forked from osmocom/wireshark
![Alexis La Goutte](/assets/img/avatar_default.png)
(Using sed : sed -i '/^ \* \$Id\$/,+1 d') Fix manually some typo (in export_object_dicom.c and crc16-plain.c) Change-Id: I4c1ae68d1c4afeace8cb195b53c715cf9e1227a8 Reviewed-on: https://code.wireshark.org/review/497 Reviewed-by: Anders Broman <a.broman58@gmail.com>
231 lines
6 KiB
C
231 lines
6 KiB
C
/* wspy_register.c
|
|
*
|
|
* Wireshark Protocol Python Binding
|
|
*
|
|
* Copyright (c) 2009 by Sebastien Tandel <sebastien [AT] tandel [dot] be>
|
|
* Copyright (c) 2001 by Gerald Combs <gerald@wireshark.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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#ifdef HAVE_PYTHON
|
|
#include <Python.h>
|
|
|
|
#include <glib.h>
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "epan.h"
|
|
#include "proto.h"
|
|
#include "packet.h"
|
|
#include "tvbuff.h"
|
|
#include "filesystem.h"
|
|
|
|
#include "wspy_register.h"
|
|
|
|
/* hash table containing all the registered python dissectors */
|
|
GHashTable * g_py_dissectors=NULL;
|
|
|
|
/**
|
|
* Global objects that python method dissect() will get. Avoid to write a
|
|
* function for each proto_tree*.
|
|
* Is it the only way to do that? I can't believe it ... think about it
|
|
*/
|
|
tvbuff_t * g_tvb = NULL;
|
|
packet_info * g_pinfo = NULL;
|
|
proto_tree * g_tree = NULL;
|
|
|
|
|
|
/* Initialization of the Python Interpreter */
|
|
static inline
|
|
void wspy_init(void)
|
|
{
|
|
Py_Initialize();
|
|
}
|
|
|
|
/* Finalization of the Python Interpreter */
|
|
static inline
|
|
void wspy_finalize(void)
|
|
{
|
|
Py_Finalize();
|
|
}
|
|
|
|
/*const char * py_dissector_short_desc(PyObject * py_dissector)
|
|
{
|
|
}*/
|
|
|
|
/**
|
|
* Returns the __str__ of the python object
|
|
*/
|
|
char * py_dissector_name(PyObject * py_dissector)
|
|
{
|
|
PyObject * py_object_name;
|
|
|
|
assert(py_dissector);
|
|
py_object_name = PyObject_Str(py_dissector);
|
|
|
|
#if PY_MAJOR_VERSION == 2
|
|
return PyString_AS_STRING(py_object_name);
|
|
#else
|
|
return PyUnicode_AsString(py_object_name);
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Register the dissector
|
|
*/
|
|
void py_dissector_register(PyObject * py_dissector)
|
|
{
|
|
/**
|
|
* Register protocol, fields, subtrees
|
|
*
|
|
* Done by calling register method of the object
|
|
*/
|
|
PyObject_CallMethod(py_dissector, "register_protocol", NULL);
|
|
|
|
}
|
|
|
|
static const char *get_py_register_file(void)
|
|
{
|
|
static const char * wspython_register_file = NULL;
|
|
|
|
if (!wspython_register_file) {
|
|
#ifdef _WIN32
|
|
wspython_register_file = g_strdup_printf("%s\\register-dissector.py", get_wspython_dir());
|
|
#else
|
|
wspython_register_file = g_strdup_printf("%s/register-dissector.py", get_wspython_dir());
|
|
#endif /* _WIN32 */
|
|
}
|
|
return wspython_register_file;
|
|
}
|
|
|
|
/**
|
|
* Finds out all the python dissectors and register them
|
|
*/
|
|
void register_all_py_protocols_func(void)
|
|
{
|
|
FILE * py_reg;
|
|
PyObject * global_dict, * main_module, * register_fn;
|
|
PyObject * py_dissectors, * py_dissector;
|
|
PyObject * py_args;
|
|
Py_ssize_t index;
|
|
char * name;
|
|
|
|
/* intialize the hash table where all the python dissectors are kept */
|
|
g_py_dissectors = g_hash_table_new(g_str_hash, g_str_equal);
|
|
|
|
/* STA TODO : init only if prefs is enabled */
|
|
wspy_init();
|
|
|
|
/* load the python register module */
|
|
py_reg = fopen(get_py_register_file(), "r");
|
|
if (py_reg == NULL) {
|
|
printf("Can't open Python registration file: %s\n", get_py_register_file());
|
|
return;
|
|
}
|
|
PyRun_SimpleFile(py_reg, get_py_register_file());
|
|
|
|
/* Getting the global symbols from the python register module */
|
|
main_module = PyImport_AddModule("__main__");
|
|
global_dict = PyModule_GetDict(main_module);
|
|
|
|
/* Get the python register function */
|
|
register_fn = PyDict_GetItemString(global_dict, "register_dissectors");
|
|
if (register_fn == NULL) {
|
|
printf("Error in Python registration file: %s\n", get_py_register_file());
|
|
return;
|
|
}
|
|
|
|
/* Execute the python register function */
|
|
/* This function returns a sequence of python dissectors objects */
|
|
py_args = Py_BuildValue("ss", get_wspython_dir(), get_plugins_pers_dir());
|
|
py_dissectors = PyObject_CallObject(register_fn, py_args);
|
|
|
|
/* Check that the py_dissectors is really a sequence */
|
|
if (!py_dissectors || !PySequence_Check(py_dissectors)) {
|
|
printf("Python dissectors not registered ...\n");
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* For each dissector, register it in cb and registers all fields, subtrees,
|
|
* protocol name, etc ...
|
|
*/
|
|
for (index = 0; (py_dissector = PySequence_GetItem(py_dissectors, index)); index++)
|
|
{
|
|
name = py_dissector_name(py_dissector);
|
|
py_dissector_register(py_dissector);
|
|
g_hash_table_insert(g_py_dissectors, (gpointer*)name, py_dissector);
|
|
}
|
|
}
|
|
|
|
void py_dissector_args(tvbuff_t ** tvb, packet_info ** pinfo, proto_tree ** tree)
|
|
{
|
|
*tvb = g_tvb;
|
|
*pinfo = g_pinfo;
|
|
*tree = g_tree;
|
|
}
|
|
|
|
/*
|
|
* Generic Python Dissector
|
|
*
|
|
* Search the correct PyObject dissector based on
|
|
* pinfo->current_proto in the hash table py_dissectors.
|
|
*
|
|
* We then call the method "dissect" of this PyObject.
|
|
*/
|
|
void py_dissect(tvbuff_t * tvb, packet_info * pinfo,
|
|
proto_tree * tree)
|
|
{
|
|
PyObject * py_dissector;
|
|
|
|
/* printf("pinfo->current_proto : %s\n", pinfo->current_proto); */
|
|
/* NOTE => pinfo->current_proto == "HomePlug" */
|
|
|
|
g_tree = tree;
|
|
g_pinfo = pinfo;
|
|
g_tvb = tvb;
|
|
|
|
py_dissector = g_hash_table_lookup(g_py_dissectors, pinfo->current_proto);
|
|
assert(py_dissector);
|
|
|
|
PyObject_CallMethod(py_dissector, "pre_dissect", NULL);
|
|
}
|
|
|
|
dissector_handle_t py_create_dissector_handle(const int proto)
|
|
{
|
|
return create_dissector_handle(&py_dissect, proto);
|
|
}
|
|
|
|
static void register_all_py_handoffs_foreach(gpointer key _U_, gpointer value, gpointer user_data _U_)
|
|
{
|
|
PyObject * py_dissector = (PyObject *)value;
|
|
|
|
PyObject_CallMethod(py_dissector, "register_handoff", NULL);
|
|
}
|
|
|
|
/**
|
|
* Finalize the registration of the python protocol dissectors
|
|
*/
|
|
void
|
|
register_all_py_handoffs_func(void)
|
|
{
|
|
g_hash_table_foreach(g_py_dissectors, register_all_py_handoffs_foreach, NULL);
|
|
}
|
|
|
|
#endif /* HAVE_PYTHON */
|