forked from osmocom/wireshark
![AndersBroman](/assets/img/avatar_default.png)
Change-Id: Idfd3bed012e823de544fe4de483c8f095fc7c65d Reviewed-on: https://code.wireshark.org/review/8086 Reviewed-by: Anders Broman <a.broman58@gmail.com>
179 lines
4.9 KiB
C
179 lines
4.9 KiB
C
/* packet-data.c
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* Routines for raw data (default case)
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* Gilbert Ramirez <gram@alumni.rice.edu>
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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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#define NEW_PROTO_TREE_API
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/prefs.h>
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#include <epan/to_str.h>
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#include <wsutil/md5.h>
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/* proto_data cannot be static because it's referenced in the
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* print routines
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*/
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void proto_register_data(void);
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int proto_data = -1;
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#define DATA_HFI_INIT HFI_INIT(proto_data)
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static header_field_info hfi_data_data DATA_HFI_INIT =
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{ "Data", "data.data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL };
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static header_field_info hfi_data_text DATA_HFI_INIT =
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{ "Text", "data.text", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL };
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static header_field_info hfi_data_len DATA_HFI_INIT =
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{ "Length", "data.len", FT_INT32, BASE_DEC, NULL, 0x0, NULL, HFILL };
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static header_field_info hfi_data_md5_hash DATA_HFI_INIT =
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{ "Payload MD5 hash", "data.md5_hash", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL };
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static gboolean new_pane = FALSE;
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static gboolean show_as_text = FALSE;
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static gboolean generate_md5_hash = FALSE;
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static gint ett_data = -1;
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static void
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dissect_data(tvbuff_t *tvb, packet_info *pinfo _U_ , proto_tree *tree)
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{
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gint bytes;
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if (tree) {
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bytes = tvb_captured_length(tvb);
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if (bytes > 0) {
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tvbuff_t *data_tvb;
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proto_item *ti;
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proto_tree *data_tree;
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if (new_pane) {
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guint8 *real_data = (guint8 *)tvb_memdup(NULL, tvb, 0, bytes);
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data_tvb = tvb_new_child_real_data(tvb,real_data,bytes,bytes);
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tvb_set_free_cb(data_tvb, g_free);
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add_new_data_source(pinfo, data_tvb, "Not dissected data bytes");
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} else {
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data_tvb = tvb;
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}
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ti = proto_tree_add_protocol_format(tree, proto_data, tvb,
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0,
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bytes, "Data (%d byte%s)", bytes,
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plurality(bytes, "", "s"));
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data_tree = proto_item_add_subtree(ti, ett_data);
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proto_tree_add_item(data_tree, &hfi_data_data, data_tvb, 0, bytes, ENC_NA);
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if (show_as_text) {
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proto_tree_add_item(data_tree, &hfi_data_text, data_tvb, 0, bytes, ENC_ASCII|ENC_NA);
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}
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if(generate_md5_hash) {
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const guint8 *cp;
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md5_state_t md_ctx;
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md5_byte_t digest[16];
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const gchar *digest_string;
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cp = tvb_get_ptr(tvb, 0, bytes);
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md5_init(&md_ctx);
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md5_append(&md_ctx, cp, bytes);
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md5_finish(&md_ctx, digest);
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digest_string = bytestring_to_str(wmem_packet_scope(), digest, 16, '\0');
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ti = proto_tree_add_string(data_tree, &hfi_data_md5_hash, tvb, 0, 0, digest_string);
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PROTO_ITEM_SET_GENERATED(ti);
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}
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ti = proto_tree_add_int(data_tree, &hfi_data_len, data_tvb, 0, 0, bytes);
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PROTO_ITEM_SET_GENERATED (ti);
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}
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}
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}
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void
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proto_register_data(void)
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{
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#ifndef HAVE_HFI_SECTION_INIT
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static header_field_info *hfi[] = {
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&hfi_data_data,
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&hfi_data_text,
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&hfi_data_md5_hash,
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&hfi_data_len,
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};
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#endif
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static gint *ett[] = {
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&ett_data
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};
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module_t *module_data;
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proto_data = proto_register_protocol (
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"Data", /* name */
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"Data", /* short name */
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"data" /* abbrev */
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);
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register_dissector("data", dissect_data, proto_data);
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proto_register_fields(proto_data, hfi, array_length(hfi));
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proto_register_subtree_array(ett, array_length(ett));
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module_data = prefs_register_protocol( proto_data, NULL);
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prefs_register_bool_preference(module_data,
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"datapref.newpane",
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"Show not dissected data on new Packet Bytes pane",
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"Show not dissected data on new Packet Bytes pane",
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&new_pane);
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prefs_register_bool_preference(module_data,
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"show_as_text",
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"Show data as text",
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"Show data as text in the Packet Details pane",
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&show_as_text);
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prefs_register_bool_preference(module_data,
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"md5_hash",
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"Generate MD5 hash",
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"Whether or not MD5 hashes should be generated and shown for each payload.",
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&generate_md5_hash);
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/*
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* "Data" is used to dissect something whose normal dissector
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* is disabled, so it cannot itself be disabled.
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*/
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proto_set_cant_toggle(proto_data);
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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