forked from osmocom/wireshark
79d58dc670
From Robert G. Jakabosky From me: cleanup so that it applies to trunk. svn path=/trunk/; revision=52798
470 lines
14 KiB
C
470 lines
14 KiB
C
/*
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* wslua.h
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*
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* Wireshark's interface to the Lua Programming Language
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*
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* (c) 2006, Luis E. Garcia Ontanon <luis@ontanon.org>
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* (c) 2007, Tamas Regos <tamas.regos@ericsson.com>
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* (c) 2008, Balint Reczey <balint.reczey@ericsson.com>
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*
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* $Id$
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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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#ifndef _PACKET_LUA_H
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#define _PACKET_LUA_H
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#include <glib.h>
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#include <errno.h>
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#include <string.h>
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#include <ctype.h>
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#include <lua.h>
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#include <lualib.h>
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#include <lauxlib.h>
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#include <wiretap/wtap.h>
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#include <wsutil/report_err.h>
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#include <wsutil/nstime.h>
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#include <epan/packet.h>
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#include <epan/strutil.h>
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#include <epan/prefs.h>
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#include <epan/proto.h>
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#include <epan/epan_dissect.h>
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#include <epan/tap.h>
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#include <epan/filesystem.h>
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#include <epan/funnel.h>
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#include <epan/tvbparse.h>
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#include <epan/epan.h>
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#include "declare_wslua.h"
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/** @file
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* @ingroup wslua_group
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*/
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#define WSLUA_INIT_ROUTINES "init_routines"
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#define WSLUA_PREFS_CHANGED "prefs_changed"
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#define LOG_DOMAIN_LUA "wslua"
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struct _wslua_tvb {
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tvbuff_t* ws_tvb;
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gboolean expired;
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gboolean need_free;
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};
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struct _wslua_pinfo {
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packet_info* ws_pinfo;
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gboolean expired;
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};
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struct _wslua_tvbrange {
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struct _wslua_tvb* tvb;
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int offset;
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int len;
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};
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struct _wslua_tw {
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funnel_text_window_t* ws_tw;
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gboolean expired;
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};
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typedef struct _wslua_field_t {
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int hfid;
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int ett;
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char* name;
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char* abbr;
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char* blob;
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enum ftenum type;
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unsigned base;
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const void* vs;
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guint32 mask;
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} wslua_field_t;
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/**
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* PREF_OBSOLETE is used for preferences that a module used to support
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* but no longer supports; we give different error messages for them.
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*/
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typedef enum {
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PREF_UINT,
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PREF_BOOL,
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PREF_ENUM,
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PREF_STRING,
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PREF_RANGE,
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PREF_STATIC_TEXT,
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PREF_OBSOLETE
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} pref_type_t;
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typedef struct _wslua_pref_t {
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gchar* name;
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gchar* label;
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gchar* desc;
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pref_type_t type;
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union {
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gboolean b;
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guint u;
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const gchar* s;
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gint e;
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range_t *r;
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void* p;
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} value;
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union {
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guint32 max_value; /**< maximum value of a range */
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struct {
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const enum_val_t *enumvals; /**< list of name & values */
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gboolean radio_buttons; /**< TRUE if it should be shown as
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radio buttons rather than as an
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option menu or combo box in
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the preferences tab */
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} enum_info; /**< for PREF_ENUM */
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} info; /**< display/text file information */
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struct _wslua_pref_t* next;
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struct _wslua_proto_t* proto;
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} wslua_pref_t;
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typedef struct _wslua_proto_t {
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gchar* name;
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gchar* desc;
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int hfid;
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int ett;
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wslua_pref_t prefs;
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int fields;
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module_t *prefs_module;
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dissector_handle_t handle;
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gboolean is_postdissector;
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} wslua_proto_t;
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struct _wslua_distbl_t {
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dissector_table_t table;
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const gchar* name;
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};
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struct _wslua_col_info {
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column_info* cinfo;
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gint col;
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gboolean expired;
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};
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struct _wslua_cols {
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column_info* cinfo;
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gboolean expired;
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};
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struct _wslua_private_table {
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GHashTable *table;
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gboolean is_allocated;
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gboolean expired;
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};
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struct _wslua_treeitem {
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proto_item* item;
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proto_tree* tree;
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gboolean expired;
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};
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typedef void (*tap_extractor_t)(lua_State*,const void*);
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struct _wslua_tap {
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gchar* name;
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gchar* filter;
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tap_extractor_t extractor;
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lua_State* L;
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int packet_ref;
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int draw_ref;
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int init_ref;
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};
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# define DIRECTORY_T GDir
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# define FILE_T gchar
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# define OPENDIR_OP(name) g_dir_open(name, 0, dir->dummy)
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# define DIRGETNEXT_OP(dir) g_dir_read_name(dir)
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# define GETFNAME_OP(file) (file);
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# define CLOSEDIR_OP(dir) g_dir_close(dir)
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struct _wslua_dir {
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DIRECTORY_T* dir;
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char* ext;
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GError** dummy;
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};
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struct _wslua_progdlg {
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funnel_progress_window_t* pw;
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char* title;
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char* task;
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gboolean stopped;
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};
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typedef struct { const char* name; tap_extractor_t extractor; } tappable_t;
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typedef struct {const gchar* str; enum ftenum id; } wslua_ft_types_t;
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typedef wslua_pref_t* Pref;
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typedef wslua_pref_t* Prefs;
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typedef struct _wslua_field_t* ProtoField;
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typedef struct _wslua_proto_t* Proto;
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typedef struct _wslua_distbl_t* DissectorTable;
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typedef dissector_handle_t Dissector;
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typedef GByteArray* ByteArray;
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typedef struct _wslua_tvb* Tvb;
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typedef struct _wslua_tvbrange* TvbRange;
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typedef struct _wslua_col_info* Column;
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typedef struct _wslua_cols* Columns;
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typedef struct _wslua_pinfo* Pinfo;
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typedef struct _wslua_treeitem* TreeItem;
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typedef address* Address;
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typedef nstime_t* NSTime;
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typedef gint64* Int64;
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typedef guint64* UInt64;
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typedef header_field_info** Field;
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typedef field_info* FieldInfo;
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typedef struct _wslua_tap* Listener;
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typedef struct _wslua_tw* TextWindow;
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typedef struct _wslua_progdlg* ProgDlg;
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typedef wtap_dumper* Dumper;
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typedef struct lua_pseudo_header* PseudoHeader;
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typedef tvbparse_t* Parser;
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typedef tvbparse_wanted_t* Rule;
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typedef tvbparse_elem_t* Node;
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typedef tvbparse_action_t* Shortcut;
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typedef struct _wslua_main* WireShark;
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typedef struct _wslua_dir* Dir;
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typedef struct _wslua_private_table* PrivateTable;
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/*
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* toXxx(L,idx) gets a Xxx from an index (Lua Error if fails)
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* checkXxx(L,idx) gets a Xxx from an index after calling check_code (No Lua Error if it fails)
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* pushXxx(L,xxx) pushes an Xxx into the stack
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* isXxx(L,idx) tests whether we have an Xxx at idx
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* shiftXxx(L,idx) removes and returns an Xxx from idx only if it has a type of Xxx, returns NULL otherwise
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* WSLUA_CLASS_DEFINE must be used with a trailing ';'
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* (a dummy typedef is used to be syntactically correct)
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*/
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#define WSLUA_CLASS_DEFINE(C,check_code,push_code) \
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C to##C(lua_State* L, int idx) { \
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C* v = (C*)lua_touserdata (L, idx); \
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if (!v) luaL_error(L, "bad argument %d (%s expected, got %s)", idx, #C, lua_typename(L, lua_type(L, idx))); \
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return v ? *v : NULL; \
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} \
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C check##C(lua_State* L, int idx) { \
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C* p; \
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luaL_checktype(L,idx,LUA_TUSERDATA); \
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p = (C*)luaL_checkudata(L, idx, #C); \
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check_code; \
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return p ? *p : NULL; \
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} \
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C* push##C(lua_State* L, C v) { \
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C* p; \
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luaL_checkstack(L,2,"Unable to grow stack\n"); \
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p = (C*)lua_newuserdata(L,sizeof(C)); *p = v; \
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luaL_getmetatable(L, #C); lua_setmetatable(L, -2); \
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push_code; \
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return p; \
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}\
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gboolean is##C(lua_State* L,int i) { \
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void *p; \
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if(!lua_isuserdata(L,i)) return FALSE; \
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p = lua_touserdata(L, i); \
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lua_getfield(L, LUA_REGISTRYINDEX, #C); \
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if (p == NULL || !lua_getmetatable(L, i) || !lua_rawequal(L, -1, -2)) p=NULL; \
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lua_pop(L, 2); \
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return p ? TRUE : FALSE; \
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} \
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C shift##C(lua_State* L,int i) { \
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C* p; \
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if(!lua_isuserdata(L,i)) return NULL; \
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p = (C*)lua_touserdata(L, i); \
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lua_getfield(L, LUA_REGISTRYINDEX, #C); \
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if (p == NULL || !lua_getmetatable(L, i) || !lua_rawequal(L, -1, -2)) p=NULL; \
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lua_pop(L, 2); \
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if (p) { lua_remove(L,i); return *p; }\
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else return NULL;\
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} \
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typedef int dummy##C
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#ifdef HAVE_LUA
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#define WSLUA_REGISTER_CLASS(C) { \
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/* check for existing class table in global */ \
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lua_getglobal (L, #C); \
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if (!lua_isnil (L, -1)) { \
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fprintf(stderr, "ERROR: Attempt to register class '%s' which already exists in global Lua table\n", #C); \
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exit(1); \
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} \
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lua_pop (L, 1); \
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/* create new class method table and 'register' the class methods into it */ \
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lua_newtable (L); \
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wslua_setfuncs (L, C ## _methods, 0); \
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/* add a method-table field named '__typeof' = the class name, this is used by the typeof() Lua func */ \
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lua_pushstring(L, #C); \
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lua_setfield(L, -2, "__typeof"); \
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/* create a new metatable and register metamethods into it */ \
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luaL_newmetatable (L, #C); \
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wslua_setfuncs (L, C ## _meta, 0); \
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/* add the '__gc' metamethod with a C-function named Class__gc */ \
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/* this will force ALL wslua classes to have a Class__gc function defined, which is good */ \
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lua_pushcfunction(L, C ## __gc); \
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lua_setfield(L, -2, "__gc"); \
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/* push a copy of the class methods table, and set it to be the metatable's __index field */ \
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lua_pushvalue (L, -2); \
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lua_setfield (L, -2, "__index"); \
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/* push a copy of the class methods table, and set it to be the metatable's __metatable field, to hide metatable */ \
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lua_pushvalue (L, -2); \
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lua_setfield (L, -2, "__metatable"); \
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/* pop the metatable */ \
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lua_pop (L, 1); \
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/* set the class methods table as the global class table */ \
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lua_setglobal (L, #C); \
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}
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#define WSLUA_REGISTER_META(C) { \
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/* check for existing metatable in registry */ \
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luaL_getmetatable(L, #C); \
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if (!lua_isnil (L, -1)) { \
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fprintf(stderr, "ERROR: Attempt to register metatable '%s' which already exists in Lua registry\n", #C); \
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exit(1); \
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} \
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lua_pop (L, 1); \
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/* create a new metatable and register metamethods into it */ \
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luaL_newmetatable (L, #C); \
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wslua_setfuncs (L, C ## _meta, 0); \
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/* add a metatable field named '__typeof' = the class name, this is used by the typeof() Lua func */ \
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lua_pushstring(L, #C); \
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lua_setfield(L, -2, "__typeof"); \
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/* add the '__gc' metamethod with a C-function named Class__gc */ \
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/* this will force ALL wslua classes to have a Class__gc function defined, which is good */ \
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lua_pushcfunction(L, C ## __gc); \
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lua_setfield(L, -2, "__gc"); \
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/* pop the metatable */ \
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lua_pop(L, 1); \
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}
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#define WSLUA_INIT(L) \
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luaL_openlibs(L); \
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wslua_register_classes(L); \
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wslua_register_functions(L);
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#endif
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#define WSLUA_FUNCTION extern int
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#define WSLUA_REGISTER_FUNCTION(name) { lua_pushcfunction(L, wslua_## name); lua_setglobal(L, #name); }
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#define WSLUA_REGISTER extern int
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#define WSLUA_METHOD static int
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#define WSLUA_CONSTRUCTOR static int
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#define WSLUA_ATTR_SET static int
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#define WSLUA_ATTR_GET static int
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#define WSLUA_METAMETHOD static int
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#define WSLUA_METHODS static const luaL_Reg
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#define WSLUA_META static const luaL_Reg
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#define WSLUA_CLASS_FNREG(class,name) { #name, class##_##name }
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#define WSLUA_CLASS_FNREG_ALIAS(class,aliasname,name) { #aliasname, class##_##name }
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#define WSLUA_ERROR(name,error) { luaL_error(L, ep_strdup_printf("%s%s", #name ": " ,error) ); return 0; }
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#define WSLUA_ARG_ERROR(name,attr,error) { luaL_argerror(L,WSLUA_ARG_ ## name ## _ ## attr, #name ": " error); return 0; }
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#define WSLUA_OPTARG_ERROR(name,attr,error) { luaL_argerror(L,WSLUA_OPTARG_##name##_ ##attr, #name ": " error); return 0; }
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#define WSLUA_REG_GLOBAL_BOOL(L,n,v) { lua_pushboolean(L,v); lua_setglobal(L,n); }
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#define WSLUA_REG_GLOBAL_STRING(L,n,v) { lua_pushstring(L,v); lua_setglobal(L,n); }
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#define WSLUA_REG_GLOBAL_NUMBER(L,n,v) { lua_pushnumber(L,v); lua_setglobal(L,n); }
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#define WSLUA_RETURN(i) return (i);
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#define WSLUA_API extern
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#define NOP
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#define FAIL_ON_NULL(s) if (! *p) luaL_argerror(L,idx,s)
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/* Clears or marks references that connects Lua to Wireshark structures */
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#define CLEAR_OUTSTANDING(C, marker, marker_val) void clear_outstanding_##C(void) { \
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while (outstanding_##C->len) { \
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C p = (C)g_ptr_array_remove_index_fast(outstanding_##C,0); \
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if (p) { \
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if (p->marker != marker_val) \
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p->marker = marker_val; \
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else \
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g_free(p); \
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} \
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} \
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}
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#define WSLUA_CLASS_DECLARE(C) \
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extern C to##C(lua_State* L, int idx); \
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extern C check##C(lua_State* L, int idx); \
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extern C* push##C(lua_State* L, C v); \
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extern int C##_register(lua_State* L); \
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extern gboolean is##C(lua_State* L,int i); \
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extern C shift##C(lua_State* L,int i)
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extern packet_info* lua_pinfo;
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extern TreeItem lua_tree;
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extern tvbuff_t* lua_tvb;
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extern dissector_handle_t lua_data_handle;
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extern gboolean lua_initialized;
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extern int lua_dissectors_table_ref;
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WSLUA_DECLARE_CLASSES()
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WSLUA_DECLARE_FUNCTIONS()
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extern lua_State* wslua_state(void);
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extern gboolean wslua_optbool(lua_State* L, int n, gboolean def);
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extern const gchar* lua_shiftstring(lua_State* L,int idx);
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extern void wslua_setfuncs(lua_State *L, const luaL_Reg *l, int nup);
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extern int dissect_lua(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, void* data);
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extern void wslua_prefs_changed(void);
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extern void proto_register_lua(void);
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extern GString* lua_register_all_taps(void);
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extern void wslua_prime_dfilter(epan_dissect_t *edt);
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extern void lua_prime_all_fields(proto_tree* tree);
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extern int Proto_commit(lua_State* L);
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extern Tvb* push_Tvb(lua_State* L, tvbuff_t* tvb);
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extern void clear_outstanding_Tvb(void);
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extern void clear_outstanding_TvbRange(void);
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extern Pinfo* push_Pinfo(lua_State* L, packet_info* p);
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extern void clear_outstanding_Pinfo(void);
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extern void clear_outstanding_Column(void);
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extern void clear_outstanding_Columns(void);
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extern void clear_outstanding_PrivateTable(void);
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extern TreeItem* push_TreeItem(lua_State* L, TreeItem ti);
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extern void clear_outstanding_TreeItem(void);
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extern void wslua_print_stack(char* s, lua_State* L);
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extern int wslua_init(register_cb cb, gpointer client_data);
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extern int wslua_cleanup(void);
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extern tap_extractor_t wslua_get_tap_extractor(const gchar* name);
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extern int wslua_set_tap_enums(lua_State* L);
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extern int luaopen_bit(lua_State *L);
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extern int wslua_is_field_available(lua_State* L, const char* field_abbr);
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#endif
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