forked from osmocom/wireshark
129 lines
3.3 KiB
C
129 lines
3.3 KiB
C
/* packet-echo.c
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* Routines for ECHO packet disassembly (RFC862)
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*
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* Only useful to mark the packets as ECHO in the summary and in the
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* protocol hierarchy statistics (since not so many fields to decode ;-)
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*
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* Laurent Deniel <laurent.deniel@free.fr>
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*
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* $Id: packet-echo.c,v 1.1 2003/06/25 13:42:18 deniel Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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#define ECHO_PORT 7
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static int proto_echo = -1;
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static int hf_echo_data = -1;
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static int hf_echo_request = -1;
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static int hf_echo_response = -1;
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static gint ett_echo = -1;
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static void dissect_echo(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_tree *echo_tree = NULL;
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proto_item *ti;
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int offset = 0;
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gboolean request = FALSE;
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const char *data = tvb_get_ptr(tvb, offset, -1);
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if (pinfo->destport == ECHO_PORT) {
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request = TRUE;
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}
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if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
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col_add_str(pinfo->cinfo, COL_PROTOCOL, "ECHO");
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}
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_add_fstr(pinfo->cinfo, COL_INFO, "%s",
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(request) ? "Request" : "Response");
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}
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if (tree) {
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ti = proto_tree_add_item(tree, proto_echo, tvb, offset, -1, FALSE);
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echo_tree = proto_item_add_subtree(ti, ett_echo);
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if (request) {
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proto_tree_add_boolean_hidden(echo_tree, hf_echo_request, tvb, 0, 0, 1);
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} else {
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proto_tree_add_boolean_hidden(echo_tree, hf_echo_response, tvb, 0, 0, 1);
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}
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proto_tree_add_bytes(echo_tree, hf_echo_data, tvb, offset, -1, data);
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}
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} /* dissect_echo */
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void proto_register_echo(void)
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{
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static hf_register_info hf[] = {
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{ &hf_echo_data,
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{ "Echo data", "echo.data",
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FT_BYTES, BASE_HEX, NULL, 0x0,
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"Echo data", HFILL }},
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{ &hf_echo_request,
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{ "Echo request", "echo.request",
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FT_BOOLEAN, BASE_NONE, NULL, 0x0,
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"Echo data", HFILL }},
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{ &hf_echo_response,
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{ "Echo response","echo.response",
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FT_BOOLEAN, BASE_NONE, NULL, 0x0,
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"Echo data", HFILL }}
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};
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static gint *ett[] = {
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&ett_echo
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};
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proto_echo = proto_register_protocol("Echo", "ECHO", "echo");
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proto_register_field_array(proto_echo, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void proto_reg_handoff_echo(void)
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{
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dissector_handle_t echo_handle = NULL;
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echo_handle = create_dissector_handle(dissect_echo, proto_echo);
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dissector_add("udp.port", ECHO_PORT, echo_handle);
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dissector_add("tcp.port", ECHO_PORT, echo_handle);
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}
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