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/*
* wslua_util.c
*
* (c) 2006, Luis E. Garcia Ontanon <luis@ontanon.org>
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 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.
*/
/* WSLUA_MODULE Utility Utility Functions */
#include "wslua.h"
#include <math.h>
#include <epan/stat_cmd_args.h>
WSLUA_API gboolean wslua_optbool(lua_State* L, int n, gboolean def) {
gboolean val = FALSE;
if ( lua_isboolean(L,n) ) {
val = lua_toboolean(L,n);
} else if ( lua_isnil(L,n) || lua_gettop(L) < n ){
val = def;
} else {
luaL_argerror(L,n,"must be a boolean");
}
return val;
}
WSLUA_API const gchar* lua_shiftstring(lua_State* L, int i) {
const gchar* p = luaL_checkstring(L, i);
if (p) {
lua_remove(L,i);
return p;
} else {
return NULL;
}
}
WSLUA_FUNCTION wslua_format_date(lua_State* LS) { /* Formats an absolute timestamp into a human readable date */
#define WSLUA_ARG_format_date_TIMESTAMP 1 /* A timestamp value to convert. */
lua_Number timestamp = luaL_checknumber(LS,WSLUA_ARG_format_date_TIMESTAMP);
nstime_t then;
gchar* str;
then.secs = (guint32)floor(timestamp);
then.nsecs = (guint32) ( (timestamp-(double)(then.secs))*1000000000);
str = abs_time_to_str(&then, ABSOLUTE_TIME_LOCAL);
lua_pushstring(LS,str);
WSLUA_RETURN(1); /* A string with the formated date */
}
WSLUA_FUNCTION wslua_format_time(lua_State* LS) { /* Formats a relative timestamp in a human readable form */
#define WSLUA_ARG_format_time_TIMESTAMP 1 /* A timestamp value to convert */
lua_Number timestamp = luaL_checknumber(LS,WSLUA_ARG_format_time_TIMESTAMP);
nstime_t then;
gchar* str;
then.secs = (guint32)floor(timestamp);
then.nsecs = (guint32) ( (timestamp-(double)(then.secs))*1000000000);
str = rel_time_to_str(&then);
lua_pushstring(LS,str);
WSLUA_RETURN(1); /* A string with the formated time */
}
WSLUA_FUNCTION wslua_report_failure(lua_State* LS) { /* Reports a failure to the user */
#define WSLUA_ARG_report_failure_TEXT 1 /* Message */
const gchar* s = luaL_checkstring(LS,WSLUA_ARG_report_failure_TEXT);
report_failure("%s",s);
return 0;
}
static int wslua_log(lua_State* L, GLogLevelFlags log_level) {
GString* str = g_string_new("");
int n = lua_gettop(L); /* Number of arguments */
int i;
lua_getglobal(L, "tostring");
for (i=1; i<=n; i++) {
const char *s;
lua_pushvalue(L, -1); /* function to be called */
lua_pushvalue(L, i); /* value to print */
lua_call(L, 1, 1);
s = lua_tostring(L, -1); /* get result */
if (s == NULL)
return luaL_error(L, "`tostring' must return a string");
if (i>1) g_string_append(str,"\t");
g_string_append(str,s);
lua_pop(L, 1); /* pop result */
}
g_log(LOG_DOMAIN_LUA, log_level, "%s\n", str->str);
g_string_free(str,TRUE);
return 0;
}
WSLUA_FUNCTION wslua_critical( lua_State* L ) { /* Will add a log entry with critical severity*/
/* WSLUA_MOREARGS critical objects to be printed */
wslua_log(L,G_LOG_LEVEL_CRITICAL);
return 0;
}
WSLUA_FUNCTION wslua_warn( lua_State* L ) { /* Will add a log entry with warn severity */
/* WSLUA_MOREARGS warn objects to be printed */
wslua_log(L,G_LOG_LEVEL_WARNING);
return 0;
}
WSLUA_FUNCTION wslua_message( lua_State* L ) { /* Will add a log entry with message severity */
/* WSLUA_MOREARGS message objects to be printed */
wslua_log(L,G_LOG_LEVEL_MESSAGE);
return 0;
}
WSLUA_FUNCTION wslua_info( lua_State* L ) { /* Will add a log entry with info severity */
/* WSLUA_MOREARGS info objects to be printed */
wslua_log(L,G_LOG_LEVEL_INFO);
return 0;
}
WSLUA_FUNCTION wslua_debug( lua_State* L ) { /* Will add a log entry with debug severity */
/* WSLUA_MOREARGS debug objects to be printed */
wslua_log(L,G_LOG_LEVEL_DEBUG);
return 0;
}
/* The returned filename is g_malloc()'d so the caller must free it */
/* except when NULL is returned if file doesn't exist */
static char* wslua_get_actual_filename(const char* fname) {
char fname_clean[256];
char* f;
char* filename;
strncpy(fname_clean,fname,255);
fname_clean[255] = '\0';
for(f = fname_clean; *f; f++) {
switch(*f) {
case '/': case '\\':
*f = *(G_DIR_SEPARATOR_S);
break;
default:
break;
}
}
if ( file_exists(fname_clean) ) {
return g_strdup(fname_clean);
}
filename = get_persconffile_path(fname_clean,FALSE,FALSE);
if ( file_exists(filename) ) {
return filename;
}
g_free(filename);
filename = get_datafile_path(fname_clean);
if ( file_exists(filename) ) {
return filename;
}
g_free(filename);
return NULL;
}
WSLUA_FUNCTION wslua_loadfile(lua_State* L) {
/* Lua's loadfile() has been modified so that if a file does not exist
in the current directory it will look for it in wireshark's user and system directories */
#define WSLUA_ARG_loadfile_FILENAME 1 /* Name of the file to be loaded */
const char *given_fname = luaL_checkstring(L, WSLUA_ARG_loadfile_FILENAME);
char* filename;
filename = wslua_get_actual_filename(given_fname);
if (!filename) WSLUA_ARG_ERROR(loadfile,FILENAME,"file does not exist");
if (luaL_loadfile(L, filename) == 0) {
g_free(filename);
return 1;
} else {
g_free(filename);
lua_pushnil(L);
lua_insert(L, -2);
return 2;
}
}
WSLUA_FUNCTION wslua_dofile(lua_State* L) {
/* Lua's dofile() has been modified so that if a file does not exist
in the current directory it will look for it in wireshark's user and system directories */
#define WSLUA_ARG_dofile_FILENAME 1 /* Name of the file to be run */
const char *given_fname = luaL_checkstring(L, WSLUA_ARG_dofile_FILENAME);
char* filename;
int n;
if (!given_fname) WSLUA_ARG_ERROR(dofile,FILENAME,"must be a string");
filename = wslua_get_actual_filename(given_fname);
if (!filename) WSLUA_ARG_ERROR(dofile,FILENAME,"file does not exist");
n = lua_gettop(L);
if (luaL_loadfile(L, filename) != 0) lua_error(L);
g_free(filename);
lua_call(L, 0, LUA_MULTRET);
return lua_gettop(L) - n;
}
WSLUA_FUNCTION wslua_persconffile_path(lua_State* L) {
#define WSLUA_OPTARG_persconffile_path_FILENAME 1 /* A filename */
const char *fname = luaL_optstring(L, WSLUA_OPTARG_persconffile_path_FILENAME,"");
const char* filename = get_persconffile_path(fname,FALSE,FALSE);
lua_pushstring(L,filename);
WSLUA_RETURN(1); /* The full pathname for a file in the personal configuration directory */
}
WSLUA_FUNCTION wslua_datafile_path(lua_State* L) {
#define WSLUA_OPTARG_datafile_path_FILENAME 1 /* A filename */
const char *fname = luaL_optstring(L, WSLUA_OPTARG_datafile_path_FILENAME,"");
const char* filename = get_datafile_path(fname);
lua_pushstring(L,filename);
WSLUA_RETURN(1); /* The full pathname for a file in wireshark's configuration directory */
}
WSLUA_CLASS_DEFINE(Dir,NOP,NOP); /* A Directory */
WSLUA_CONSTRUCTOR Dir_open(lua_State* L) {
/* Usage: for filename in Dir.open(path) do ... end */
#define WSLUA_ARG_Dir_open_PATHNAME 1 /* The pathname of the directory */
#define WSLUA_OPTARG_Dir_open_EXTENSION 2 /* If given, only file with this extension will be returned */
const char* dirname = luaL_checkstring(L,WSLUA_ARG_Dir_open_PATHNAME);
const char* extension = luaL_optstring(L,WSLUA_OPTARG_Dir_open_EXTENSION,NULL);
Dir dir;
char* dirname_clean;
if (!dirname) WSLUA_ARG_ERROR(Dir_open,PATHNAME,"must be a string");
dirname_clean = wslua_get_actual_filename(dirname);
if (!dirname_clean) WSLUA_ARG_ERROR(Dir_open,PATHNAME,"directory does not exist");
if (!test_for_directory(dirname_clean)) {
g_free(dirname_clean);
WSLUA_ARG_ERROR(Dir_open,PATHNAME, "must be a directory");
}
dir = g_malloc(sizeof(struct _wslua_dir));
dir->dir = OPENDIR_OP(dirname_clean);
g_free(dirname_clean);
dir->ext = extension ? g_strdup(extension) : NULL;
dir->dummy = g_malloc(sizeof(GError *));
*(dir->dummy) = NULL;
if (dir->dir == NULL) {
g_free(dir->dummy);
g_free(dir);
WSLUA_ARG_ERROR(Dir_open,PATHNAME,"could not open directory");
return 0;
}
pushDir(L,dir);
WSLUA_RETURN(1); /* the Dir object */
}
WSLUA_METAMETHOD Dir__call(lua_State* L) {
/* At every invocation will return one file (nil when done) */
Dir dir = checkDir(L,1);
const FILE_T* file;
const gchar* filename;
const char* ext;
if (!dir) {
luaL_argerror(L,1,"must be a Dir");
return 0;
}
if (!dir->dir) {
return 0;
}
if ( ! ( file = DIRGETNEXT_OP(dir->dir ) )) {
CLOSEDIR_OP(dir->dir);
dir->dir = NULL;
return 0;
}
if ( ! dir->ext ) {
filename = GETFNAME_OP(file);
lua_pushstring(L,filename);
return 1;
}
do {
filename = GETFNAME_OP(file);
/* XXX strstr returns ptr to first match,
this fails ext=".xxx" filename="aaa.xxxz.xxx" */
if ( ( ext = strstr(filename,dir->ext)) && g_str_equal(ext,dir->ext) ) {
lua_pushstring(L,filename);
return 1;
}
} while(( file = DIRGETNEXT_OP(dir->dir) ));
CLOSEDIR_OP(dir->dir);
dir->dir = NULL;
return 0;
}
WSLUA_METHOD Dir_close(lua_State* L) {
/* Closes the directory */
Dir dir = checkDir(L,1);
if (dir->dir) {
CLOSEDIR_OP(dir->dir);
dir->dir = NULL;
}
return 0;
}
static int wslua_Dir__gc(lua_State* L) {
Dir dir = checkDir(L,1);
if (dir->dir) {
CLOSEDIR_OP(dir->dir);
}
g_free(dir->dummy);
if (dir->ext) g_free(dir->ext);
g_free(dir);
return 0;
}
static const luaL_reg Dir_methods[] = {
{"open", Dir_open},
{"close", Dir_close},
{ NULL, NULL }
};
static const luaL_reg Dir_meta[] = {
{"__call", Dir__call},
{"__gc", wslua_Dir__gc},
{ NULL, NULL }
};
int Dir_register(lua_State* L) {
WSLUA_REGISTER_CLASS(Dir);
return 1;
}
typedef struct _statcmd_t {
lua_State* L;
int func_ref;
} statcmd_t;
static int statcmd_init_cb_error_handler(lua_State* L) {
(void)L;
return 0;
}
static void statcmd_init(const char *optarg, void* userdata) {
statcmd_t* sc = userdata;
lua_State* L = sc->L;
lua_settop(L,0);
lua_pushcfunction(L,statcmd_init_cb_error_handler);
lua_rawgeti(L, LUA_REGISTRYINDEX, sc->func_ref);
lua_pushstring(L,optarg);
switch ( lua_pcall(L,1,0,1) ) {
case 0:
break;
case LUA_ERRRUN:
g_warning("Runtime error while calling statcmd callback");
break;
case LUA_ERRMEM:
g_warning("Memory alloc error while calling statcmd callback");
break;
default:
g_assert_not_reached();
break;
}
}
WSLUA_FUNCTION wslua_register_stat_cmd_arg(lua_State* L) {
/* Register a function to handle a -z option */
#define WSLUA_ARG_register_stat_cmd_arg_ARGUMENT 1 /* Argument */
#define WSLUA_OPTARG_register_stat_cmd_arg_ACTION 2 /* Action */
const char* arg = luaL_checkstring(L,WSLUA_ARG_register_stat_cmd_arg_ARGUMENT);
statcmd_t* sc = g_malloc0(sizeof(statcmd_t)); /* XXX leaked */
sc->L = L;
lua_pushvalue(L, WSLUA_OPTARG_register_stat_cmd_arg_ACTION);
sc->func_ref = luaL_ref(L, LUA_REGISTRYINDEX);
lua_remove(L,1);
register_stat_cmd_arg(arg, statcmd_init, sc);
return 0;
}
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