forked from osmocom/wireshark
![Martin Kaiser](/assets/img/avatar_default.png)
return an error if the parameter is _no_ string Bug: 10401 Change-Id: I5643ef05009072538155e63c3178071ed6bab061 Reviewed-on: https://code.wireshark.org/review/4071 Reviewed-by: Martin Kaiser <wireshark@kaiser.cx> Tested-by: Martin Kaiser <wireshark@kaiser.cx>
237 lines
6.2 KiB
C
237 lines
6.2 KiB
C
/*
|
|
* Wireshark - Network traffic analyzer
|
|
*
|
|
* Copyright 2006 Gilbert Ramirez <gram@alumni.rice.edu>
|
|
*
|
|
* 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"
|
|
|
|
#include <glib.h>
|
|
|
|
#include "dfunctions.h"
|
|
#include "dfilter-int.h"
|
|
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
|
|
#include <ftypes/ftypes-int.h>
|
|
#include <ftypes/ftypes.h>
|
|
#include <epan/exceptions.h>
|
|
#include <epan/emem.h>
|
|
|
|
/* lowercase an ASCII character.
|
|
* (thanks to Guy Harris for the function) */
|
|
static gchar
|
|
string_ascii_to_lower(gchar c)
|
|
{
|
|
return ((c & 0x80) ? c : tolower(c));
|
|
}
|
|
|
|
/* uppercase an ASCII character. */
|
|
static gchar
|
|
string_ascii_to_upper(gchar c)
|
|
{
|
|
return ((c & 0x80) ? c : toupper(c));
|
|
}
|
|
|
|
|
|
/* Convert an FT_STRING using a callback function */
|
|
static gboolean
|
|
string_walk(GList* arg1list, GList **retval, gchar(*conv_func)(gchar))
|
|
{
|
|
GList *arg1;
|
|
fvalue_t *arg_fvalue;
|
|
fvalue_t *new_ft_string;
|
|
char *s, *c;
|
|
|
|
arg1 = arg1list;
|
|
while (arg1) {
|
|
arg_fvalue = (fvalue_t *)arg1->data;
|
|
/* XXX - it would be nice to handle FT_TVBUFF, too */
|
|
if (IS_FT_STRING(fvalue_type_ftenum(arg_fvalue))) {
|
|
s = (char *)ep_strdup((gchar *)fvalue_get(arg_fvalue));
|
|
for (c = s; *c; c++) {
|
|
/**c = string_ascii_to_lower(*c);*/
|
|
*c = conv_func(*c);
|
|
}
|
|
|
|
new_ft_string = fvalue_new(FT_STRING);
|
|
fvalue_set_string(new_ft_string, s);
|
|
*retval = g_list_append(*retval, new_ft_string);
|
|
}
|
|
arg1 = arg1->next;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* dfilter function: lower() */
|
|
static gboolean
|
|
df_func_lower(GList* arg1list, GList *arg2junk _U_, GList **retval)
|
|
{
|
|
return string_walk(arg1list, retval, string_ascii_to_lower);
|
|
}
|
|
|
|
/* dfilter function: upper() */
|
|
static gboolean
|
|
df_func_upper(GList* arg1list, GList *arg2junk _U_, GList **retval)
|
|
{
|
|
return string_walk(arg1list, retval, string_ascii_to_upper);
|
|
}
|
|
|
|
/* dfilter function: len() */
|
|
static gboolean
|
|
df_func_len(GList* arg1list, GList *arg2junk _U_, GList **retval)
|
|
{
|
|
GList *arg1;
|
|
fvalue_t *arg_fvalue;
|
|
fvalue_t *ft_len;
|
|
|
|
arg1 = arg1list;
|
|
while (arg1) {
|
|
arg_fvalue = (fvalue_t *)arg1->data;
|
|
/* XXX - it would be nice to handle other types */
|
|
if (IS_FT_STRING(fvalue_type_ftenum(arg_fvalue))) {
|
|
ft_len = fvalue_new(FT_UINT32);
|
|
fvalue_set_uinteger(ft_len, (guint) strlen((char *)fvalue_get(arg_fvalue)));
|
|
*retval = g_list_append(*retval, ft_len);
|
|
}
|
|
arg1 = arg1->next;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* dfilter function: size() */
|
|
static gboolean
|
|
df_func_size(GList* arg1list, GList *arg2junk _U_, GList **retval)
|
|
{
|
|
GList *arg1;
|
|
fvalue_t *arg_fvalue;
|
|
fvalue_t *ft_len;
|
|
|
|
arg1 = arg1list;
|
|
while (arg1) {
|
|
arg_fvalue = (fvalue_t *)arg1->data;
|
|
|
|
ft_len = fvalue_new(FT_UINT32);
|
|
fvalue_set_uinteger(ft_len, fvalue_length(arg_fvalue));
|
|
*retval = g_list_append(*retval, ft_len);
|
|
|
|
arg1 = arg1->next;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* dfilter function: count() */
|
|
static gboolean
|
|
df_func_count(GList* arg1list, GList *arg2junk _U_, GList **retval)
|
|
{
|
|
fvalue_t *ft_ret;
|
|
guint32 num_items;
|
|
|
|
num_items = (guint32)g_list_length(arg1list);
|
|
|
|
ft_ret = fvalue_new(FT_UINT32);
|
|
fvalue_set_uinteger(ft_ret, num_items);
|
|
*retval = g_list_append(*retval, ft_ret);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* For upper(), lower() and len(), checks that the parameter passed to
|
|
* it is an FT_STRING */
|
|
static void
|
|
ul_semcheck_params(int param_num, stnode_t *st_node)
|
|
{
|
|
sttype_id_t type;
|
|
ftenum_t ftype;
|
|
header_field_info *hfinfo;
|
|
|
|
type = stnode_type_id(st_node);
|
|
|
|
if (param_num == 0) {
|
|
switch(type) {
|
|
case STTYPE_FIELD:
|
|
hfinfo = (header_field_info *)stnode_data(st_node);
|
|
ftype = hfinfo->type;
|
|
if (!IS_FT_STRING(ftype)) {
|
|
dfilter_fail("Only strings can be used in upper() or lower() or len()");
|
|
THROW(TypeError);
|
|
}
|
|
break;
|
|
default:
|
|
dfilter_fail("Only string-type fields can be used in upper() or lower() or len()");
|
|
THROW(TypeError);
|
|
}
|
|
}
|
|
else {
|
|
g_assert_not_reached();
|
|
}
|
|
}
|
|
|
|
static void
|
|
ul_semcheck_field_param(int param_num, stnode_t *st_node)
|
|
{
|
|
sttype_id_t type;
|
|
|
|
type = stnode_type_id(st_node);
|
|
|
|
if (param_num == 0) {
|
|
switch(type) {
|
|
case STTYPE_FIELD:
|
|
break;
|
|
default:
|
|
dfilter_fail("Only type fields can be used as parameter "
|
|
"for size() or count()");
|
|
THROW(TypeError);
|
|
}
|
|
}
|
|
else {
|
|
g_assert_not_reached();
|
|
}
|
|
}
|
|
|
|
/* The table of all display-filter functions */
|
|
static df_func_def_t
|
|
df_functions[] = {
|
|
{ "lower", df_func_lower, FT_STRING, 1, 1, ul_semcheck_params },
|
|
{ "upper", df_func_upper, FT_STRING, 1, 1, ul_semcheck_params },
|
|
{ "len", df_func_len, FT_UINT32, 1, 1, ul_semcheck_params },
|
|
{ "size", df_func_size, FT_UINT32, 1, 1, ul_semcheck_field_param },
|
|
{ "count", df_func_count, FT_UINT32, 1, 1, ul_semcheck_field_param },
|
|
{ NULL, NULL, FT_NONE, 0, 0, NULL }
|
|
};
|
|
|
|
/* Lookup a display filter function record by name */
|
|
df_func_def_t*
|
|
df_func_lookup(char *name)
|
|
{
|
|
df_func_def_t *func_def;
|
|
|
|
func_def = df_functions;
|
|
while (func_def->function != NULL) {
|
|
if (strcmp(func_def->name, name) == 0) {
|
|
return func_def;
|
|
}
|
|
func_def++;
|
|
}
|
|
return NULL;
|
|
}
|