2013-12-02 08:30:29 +00:00
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/* plugins.c
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* plugin routines
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#ifdef HAVE_PLUGINS
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#include <time.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <glib.h>
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#include <gmodule.h>
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#include <wsutil/filesystem.h>
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#include <wsutil/privileges.h>
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#include <wsutil/file_util.h>
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2017-04-08 19:45:19 +00:00
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#include <wsutil/report_message.h>
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2013-12-02 08:30:29 +00:00
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#include <wsutil/plugins.h>
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2016-07-24 12:53:39 +00:00
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#include <wsutil/ws_printf.h> /* ws_debug_printf */
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2013-12-02 08:30:29 +00:00
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typedef struct _plugin {
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GModule *handle; /* handle returned by g_module_open */
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gchar *name; /* plugin name */
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2017-09-25 18:05:40 +00:00
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const gchar *version; /* plugin version */
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2017-09-25 23:15:24 +00:00
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GString *types; /* description with types this plugin supports */
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2013-12-02 08:30:29 +00:00
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} plugin;
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2017-09-25 18:05:40 +00:00
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static GHashTable *plugins_table = NULL;
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static void
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free_plugin(gpointer _p)
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{
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plugin *p = (plugin *)_p;
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g_module_close(p->handle);
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g_free(p->name);
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2017-09-25 23:15:24 +00:00
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g_string_free(p->types, TRUE);
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2017-09-25 18:05:40 +00:00
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g_free(p);
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}
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2013-12-02 08:30:29 +00:00
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/*
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* Add a new plugin type.
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* Takes a callback routine as an argument; it is called for each plugin
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* we find, and handed a handle for the plugin, the name of the plugin,
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* and the version string for the plugin. The plugin returns TRUE if
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* it's a plugin for that type and FALSE if not.
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*/
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typedef struct {
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2017-09-25 23:15:24 +00:00
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const char *name;
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plugin_check_type_callback check_type;
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2013-12-02 08:30:29 +00:00
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} plugin_type;
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static GSList *plugin_types = NULL;
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2017-09-25 18:05:40 +00:00
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static void
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free_plugin_type(gpointer p, gpointer user_data _U_)
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{
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g_free(p);
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}
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2013-12-02 08:30:29 +00:00
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void
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2017-09-25 23:15:24 +00:00
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add_plugin_type(const char *name, plugin_check_type_callback check_type)
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2013-12-02 08:30:29 +00:00
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{
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plugin_type *new_type;
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new_type = (plugin_type *)g_malloc(sizeof (plugin_type));
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2017-09-25 23:15:24 +00:00
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new_type->name = name;
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new_type->check_type = check_type;
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plugin_types = g_slist_prepend(plugin_types, new_type);
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2013-12-02 08:30:29 +00:00
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}
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static void
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call_plugin_callback(gpointer data, gpointer user_data)
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{
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plugin_type *type = (plugin_type *)data;
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plugin *new_plug = (plugin *)user_data;
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2017-09-25 23:15:24 +00:00
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if (type->check_type(new_plug->handle)) {
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2013-12-02 08:30:29 +00:00
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/* The plugin supports this type */
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2017-09-25 23:15:24 +00:00
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if (new_plug->types->len > 0)
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g_string_append(new_plug->types, ", ");
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g_string_append(new_plug->types, type->name);
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2013-12-02 08:30:29 +00:00
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}
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}
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static void
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2016-09-05 23:26:29 +00:00
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plugins_scan_dir(const char *dirname, plugin_load_failure_mode mode)
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2013-12-02 08:30:29 +00:00
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{
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WS_DIR *dir; /* scanned directory */
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WS_DIRENT *file; /* current file */
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const char *name;
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2017-10-01 09:47:35 +00:00
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gchar *filename; /* current file name */
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2013-12-02 08:30:29 +00:00
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GModule *handle; /* handle returned by g_module_open */
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2017-10-01 09:47:35 +00:00
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gpointer symbol;
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2017-09-29 18:49:51 +00:00
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const char *plug_version, *plug_release;
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2013-12-02 08:30:29 +00:00
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plugin *new_plug;
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gchar *dot;
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2017-02-08 13:25:57 +00:00
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if (!g_file_test(dirname, G_FILE_TEST_EXISTS) || !g_file_test(dirname, G_FILE_TEST_IS_DIR)) {
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return;
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}
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2013-12-02 08:30:29 +00:00
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if ((dir = ws_dir_open(dirname, 0, NULL)) != NULL)
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{
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while ((file = ws_dir_read_name(dir)) != NULL)
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{
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name = ws_dir_get_name(file);
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/*
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* GLib 2.x defines G_MODULE_SUFFIX as the extension used on
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* this platform for loadable modules.
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*/
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/* skip anything but files with G_MODULE_SUFFIX */
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dot = strrchr(name, '.');
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if (dot == NULL || strcmp(dot+1, G_MODULE_SUFFIX) != 0)
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continue;
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2017-10-01 09:47:35 +00:00
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2016-12-13 18:28:29 +00:00
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#if WIN32
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if (strncmp(name, "nordic_ble.dll", 14) == 0)
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/*
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* Skip the Nordic BLE Sniffer dll on WIN32 because
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* the dissector has been added as internal.
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*/
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continue;
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#endif
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2017-02-08 13:25:57 +00:00
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2017-09-25 11:51:27 +00:00
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/*
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* Check if the same name is already registered.
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*/
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2017-09-25 18:05:40 +00:00
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if (g_hash_table_lookup(plugins_table, name)) {
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2017-09-25 11:51:27 +00:00
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/* Yes, it is. */
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if (mode == REPORT_LOAD_FAILURE) {
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report_warning("The plugin '%s' was found "
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2017-10-01 09:47:35 +00:00
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"in multiple directories", name);
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2017-09-25 11:51:27 +00:00
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}
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continue;
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}
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2017-10-01 09:47:35 +00:00
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filename = g_build_filename(dirname, name, (gchar *)NULL);
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handle = g_module_open(filename, G_MODULE_BIND_LOCAL);
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g_free(filename);
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if (handle == NULL)
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2013-12-02 08:30:29 +00:00
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{
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2016-09-05 23:26:29 +00:00
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/*
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* Only report load failures if we were asked to.
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*
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* XXX - we really should put different types of plugins
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* (libwiretap, libwireshark) in different subdirectories,
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* give libwiretap and libwireshark init routines that
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* load the plugins, and have them scan the appropriate
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* subdirectories so tha we don't even *try* to, for
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* example, load libwireshark plugins in programs that
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* only use libwiretap.
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*/
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if (mode == REPORT_LOAD_FAILURE) {
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2017-10-01 09:47:35 +00:00
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/* g_module_error() provides filename. */
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report_failure("Couldn't load plugin '%s': %s", name,
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2016-09-05 23:26:29 +00:00
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g_module_error());
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}
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2013-12-02 08:30:29 +00:00
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continue;
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}
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2017-09-29 18:49:51 +00:00
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if (!g_module_symbol(handle, "plugin_version", &symbol))
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2013-12-02 08:30:29 +00:00
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{
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2017-09-29 18:49:51 +00:00
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report_failure("The plugin '%s' has no \"plugin_version\" symbol", name);
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g_module_close(handle);
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continue;
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}
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plug_version = (const char *)symbol;
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if (!g_module_symbol(handle, "plugin_release", &symbol))
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{
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report_failure("The plugin '%s' has no \"plugin_release\" symbol", name);
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g_module_close(handle);
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continue;
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}
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plug_release = (const char *)symbol;
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if (strcmp(plug_release, VERSION_RELEASE) != 0) {
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report_failure("The plugin '%s' was compiled for Wireshark version %s", name, plug_release);
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2013-12-02 08:30:29 +00:00
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g_module_close(handle);
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continue;
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}
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new_plug = (plugin *)g_malloc(sizeof(plugin));
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new_plug->handle = handle;
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new_plug->name = g_strdup(name);
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2017-09-29 18:49:51 +00:00
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new_plug->version = plug_version;
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2017-09-25 23:15:24 +00:00
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new_plug->types = g_string_new(NULL);
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2013-12-02 08:30:29 +00:00
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/*
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* Hand the plugin to each of the plugin type callbacks.
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*/
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g_slist_foreach(plugin_types, call_plugin_callback, new_plug);
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/*
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* Does this dissector do anything useful?
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*/
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2017-09-25 23:15:24 +00:00
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if (new_plug->types->len == 0)
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2013-12-02 08:30:29 +00:00
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{
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/*
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* No.
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2016-09-06 17:14:12 +00:00
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*
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* Only report this failure if we were asked to; it might
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* just mean that it's a plugin type that this program
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* doesn't support, such as a libwireshark plugin in
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* a program that doesn't use libwireshark.
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*
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* XXX - we really should put different types of plugins
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* (libwiretap, libwireshark) in different subdirectories,
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* give libwiretap and libwireshark init routines that
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* load the plugins, and have them scan the appropriate
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* subdirectories so tha we don't even *try* to, for
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* example, load libwireshark plugins in programs that
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* only use libwiretap.
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2013-12-02 08:30:29 +00:00
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*/
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2016-09-06 17:14:12 +00:00
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if (mode == REPORT_LOAD_FAILURE) {
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report_failure("The plugin '%s' has no registration routines",
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name);
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}
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2017-09-25 23:15:24 +00:00
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free_plugin(new_plug);
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2013-12-02 08:30:29 +00:00
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continue;
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}
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/*
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2017-09-25 11:51:27 +00:00
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* OK, add it to the list of plugins.
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2013-12-02 08:30:29 +00:00
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*/
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2017-09-25 18:05:40 +00:00
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g_hash_table_insert(plugins_table, new_plug->name, new_plug);
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2013-12-02 08:30:29 +00:00
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}
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ws_dir_close(dir);
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}
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}
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/*
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2017-09-26 19:43:39 +00:00
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* Scan the buildir for plugins.
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2013-12-02 08:30:29 +00:00
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*/
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2017-09-26 19:43:39 +00:00
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static void
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scan_plugins_build_dir(plugin_load_failure_mode mode)
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2013-12-02 08:30:29 +00:00
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{
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const char *plugin_dir;
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const char *name;
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char *plugin_dir_path;
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WS_DIR *dir; /* scanned directory */
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2016-12-05 04:25:51 +00:00
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WS_DIRENT *file; /* current file */
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2013-12-02 08:30:29 +00:00
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2017-09-26 19:43:39 +00:00
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plugin_dir = get_plugins_dir();
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if ((dir = ws_dir_open(plugin_dir, 0, NULL)) == NULL)
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return;
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plugins_scan_dir(plugin_dir, mode);
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while ((file = ws_dir_read_name(dir)) != NULL)
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2013-12-02 08:30:29 +00:00
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{
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2017-09-26 19:43:39 +00:00
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name = ws_dir_get_name(file);
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if (strcmp(name, ".") == 0 || strcmp(name, "..") == 0)
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continue; /* skip "." and ".." */
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2013-12-02 08:30:29 +00:00
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/*
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2017-09-26 19:43:39 +00:00
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* Get the full path of a ".libs" subdirectory of that
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* directory.
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2013-12-02 08:30:29 +00:00
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*/
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2017-09-26 19:43:39 +00:00
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plugin_dir_path = g_build_filename(plugin_dir, name, ".libs", (gchar *)NULL);
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if (test_for_directory(plugin_dir_path) != EISDIR) {
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/*
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* Either it doesn't refer to a directory or it
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* refers to something that doesn't exist.
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*
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* Assume that means that the plugins are in
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* the subdirectory of the plugin directory, not
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* a ".libs" subdirectory of that subdirectory.
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*/
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g_free(plugin_dir_path);
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plugin_dir_path = g_build_filename(plugin_dir, name, (gchar *)NULL);
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2017-09-12 09:51:46 +00:00
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}
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2017-09-26 19:43:39 +00:00
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plugins_scan_dir(plugin_dir_path, mode);
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g_free(plugin_dir_path);
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}
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ws_dir_close(dir);
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}
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2013-12-02 08:30:29 +00:00
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2017-09-26 19:43:39 +00:00
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/*
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* Scan for plugins.
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*/
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void
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scan_plugins(plugin_load_failure_mode mode)
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{
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2017-10-22 19:30:07 +00:00
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if (!g_module_supported())
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return; /* nothing to do */
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2017-09-26 19:43:39 +00:00
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if (plugins_table != NULL)
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return; /* only scan for plugins once */
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plugins_table = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, free_plugin);
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/*
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* Scan the global plugin directory.
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* If we're running from a build directory, scan the "plugins"
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* subdirectory, as that's where plugins are located in an
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* out-of-tree build. If we find subdirectories scan those since
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|
* they will contain plugins in the case of an in-tree build.
|
|
|
|
*/
|
|
|
|
if (running_in_build_directory())
|
|
|
|
{
|
|
|
|
scan_plugins_build_dir(mode);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
plugins_scan_dir(get_plugins_dir_with_version(), mode);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If the program wasn't started with special privileges,
|
|
|
|
* scan the users plugin directory. (Even if we relinquish
|
|
|
|
* them, plugins aren't safe unless we've *permanently*
|
|
|
|
* relinquished them, and we can't do that in Wireshark as,
|
|
|
|
* if we need privileges to start capturing, we'd need to
|
|
|
|
* reclaim them before each time we start capturing.)
|
|
|
|
*/
|
|
|
|
if (!started_with_special_privs())
|
|
|
|
{
|
|
|
|
plugins_scan_dir(get_plugins_pers_dir_with_version(), mode);
|
2013-12-02 08:30:29 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2017-09-26 18:17:52 +00:00
|
|
|
add_plugin_to_descriptions(gpointer key _U_, gpointer value, gpointer user_data)
|
2013-12-02 08:30:29 +00:00
|
|
|
{
|
2017-09-26 18:17:52 +00:00
|
|
|
g_ptr_array_add((GPtrArray *)user_data, value);
|
2017-09-25 19:42:29 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2017-09-26 18:17:52 +00:00
|
|
|
compare_plugins(gconstpointer _a, gconstpointer _b)
|
2017-09-25 19:42:29 +00:00
|
|
|
{
|
2017-09-26 18:17:52 +00:00
|
|
|
const plugin *a = *(const plugin **)_a;
|
|
|
|
const plugin *b = *(const plugin **)_b;
|
2017-09-25 18:05:40 +00:00
|
|
|
|
2017-09-25 19:42:29 +00:00
|
|
|
return strcmp(a->name, b->name);
|
2013-12-02 08:30:29 +00:00
|
|
|
}
|
|
|
|
|
2017-09-26 18:17:52 +00:00
|
|
|
struct description_callback {
|
|
|
|
plugin_description_callback callback;
|
|
|
|
gpointer callback_data;
|
|
|
|
};
|
|
|
|
|
|
|
|
static void
|
|
|
|
call_description_callback(gpointer data, gpointer user_data)
|
|
|
|
{
|
|
|
|
plugin *plug = (plugin *)data;
|
|
|
|
struct description_callback *desc = (struct description_callback *)user_data;
|
|
|
|
|
|
|
|
desc->callback(plug->name, plug->version, plug->types->str, g_module_name(plug->handle), desc->callback_data);
|
|
|
|
}
|
|
|
|
|
2013-12-02 08:30:29 +00:00
|
|
|
WS_DLL_PUBLIC void
|
|
|
|
plugins_get_descriptions(plugin_description_callback callback, void *user_data)
|
|
|
|
{
|
2017-09-25 19:42:29 +00:00
|
|
|
GPtrArray *descriptions;
|
2017-09-26 18:17:52 +00:00
|
|
|
struct description_callback cb;
|
2017-09-25 19:42:29 +00:00
|
|
|
|
2017-10-22 19:30:07 +00:00
|
|
|
if (!plugins_table)
|
|
|
|
return;
|
|
|
|
|
2017-09-25 19:42:29 +00:00
|
|
|
descriptions = g_ptr_array_sized_new(g_hash_table_size(plugins_table));
|
2017-09-26 18:17:52 +00:00
|
|
|
g_hash_table_foreach(plugins_table, add_plugin_to_descriptions, descriptions);
|
|
|
|
g_ptr_array_sort(descriptions, compare_plugins);
|
|
|
|
cb.callback = callback;
|
|
|
|
cb.callback_data = user_data;
|
|
|
|
g_ptr_array_foreach(descriptions, call_description_callback, &cb);
|
|
|
|
g_ptr_array_free(descriptions, FALSE);
|
2013-12-02 08:30:29 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
print_plugin_description(const char *name, const char *version,
|
|
|
|
const char *description, const char *filename,
|
|
|
|
void *user_data _U_)
|
|
|
|
{
|
2016-07-24 12:53:39 +00:00
|
|
|
ws_debug_printf("%s\t%s\t%s\t%s\n", name, version, description, filename);
|
2013-12-02 08:30:29 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
plugins_dump_all(void)
|
|
|
|
{
|
|
|
|
plugins_get_descriptions(print_plugin_description, NULL);
|
|
|
|
}
|
|
|
|
|
2017-10-22 19:30:07 +00:00
|
|
|
int
|
|
|
|
plugins_get_count(void)
|
|
|
|
{
|
|
|
|
if (plugins_table)
|
|
|
|
return g_hash_table_size(plugins_table);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-02-08 13:25:57 +00:00
|
|
|
void
|
|
|
|
plugins_cleanup(void)
|
|
|
|
{
|
2017-10-22 19:30:07 +00:00
|
|
|
if (plugins_table)
|
|
|
|
g_hash_table_destroy(plugins_table);
|
2017-02-12 15:52:11 +00:00
|
|
|
g_slist_foreach(plugin_types, free_plugin_type, NULL);
|
|
|
|
g_slist_free(plugin_types);
|
2017-02-08 13:25:57 +00:00
|
|
|
}
|
|
|
|
|
2013-12-02 08:30:29 +00:00
|
|
|
#endif /* HAVE_PLUGINS */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Editor modelines
|
|
|
|
*
|
|
|
|
* Local Variables:
|
|
|
|
* c-basic-offset: 4
|
|
|
|
* tab-width: 8
|
|
|
|
* indent-tabs-mode: nil
|
|
|
|
* End:
|
|
|
|
*
|
|
|
|
* ex: set shiftwidth=4 tabstop=8 expandtab:
|
|
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
|
|
*/
|