forked from osmocom/wireshark
![Gilbert Ramirez](/assets/img/avatar_default.png)
Also move ncp222.py, x11-fields, process-x11-fields.pl, make-reg-dotc, and make-reg-dotc.py. Adjust #include lines in files that include packet-*.h files. svn path=/trunk/; revision=11410
419 lines
11 KiB
C
419 lines
11 KiB
C
/* plugins.c
|
|
* plugin routines
|
|
*
|
|
* $Id$
|
|
*
|
|
* Ethereal - Network traffic analyzer
|
|
* By Gerald Combs <gerald@ethereal.com>
|
|
* Copyright 1999 Gerald Combs
|
|
*
|
|
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#ifdef NEED_SNPRINTF_H
|
|
# include "snprintf.h"
|
|
#endif
|
|
|
|
#include "plugins.h"
|
|
|
|
#ifdef HAVE_PLUGINS
|
|
|
|
#include <time.h>
|
|
|
|
#ifdef HAVE_DIRENT_H
|
|
#include <dirent.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_DIRECT_H
|
|
#include <direct.h>
|
|
#endif
|
|
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
|
|
#ifdef HAVE_SYS_STAT_H
|
|
#include <sys/stat.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#include "filesystem.h"
|
|
|
|
#ifdef PLUGINS_NEED_ADDRESS_TABLE
|
|
#include "conversation.h"
|
|
#include "reassemble.h"
|
|
#include "prefs.h"
|
|
#include <epan/dissectors/packet-giop.h>
|
|
#include <epan/dissectors/packet-tpkt.h>
|
|
#include <epan/dissectors/packet-tcp.h>
|
|
#include <epan/dissectors/packet-rpc.h>
|
|
#include "tap.h"
|
|
#include "asn1.h"
|
|
#include <epan/dissectors/packet-per.h>
|
|
#include <epan/dissectors/packet-ber.h>
|
|
#include "xdlc.h"
|
|
#include "crc16.h"
|
|
#include "report_err.h"
|
|
#include "plugins/plugin_table.h"
|
|
static plugin_address_table_t patable = {
|
|
/* file generated by plugin_gen.py */
|
|
#include "plugins/Xass-list"
|
|
};
|
|
#endif
|
|
|
|
/* linked list of all plugins */
|
|
plugin *plugin_list;
|
|
|
|
#define PLUGINS_DIR_NAME "plugins"
|
|
|
|
/*
|
|
* add a new plugin to the list
|
|
* returns :
|
|
* - 0 : OK
|
|
* - ENOMEM : memory allocation problem
|
|
* - EEXIST : the same plugin (i.e. name/version) was already registered.
|
|
*/
|
|
static int
|
|
add_plugin(void *handle, gchar *name, gchar *version,
|
|
void (*reg_handoff)(void))
|
|
{
|
|
plugin *new_plug, *pt_plug;
|
|
|
|
pt_plug = plugin_list;
|
|
if (!pt_plug) /* the list is empty */
|
|
{
|
|
new_plug = (plugin *)g_malloc(sizeof(plugin));
|
|
if (new_plug == NULL) return ENOMEM;
|
|
plugin_list = new_plug;
|
|
}
|
|
else
|
|
{
|
|
while (1)
|
|
{
|
|
/* check if the same name/version is already registered */
|
|
if (!strcmp(pt_plug->name, name) &&
|
|
!strcmp(pt_plug->version, version))
|
|
{
|
|
return EEXIST;
|
|
}
|
|
|
|
/* we found the last plugin in the list */
|
|
if (pt_plug->next == NULL) break;
|
|
|
|
pt_plug = pt_plug->next;
|
|
}
|
|
new_plug = (plugin *)g_malloc(sizeof(plugin));
|
|
if (new_plug == NULL) return ENOMEM;
|
|
pt_plug->next = new_plug;
|
|
}
|
|
|
|
new_plug->handle = handle;
|
|
new_plug->name = name;
|
|
new_plug->version = version;
|
|
new_plug->reg_handoff = reg_handoff;
|
|
new_plug->next = NULL;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* XXX - when we remove support for old-style plugins (which we should
|
|
* probably do eventually, as all plugins should be written as new-style
|
|
* ones), we may want to have "init_plugins()" merely save a pointer
|
|
* to the plugin's "init" routine, just as we save a pointer to its
|
|
* "reg_handoff" routine, and have a "register_all_plugins()" routine
|
|
* to go through the list of plugins and call all of them.
|
|
*
|
|
* Then we'd have "epan_init()", or perhaps even something higher up
|
|
* in the call tree, call "init_plugins()", and have "proto_init()"
|
|
* call "register_all_plugins()" right after calling "register_all_protocols()";
|
|
* this might be a bit cleaner.
|
|
*/
|
|
static void
|
|
plugins_scan_dir(const char *dirname)
|
|
{
|
|
#define FILENAME_LEN 1024
|
|
#if GLIB_MAJOR_VERSION < 2
|
|
gchar *hack_path; /* pathname used to construct lt_lib_ext */
|
|
gchar *lt_lib_ext; /* extension for loadable modules */
|
|
DIR *dir; /* scanned directory */
|
|
struct dirent *file; /* current file */
|
|
gchar *name;
|
|
#else /* GLIB 2 */
|
|
GDir *dir; /* scanned directory */
|
|
GError **dummy;
|
|
const gchar *name;
|
|
#endif
|
|
gchar filename[FILENAME_LEN]; /* current file name */
|
|
GModule *handle; /* handle returned by dlopen */
|
|
gchar *version;
|
|
void (*init)(void *);
|
|
void (*reg_handoff)(void);
|
|
gchar *dot;
|
|
int cr;
|
|
|
|
#if GLIB_MAJOR_VERSION < 2
|
|
/*
|
|
* We find the extension used on this platform for loadable modules
|
|
* by the sneaky hack of calling "g_module_build_path" to build
|
|
* the pathname for a module with an empty directory name and
|
|
* empty module name, and then search for the last "." and use
|
|
* everything from the last "." on.
|
|
*/
|
|
hack_path = g_module_build_path("", "");
|
|
lt_lib_ext = strrchr(hack_path, '.');
|
|
if (lt_lib_ext == NULL)
|
|
{
|
|
/*
|
|
* Does this mean there *is* no extension? Assume so.
|
|
*
|
|
* XXX - the code below assumes that all loadable modules have
|
|
* an extension....
|
|
*/
|
|
lt_lib_ext = "";
|
|
}
|
|
|
|
if ((dir = opendir(dirname)) != NULL)
|
|
{
|
|
while ((file = readdir(dir)) != NULL)
|
|
{
|
|
/* don't try to open "." and ".." */
|
|
if (!(strcmp(file->d_name, "..") &&
|
|
strcmp(file->d_name, "."))) continue;
|
|
|
|
/* skip anything but files with lt_lib_ext */
|
|
dot = strrchr(file->d_name, '.');
|
|
if (dot == NULL || strcmp(dot, lt_lib_ext) != 0) continue;
|
|
|
|
snprintf(filename, FILENAME_LEN, "%s" G_DIR_SEPARATOR_S "%s",
|
|
dirname, file->d_name);
|
|
name = (gchar *)file->d_name;
|
|
#else /* GLIB 2 */
|
|
/*
|
|
* GLib 2.x defines G_MODULE_SUFFIX as the extension used on this
|
|
* platform for loadable modules.
|
|
*/
|
|
dummy = g_malloc(sizeof(GError *));
|
|
*dummy = NULL;
|
|
if ((dir = g_dir_open(dirname, 0, dummy)) != NULL)
|
|
{
|
|
while ((name = g_dir_read_name(dir)) != NULL)
|
|
{
|
|
/* skip anything but files with G_MODULE_SUFFIX */
|
|
dot = strrchr(name, '.');
|
|
if (dot == NULL || strcmp(dot+1, G_MODULE_SUFFIX) != 0) continue;
|
|
|
|
snprintf(filename, FILENAME_LEN, "%s" G_DIR_SEPARATOR_S "%s",
|
|
dirname, name);
|
|
#endif
|
|
if ((handle = g_module_open(filename, 0)) == NULL)
|
|
{
|
|
g_warning("Couldn't load module %s: %s", filename,
|
|
g_module_error());
|
|
continue;
|
|
}
|
|
if (g_module_symbol(handle, "version", (gpointer*)&version) == FALSE)
|
|
{
|
|
g_warning("The plugin %s has no version symbol", name);
|
|
g_module_close(handle);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Old-style dissectors don't have a "plugin_reg_handoff()"
|
|
* routine; we no longer support them.
|
|
*
|
|
* New-style dissectors have one, because, otherwise, there's
|
|
* no way for them to arrange that they ever be called.
|
|
*/
|
|
if (g_module_symbol(handle, "plugin_reg_handoff",
|
|
(gpointer*)®_handoff))
|
|
{
|
|
/*
|
|
* We require it to have a "plugin_init()" routine.
|
|
*/
|
|
if (!g_module_symbol(handle, "plugin_init", (gpointer*)&init))
|
|
{
|
|
g_warning("The plugin %s has a plugin_reg_handoff symbol but no plugin_init routine",
|
|
name);
|
|
g_module_close(handle);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* We have a "plugin_reg_handoff()" routine, so we don't
|
|
* need the protocol, filter string, or dissector pointer.
|
|
*/
|
|
if ((cr = add_plugin(handle, g_strdup(name), version,
|
|
reg_handoff)))
|
|
{
|
|
if (cr == EEXIST)
|
|
fprintf(stderr, "The plugin %s, version %s\n"
|
|
"was found in multiple directories\n", name, version);
|
|
else
|
|
fprintf(stderr, "Memory allocation problem\n"
|
|
"when processing plugin %s, version %s\n",
|
|
name, version);
|
|
g_module_close(handle);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Call its init routine.
|
|
*/
|
|
#ifdef PLUGINS_NEED_ADDRESS_TABLE
|
|
init(&patable);
|
|
#else
|
|
init(NULL);
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* This is an old-style dissector; warn that it won't
|
|
* be used, as those aren't supported.
|
|
*/
|
|
fprintf(stderr,
|
|
"The plugin %s, version %s is an old-style plugin;\n"
|
|
"Those are no longer supported.\n", name, version);
|
|
}
|
|
}
|
|
#if GLIB_MAJOR_VERSION < 2
|
|
closedir(dir);
|
|
}
|
|
g_free(hack_path);
|
|
#else /* GLIB 2 */
|
|
g_dir_close(dir);
|
|
}
|
|
g_clear_error(dummy);
|
|
g_free(dummy);
|
|
#endif
|
|
}
|
|
|
|
|
|
/* get the global plugin dir */
|
|
/* Return value is malloced so the caller should g_free() it. */
|
|
const char *get_plugins_global_dir(const char *plugin_dir)
|
|
{
|
|
#ifdef WIN32
|
|
char *install_plugin_dir;
|
|
|
|
/*
|
|
* On Windows, the data file directory is the installation
|
|
* directory; the plugins are stored under it.
|
|
*
|
|
* Assume we're running the installed version of Ethereal;
|
|
* on Windows, the data file directory is the directory
|
|
* in which the Ethereal binary resides.
|
|
*/
|
|
install_plugin_dir = g_strdup_printf("%s\\plugins\\%s", get_datafile_dir(), VERSION);
|
|
|
|
/*
|
|
* Make sure that pathname refers to a directory.
|
|
*/
|
|
if (test_for_directory(install_plugin_dir) != EISDIR) {
|
|
/*
|
|
* Either it doesn't refer to a directory or it
|
|
* refers to something that doesn't exist.
|
|
*
|
|
* Assume that means we're running, for example,
|
|
* a version of Ethereal we've built in a source
|
|
* directory, and fall back on the default
|
|
* installation directory, so you can put the plugins
|
|
* somewhere so they can be used with this version
|
|
* of Ethereal.
|
|
*
|
|
* XXX - should we, instead, have the Windows build
|
|
* procedure create a subdirectory of the "plugins"
|
|
* source directory, and copy the plugin DLLs there,
|
|
* so that you use the plugins from the build tree?
|
|
*/
|
|
g_free(install_plugin_dir);
|
|
install_plugin_dir =
|
|
g_strdup("C:\\Program Files\\Ethereal\\plugins\\" VERSION);
|
|
}
|
|
|
|
return install_plugin_dir;
|
|
#else
|
|
/*
|
|
* Scan the plugin directory.
|
|
*/
|
|
return strdup(plugin_dir);
|
|
#endif
|
|
}
|
|
|
|
|
|
/* get the personal plugin dir */
|
|
/* Return value is malloced so the caller should g_free() it. */
|
|
const char *get_plugins_pers_dir(void)
|
|
{
|
|
return get_persconffile_path(PLUGINS_DIR_NAME, FALSE);
|
|
}
|
|
|
|
/*
|
|
* init plugins
|
|
*/
|
|
void
|
|
init_plugins(const char *plugin_dir)
|
|
{
|
|
const char *datafile_dir;
|
|
|
|
if (plugin_list == NULL) /* ensure init_plugins is only run once */
|
|
{
|
|
/*
|
|
* Scan the global plugin directory.
|
|
*/
|
|
datafile_dir = get_plugins_global_dir(plugin_dir);
|
|
plugins_scan_dir(datafile_dir);
|
|
g_free((char *) datafile_dir);
|
|
|
|
/*
|
|
* Scan the users plugin directory.
|
|
*/
|
|
datafile_dir = get_plugins_pers_dir();
|
|
plugins_scan_dir(datafile_dir);
|
|
g_free((char *) datafile_dir);
|
|
}
|
|
}
|
|
|
|
void
|
|
register_all_plugin_handoffs(void)
|
|
{
|
|
plugin *pt_plug;
|
|
|
|
/*
|
|
* For all new-style plugins, call the register-handoff routine.
|
|
* This is called from "proto_init()"; it must be called after
|
|
* "register_all_protocols()" and "init_plugins()" are called,
|
|
* in case one plugin registers itself either with a built-in
|
|
* dissector or with another plugin; we must first register all
|
|
* dissectors, whether built-in or plugin, so their dissector tables
|
|
* are initialized, and only then register all handoffs.
|
|
*
|
|
* We treat those protocols as always being enabled; they should
|
|
* use the standard mechanism for enabling/disabling protocols, not
|
|
* the plugin-specific mechanism.
|
|
*/
|
|
for (pt_plug = plugin_list; pt_plug != NULL; pt_plug = pt_plug->next)
|
|
(pt_plug->reg_handoff)();
|
|
}
|
|
#endif
|