diff options
Diffstat (limited to 'src/plugin.c')
| -rw-r--r-- | src/plugin.c | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/src/plugin.c b/src/plugin.c new file mode 100644 index 0000000..3506553 --- /dev/null +++ b/src/plugin.c @@ -0,0 +1,249 @@ +/* + * + * BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org> + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <errno.h> +#include <dlfcn.h> +#include <string.h> +#include <sys/stat.h> + +#include <bluetooth/bluetooth.h> + +#include <glib.h> + +#include "plugin.h" +#include "log.h" +#include "hcid.h" +#include "btio.h" + +static GSList *plugins = NULL; + +struct bluetooth_plugin { + void *handle; + gboolean active; + struct bluetooth_plugin_desc *desc; +}; + +static gint compare_priority(gconstpointer a, gconstpointer b) +{ + const struct bluetooth_plugin *plugin1 = a; + const struct bluetooth_plugin *plugin2 = b; + + return plugin2->desc->priority - plugin1->desc->priority; +} + +static gboolean add_plugin(void *handle, struct bluetooth_plugin_desc *desc) +{ + struct bluetooth_plugin *plugin; + + if (desc->init == NULL) + return FALSE; + + if (g_str_equal(desc->version, VERSION) == FALSE) { + error("Version mismatch for %s", desc->name); + return FALSE; + } + + DBG("Loading %s plugin", desc->name); + + plugin = g_try_new0(struct bluetooth_plugin, 1); + if (plugin == NULL) + return FALSE; + + plugin->handle = handle; + plugin->active = FALSE; + plugin->desc = desc; + + plugins = g_slist_insert_sorted(plugins, plugin, compare_priority); + + return TRUE; +} + +static gboolean enable_plugin(const char *name, char **conf_disable, + char **cli_enable, char **cli_disable) +{ + if (conf_disable) { + for (; *conf_disable; conf_disable++) + if (g_pattern_match_simple(*conf_disable, name)) + break; + if (*conf_disable) { + info("Excluding (conf) %s", name); + return FALSE; + } + } + + if (cli_disable) { + for (; *cli_disable; cli_disable++) + if (g_pattern_match_simple(*cli_disable, name)) + break; + if (*cli_disable) { + info("Excluding (cli) %s", name); + return FALSE; + } + } + + if (cli_enable) { + for (; *cli_enable; cli_enable++) + if (g_pattern_match_simple(*cli_enable, name)) + break; + if (!*cli_enable) { + info("Ignoring (cli) %s", name); + return FALSE; + } + } + + return TRUE; +} + +#include "builtin.h" + +gboolean plugin_init(GKeyFile *config, const char *enable, const char *disable) +{ + GSList *list; + GDir *dir; + const gchar *file; + char **conf_disabled, **cli_disabled, **cli_enabled; + unsigned int i; + + /* Make a call to BtIO API so its symbols got resolved before the + * plugins are loaded. */ + bt_io_error_quark(); + + if (config) + conf_disabled = g_key_file_get_string_list(config, "General", + "DisablePlugins", + NULL, NULL); + else + conf_disabled = NULL; + + if (enable) + cli_enabled = g_strsplit_set(enable, ", ", -1); + else + cli_enabled = NULL; + + if (disable) + cli_disabled = g_strsplit_set(disable, ", ", -1); + else + cli_disabled = NULL; + + DBG("Loading builtin plugins"); + + for (i = 0; __bluetooth_builtin[i]; i++) { + if (!enable_plugin(__bluetooth_builtin[i]->name, conf_disabled, + cli_enabled, cli_disabled)) + continue; + + add_plugin(NULL, __bluetooth_builtin[i]); + } + + if (strlen(PLUGINDIR) == 0) + goto start; + + DBG("Loading plugins %s", PLUGINDIR); + + dir = g_dir_open(PLUGINDIR, 0, NULL); + if (!dir) + goto start; + + while ((file = g_dir_read_name(dir)) != NULL) { + struct bluetooth_plugin_desc *desc; + void *handle; + gchar *filename; + + if (g_str_has_prefix(file, "lib") == TRUE || + g_str_has_suffix(file, ".so") == FALSE) + continue; + + filename = g_build_filename(PLUGINDIR, file, NULL); + + handle = dlopen(filename, RTLD_NOW); + if (handle == NULL) { + error("Can't load plugin %s: %s", filename, + dlerror()); + g_free(filename); + continue; + } + + g_free(filename); + + desc = dlsym(handle, "bluetooth_plugin_desc"); + if (desc == NULL) { + error("Can't load plugin description: %s", dlerror()); + dlclose(handle); + continue; + } + + if (!enable_plugin(desc->name, conf_disabled, + cli_enabled, cli_disabled)) { + dlclose(handle); + continue; + } + + if (add_plugin(handle, desc) == FALSE) + dlclose(handle); + } + + g_dir_close(dir); + +start: + for (list = plugins; list; list = list->next) { + struct bluetooth_plugin *plugin = list->data; + + if (plugin->desc->init() < 0) { + error("Failed to init %s plugin", plugin->desc->name); + continue; + } + + plugin->active = TRUE; + } + + g_strfreev(conf_disabled); + g_strfreev(cli_enabled); + g_strfreev(cli_disabled); + + return TRUE; +} + +void plugin_cleanup(void) +{ + GSList *list; + + DBG("Cleanup plugins"); + + for (list = plugins; list; list = list->next) { + struct bluetooth_plugin *plugin = list->data; + + if (plugin->active == TRUE && plugin->desc->exit) + plugin->desc->exit(); + + if (plugin->handle != NULL) + dlclose(plugin->handle); + + g_free(plugin); + } + + g_slist_free(plugins); +} |