forked from osmocom/wireshark
166 lines
4.2 KiB
C
166 lines
4.2 KiB
C
/* wtap.h
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*
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* $Id$
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*
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* Wiretap Library
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* Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
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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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <glib.h>
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#include <gmodule.h>
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/* Why do we check for these symbols here? we do not include any real
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config.h so these symbols will never be true.
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*/
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#ifdef HAVE_DIRENT_H
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#include <dirent.h>
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#endif
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/* Since config.h is broken */
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#if GLIB_MAJOR_VERSION < 2
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#ifndef DIR
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#include <dirent.h>
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#endif
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#endif
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#ifdef HAVE_DIRECT_H
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#include <direct.h>
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#endif
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "wtap.h"
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#include "file_util.h"
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#define PLUGINS_DIR_NAME "wiretap_plugins"
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static gboolean plugins_loaded = FALSE;
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void wtap_load_plugins(char* dirname) {
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#define FILENAME_LEN 1024
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ETH_DIR *dir; /* scanned directory */
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ETH_DIRENT *file; /* current file */
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const char *name;
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#if GLIB_MAJOR_VERSION < 2
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gchar *hack_path; /* pathname used to construct lt_lib_ext */
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gchar *lt_lib_ext; /* extension for loadable modules */
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#endif
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gchar filename[FILENAME_LEN]; /* current file name */
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GModule *handle; /* handle returned by dlopen */
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gchar *version;
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gpointer gp;
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gchar *dot;
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if (plugins_loaded || ! dirname) return;
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plugins_loaded = TRUE;
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#if GLIB_MAJOR_VERSION < 2
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/*
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* We find the extension used on this platform for loadable modules
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* by the sneaky hack of calling "g_module_build_path" to build
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* the pathname for a module with an empty directory name and
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* empty module name, and then search for the last "." and use
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* everything from the last "." on.
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*/
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hack_path = g_module_build_path("", "");
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lt_lib_ext = strrchr(hack_path, '.');
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if (lt_lib_ext == NULL)
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{
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static gchar null_str[1] = {0};
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/*
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* Does this mean there *is* no extension? Assume so.
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*
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* XXX - the code below assumes that all loadable modules have
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* an extension....
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*/
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lt_lib_ext = null_str;
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}
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#endif
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if ((dir = eth_dir_open(dirname, 0, NULL)) != NULL)
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{
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while ((file = eth_dir_read_name(dir)) != NULL)
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{
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name = eth_dir_get_name(file);
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#if GLIB_MAJOR_VERSION < 2
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/* don't try to open "." and ".." */
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if (!(strcmp(name, "..") &&
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strcmp(name, ".")))
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continue;
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/* skip anything but files with lt_lib_ext */
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dot = strrchr(name, '.');
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if (dot == NULL || strcmp(dot, lt_lib_ext) != 0)
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continue;
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#else /* GLIB 2 */
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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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#endif
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g_snprintf(filename, FILENAME_LEN, "%s" G_DIR_SEPARATOR_S "%s",
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dirname, name);
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if ((handle = g_module_open(filename, 0)) == NULL)
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{
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g_warning("Couldn't load module %s: %s", filename,
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g_module_error());
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continue;
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}
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if (!g_module_symbol(handle, "version", &gp))
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{
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g_warning("The plugin %s has no version symbol", name);
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g_module_close(handle);
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continue;
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}
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version = gp;
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if (g_module_symbol(handle, "register_wtap_module", &gp))
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{
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void (*register_wtap_module)(void) = gp;
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register_wtap_module();
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}
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}
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eth_dir_close(dir);
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}
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#if GLIB_MAJOR_VERSION < 2
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g_free(hack_path);
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g_free(dirname);
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#endif
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}
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