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/* packet-data.c
* Routines for raw data (default case)
* Gilbert Ramirez <gram@alumni.rice.edu>
*
* $Id$
*
* 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glib.h>
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/crypt/crypt-md5.h>
#include "packet-data.h"
/* proto_data cannot be static because it's referenced in the
* print routines
*/
int proto_data = -1;
static int hf_data_data = -1;
static int hf_data_text = -1;
static int hf_data_len = -1;
static int hf_data_md5_hash = -1;
static gboolean new_pane = FALSE;
static gboolean show_as_text = FALSE;
static gboolean generate_md5_hash = FALSE;
static gint ett_data = -1;
void proto_reg_handoff_data(void);
static void
dissect_data(tvbuff_t *tvb, packet_info *pinfo _U_ , proto_tree *tree)
{
gint bytes;
if (tree) {
bytes = tvb_length_remaining(tvb, 0);
if (bytes > 0) {
tvbuff_t *data_tvb;
proto_item *ti;
proto_tree *data_tree;
if (new_pane) {
guint8 *real_data = tvb_memdup(tvb, 0, bytes);
data_tvb = tvb_new_child_real_data(tvb,real_data,bytes,bytes);
tvb_set_free_cb(data_tvb, g_free);
add_new_data_source(pinfo, data_tvb, "Not dissected data bytes");
} else {
data_tvb = tvb;
}
ti = proto_tree_add_protocol_format(tree, proto_data, tvb,
0,
bytes, "Data (%d byte%s)", bytes,
plurality(bytes, "", "s"));
data_tree = proto_item_add_subtree(ti, ett_data);
proto_tree_add_item(data_tree, hf_data_data, data_tvb, 0, bytes, FALSE);
if (show_as_text) {
proto_tree_add_item(data_tree, hf_data_text, data_tvb, 0, bytes, FALSE);
}
if(generate_md5_hash) {
const guint8 *cp;
md5_state_t md_ctx;
md5_byte_t digest[16];
gchar *digest_string;
cp = tvb_get_ptr(tvb, 0, bytes);
md5_init(&md_ctx);
md5_append(&md_ctx, cp, bytes);
md5_finish(&md_ctx, digest);
digest_string = bytestring_to_str(digest, 16, '\0');
ti = proto_tree_add_string(data_tree, hf_data_md5_hash, tvb, 0, 0, digest_string);
PROTO_ITEM_SET_GENERATED(ti);
}
ti = proto_tree_add_int(data_tree, hf_data_len, data_tvb, 0, 0, bytes);
PROTO_ITEM_SET_GENERATED (ti);
}
}
}
void
proto_register_data(void)
{
static hf_register_info hf[] = {
{ &hf_data_data,
{ "Data", "data.data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_data_text,
{ "Text", "data.text", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_data_md5_hash,
{ "Payload MD5 hash", "data.md5_hash", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_data_len,
{ "Length", "data.len", FT_INT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }
};
static gint *ett[] = {
&ett_data
};
module_t *module_data;
proto_data = proto_register_protocol (
"Data", /* name */
"Data", /* short name */
"data" /* abbrev */
);
register_dissector("data", dissect_data, proto_data);
proto_register_field_array(proto_data, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
module_data = prefs_register_protocol( proto_data, proto_reg_handoff_data);
prefs_register_bool_preference(module_data,
"datapref.newpane",
"Show not dissected data on new Packet Bytes pane",
"Show not dissected data on new Packet Bytes pane",
&new_pane);
prefs_register_bool_preference(module_data,
"show_as_text",
"Show data as text",
"Show data as text in the Packet Details pane",
&show_as_text);
prefs_register_bool_preference(module_data,
"md5_hash",
"Generate MD5 hash",
"Whether or not MD5 hashes should be generated and shown for each payload.",
&generate_md5_hash);
/*
* "Data" is used to dissect something whose normal dissector
* is disabled, so it cannot itself be disabled.
*/
proto_set_cant_toggle(proto_data);
}
void
proto_reg_handoff_data(void)
{
}
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