forked from osmocom/wireshark
134 lines
3.6 KiB
C
134 lines
3.6 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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* 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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#include "config.h"
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#include <epan/packet.h>
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#define ECHO_PORT 7
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void proto_register_echo(void);
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void proto_reg_handoff_echo(void);
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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 int dissect_echo(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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int offset = 0;
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gboolean request = FALSE;
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if (pinfo->destport == ECHO_PORT) {
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request = TRUE;
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}
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "ECHO");
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col_set_str(pinfo->cinfo, COL_INFO,
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(request) ? "Request" : "Response");
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if (tree) {
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proto_tree *echo_tree;
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proto_item *ti, *hidden_item;
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ti = proto_tree_add_item(tree, proto_echo, tvb, offset, -1, ENC_NA);
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echo_tree = proto_item_add_subtree(ti, ett_echo);
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if (request) {
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hidden_item = proto_tree_add_boolean(echo_tree, hf_echo_request, tvb, 0, 0, 1);
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} else {
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hidden_item = proto_tree_add_boolean(echo_tree, hf_echo_response, tvb, 0, 0, 1);
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}
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PROTO_ITEM_SET_HIDDEN(hidden_item);
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proto_tree_add_item(echo_tree, hf_echo_data, tvb, offset, -1, ENC_NA);
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}
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return tvb_captured_length(tvb);
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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_NONE, NULL, 0x0,
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NULL, 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;
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echo_handle = create_dissector_handle(dissect_echo, proto_echo);
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dissector_add_uint_with_preference("udp.port", ECHO_PORT, echo_handle);
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dissector_add_uint_with_preference("tcp.port", ECHO_PORT, echo_handle);
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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: 2
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* ex: set shiftwidth=2 tabstop=8 expandtab:
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* :indentSize=2:tabSize=8:noTabs=true:
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*/
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