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/*
* $Id: ftype-tvbuff.c,v 1.12 2003/10/29 23:48:14 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 2001 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
#include <ftypes-int.h>
#include <string.h>
#include <epan/gdebug.h>
#define tvb_is_private fvalue_gboolean1
static void
value_new(fvalue_t *fv)
{
fv->value.tvb = NULL;
fv->tvb_is_private = FALSE;
}
static void
value_free(fvalue_t *fv)
{
if (fv->value.tvb && fv->tvb_is_private) {
tvb_free_chain(fv->value.tvb);
}
}
static void
value_set(fvalue_t *fv, gpointer value, gboolean already_copied)
{
g_assert(already_copied);
/* Free up the old value, if we have one */
value_free(fv);
fv->value.tvb = value;
}
static void
free_tvb_data(void *data)
{
g_free(data);
}
static gboolean
val_from_string(fvalue_t *fv, char *s, LogFunc logfunc _U_)
{
tvbuff_t *new_tvb;
guint8 *private_data;
/* Free up the old value, if we have one */
value_free(fv);
/* Make a tvbuff from the string. We can drop the
* terminating NUL. */
private_data = g_memdup(s, strlen(s));
new_tvb = tvb_new_real_data(private_data,
strlen(s), strlen(s));
/* Let the tvbuff know how to delete the data. */
tvb_set_free_cb(new_tvb, free_tvb_data);
/* And let us know that we need to free the tvbuff */
fv->tvb_is_private = TRUE;
fv->value.tvb = new_tvb;
return TRUE;
}
static gboolean
val_from_unparsed(fvalue_t *fv, char *s, gboolean allow_partial_value _U_, LogFunc logfunc)
{
fvalue_t *fv_bytes;
tvbuff_t *new_tvb;
guint8 *private_data;
/* Free up the old value, if we have one */
value_free(fv);
/* Does this look like a byte string? */
fv_bytes = fvalue_from_unparsed(FT_BYTES, s, TRUE, NULL);
if (fv_bytes) {
/* Make a tvbuff from the bytes */
private_data = g_memdup(fv_bytes->value.bytes->data,
fv_bytes->value.bytes->len);
new_tvb = tvb_new_real_data(private_data,
fv_bytes->value.bytes->len,
fv_bytes->value.bytes->len);
/* Let the tvbuff know how to delete the data. */
tvb_set_free_cb(new_tvb, free_tvb_data);
/* And let us know that we need to free the tvbuff */
fv->tvb_is_private = TRUE;
fv->value.tvb = new_tvb;
return TRUE;
}
else {
/* Treat it as a string. */
return val_from_string(fv, s, logfunc);
}
g_assert_not_reached();
}
static gpointer
value_get(fvalue_t *fv)
{
return fv->value.tvb;
}
static guint
len(fvalue_t *fv)
{
if (fv->value.tvb)
return tvb_length(fv->value.tvb);
else
return 0;
}
static void
slice(fvalue_t *fv, GByteArray *bytes, guint offset, guint length)
{
const guint8* data;
if (fv->value.tvb) {
TRY {
data = tvb_get_ptr(fv->value.tvb, offset, length);
g_byte_array_append(bytes, data, length);
}
CATCH_ALL {
/* nothing */
}
ENDTRY;
}
}
static gboolean
cmp_contains(fvalue_t *fv_a, fvalue_t *fv_b)
{
if (tvb_find_tvb(fv_a->value.tvb, fv_b->value.tvb, 0) > -1) {
return TRUE;
}
else {
return FALSE;
}
}
void
ftype_register_tvbuff(void)
{
static ftype_t protocol_type = {
"FT_PROTOCOL", /* name */
"protocol", /* pretty_name */
0, /* wire_size */
value_new, /* new_value */
value_free, /* free_value */
val_from_unparsed, /* val_from_unparsed */
val_from_string, /* val_from_string */
NULL, /* val_to_string_repr */
NULL, /* len_string_repr */
value_set,
NULL,
NULL,
value_get,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
cmp_contains, /* cmp_contains */
len,
slice,
};
ftype_register(FT_PROTOCOL, &protocol_type);
}
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