_free(plugin);
 185         }
 186
 187         g_slist_free(plugins);
 188 }