2010-08-27 17:18:28 +00:00
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/* packet-esio.c
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* Routines for Ether-S-I/O dissection (from Saia Burgess Controls AG )
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* Copyright 2010, Christian Durrer <christian.durrer@sensemail.ch>
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*
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* $Id$
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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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2012-06-28 23:18:38 +00:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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2010-08-27 17:18:28 +00:00
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*/
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#include "config.h"
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/expert.h>
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/* Telegram types*/
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#define ESIO_TRANSFER 0x01
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#define ESIO_STATUS 0x02
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2013-03-17 09:11:21 +00:00
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void proto_register_esio(void);
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void proto_reg_handoff_esio(void);
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2010-08-27 17:18:28 +00:00
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/* Initialize the protocol and registered fields */
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static int proto_esio = -1;
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static int hf_esio_type = -1;
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static int hf_esio_version = -1;
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static int hf_esio_length = -1;
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static int hf_esio_transaction_id = -1;
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static int hf_esio_tlg_id = -1;
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static int hf_esio_src_stn_id = -1;
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static int hf_esio_data_nbr = -1;
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static int hf_esio_data_flags = -1;
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static int hf_esio_data_transfer_id = -1;
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static int hf_esio_data_dest_id = -1;
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static int hf_esio_data_length = -1;
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static int hf_esio_data = -1;
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static int hf_esio_sts_type = -1;
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static int hf_esio_sts_size = -1;
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static int hf_esio_rio_sts = -1;
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static int hf_esio_rio_tlgs_lost = -1;
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static int hf_esio_rio_diag = -1;
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static int hf_esio_rio_flags = -1;
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/* Initialize the subtree pointers */
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static gint ett_esio = -1;
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static gint ett_esio_header = -1;
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static gint ett_esio_transfer_header = -1;
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static gint ett_esio_transfer_data = -1;
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static gint ett_esio_data = -1;
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2013-05-25 17:06:40 +00:00
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static expert_field ei_esio_telegram_lost = EI_INIT;
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2010-08-27 17:18:28 +00:00
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/* value to string definitions*/
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/* Ether-S-I/O telegram types*/
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static const value_string esio_tlg_types[] = {
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{0, "Reserved"},
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{1, "Data transfer telegram"},
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{2, "Status/Diag telegram"},
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{0, NULL}
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};
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/* Status telegram types*/
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static const value_string esio_sts_types[] = {
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{0, "None"},
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{1, "RIO status"},
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{0, NULL}
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};
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/* check whether the packet looks like SBUS or not */
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static gboolean
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is_esio_pdu(tvbuff_t *tvb)
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{
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2011-10-21 02:10:19 +00:00
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/* we need at least 8 bytes to determine whether this is
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2010-08-28 19:50:00 +00:00
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Ether-S-I/O or not*/
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/* minimal length is 20 bytes*/
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if (tvb_length(tvb) < 20) {
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return FALSE;
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}
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/* First four bytes must be "ESIO"*/
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if (tvb_strneql(tvb, 0, "ESIO", 4) != 0) {
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return FALSE;
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}
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/* fifth byte must be 0*/
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if (tvb_get_guint8(tvb, 4) > 0x00) {
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return FALSE;
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}
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/* sixth byte indicates telegram type and must be 0, 1 or 2*/
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if (tvb_get_guint8(tvb, 5) > 0x02) {
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return FALSE;
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}
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/* seventh byte must be 0*/
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if (tvb_get_guint8(tvb, 6) > 0x00) {
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return FALSE;
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}
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/* eight byte indicates telegram version and must be 0 (up to now)*/
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if (tvb_get_guint8(tvb, 7) > 0x00) {
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return FALSE;
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}
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/*header seems to be Ether-S-I/O*/
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return TRUE;
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2010-08-27 17:18:28 +00:00
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}
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/*Dissect the telegram*/
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static int
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2012-09-10 21:40:21 +00:00
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dissect_esio(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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2010-08-27 17:18:28 +00:00
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{
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/* Set up structures needed to add the protocol subtree and manage it */
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2012-07-12 20:08:34 +00:00
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proto_item *ti, *et;
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2010-08-28 19:50:00 +00:00
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proto_tree *esio_tree, *esio_header_tree, *esio_transfer_header_tree,
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2012-07-12 20:08:34 +00:00
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*esio_data_tansfer_tree, *esio_data_tree;
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2010-08-27 17:18:28 +00:00
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2012-07-12 20:08:34 +00:00
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gint i;
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gint offset;
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guint8 esio_nbr_data_transfers;
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guint16 esio_telegram_type;
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guint16 esio_tlg_type;
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guint16 esio_transfer_length;
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guint32 esio_transfer_dest_id;
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guint32 esio_src_id;
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guint32 esio_dst_id;
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2010-08-27 17:18:28 +00:00
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/* does this look like an sbus pdu? */
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2010-08-28 19:50:00 +00:00
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if (!is_esio_pdu(tvb)) {
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return 0;
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2010-08-27 17:18:28 +00:00
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}
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/* Make entries in Protocol column and Info column on summary display */
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "ESIO");
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col_clear(pinfo->cinfo, COL_INFO);
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esio_telegram_type = tvb_get_guint8(tvb,5);
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2013-10-13 19:56:52 +00:00
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2013-06-14 01:02:11 +00:00
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switch (esio_telegram_type) {
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case ESIO_TRANSFER:
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esio_src_id = tvb_get_ntohl(tvb,16);
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esio_nbr_data_transfers = tvb_get_guint8(tvb, 20);
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esio_dst_id = tvb_get_ntohl(tvb,26);
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col_add_fstr( pinfo->cinfo, COL_INFO,
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"Data transfer: Src ID: %d, Dst ID(s): %d",
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esio_src_id, esio_dst_id);
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if (esio_nbr_data_transfers > 1) {
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2013-10-29 14:09:20 +00:00
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col_append_str( pinfo->cinfo, COL_INFO,
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2013-06-14 01:02:11 +00:00
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" ...");
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}
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break;
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case ESIO_STATUS:
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esio_src_id = tvb_get_ntohl(tvb,16);
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col_add_fstr( pinfo->cinfo, COL_INFO,
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"Status/diag telegram: Src ID: %d",
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esio_src_id);
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break;
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default:
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/* All other telegrams */
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col_set_str( pinfo->cinfo, COL_INFO,
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"Unknown telegram");
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break;
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2010-08-27 17:18:28 +00:00
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}
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2013-06-14 01:02:11 +00:00
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2010-08-27 17:18:28 +00:00
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/* create display subtree for the protocol */
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2012-07-12 20:08:34 +00:00
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offset = 0;
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ti = proto_tree_add_item(tree, proto_esio, tvb, offset, -1, ENC_NA);
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esio_tree = proto_item_add_subtree(ti, ett_esio);
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2010-08-27 17:18:28 +00:00
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/*Add subtree for Ether-S-I/O header*/
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2012-07-12 20:08:34 +00:00
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et = proto_tree_add_text(esio_tree, tvb, offset, 12, "Ether-S-I/O header");
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esio_header_tree = proto_item_add_subtree(et, ett_esio_header);
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offset += 4; /*first four bytes are "ESIO"*/
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2010-08-27 17:18:28 +00:00
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/* add items to the Ether-S-I/O header subtree*/
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2012-07-12 20:08:34 +00:00
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esio_tlg_type = tvb_get_ntohs(tvb,offset);
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proto_tree_add_item(esio_header_tree,
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hf_esio_type, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(esio_header_tree,
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hf_esio_version, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(esio_header_tree,
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hf_esio_length, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(esio_header_tree,
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hf_esio_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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switch (esio_tlg_type) {
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case ESIO_TRANSFER:
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if (tree) {
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/*Add subtree for Ether-S-I/O header*/
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et = proto_tree_add_text(esio_tree, tvb, offset, 12, "Transfer header");
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esio_transfer_header_tree = proto_item_add_subtree(et, ett_esio_transfer_header);
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proto_tree_add_item(esio_transfer_header_tree,
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hf_esio_tlg_id, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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proto_tree_add_item(esio_transfer_header_tree,
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hf_esio_src_stn_id, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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esio_nbr_data_transfers = tvb_get_guint8(tvb,offset);
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proto_tree_add_item(esio_transfer_header_tree,
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hf_esio_data_nbr, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_item(esio_transfer_header_tree,
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hf_esio_data_flags, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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for (i=((esio_nbr_data_transfers)); i>0; i--) {
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/*Add subtree(s) for Ether-S-I/O data transfers*/
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esio_transfer_dest_id = tvb_get_ntohl(tvb,(offset+4));
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esio_transfer_length = tvb_get_ntohs(tvb,(offset+8));
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et = proto_tree_add_text(esio_tree, tvb, offset,
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(esio_transfer_length + 10), "Data transfer to ID: %d ",
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esio_transfer_dest_id);
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esio_data_tansfer_tree = proto_item_add_subtree(et, ett_esio_transfer_data);
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proto_tree_add_item(esio_data_tansfer_tree,
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hf_esio_data_transfer_id, tvb, offset, 4, ENC_BIG_ENDIAN);
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2010-08-28 19:50:00 +00:00
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offset += 4;
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2012-07-12 20:08:34 +00:00
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proto_tree_add_item(esio_data_tansfer_tree,
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hf_esio_data_dest_id, tvb, offset, 4, ENC_BIG_ENDIAN);
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2010-08-28 19:50:00 +00:00
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offset += 4;
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2012-07-12 20:08:34 +00:00
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proto_tree_add_item(esio_data_tansfer_tree,
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hf_esio_data_length, tvb, offset, 2, ENC_BIG_ENDIAN);
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2010-08-28 19:50:00 +00:00
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offset += 2;
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2012-07-12 20:08:34 +00:00
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/*here comes the data*/
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et = proto_tree_add_text(esio_data_tansfer_tree, tvb, offset,
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esio_transfer_length, "Data bytes ");
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esio_data_tree = proto_item_add_subtree(et, ett_esio_data);
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for (i=((esio_transfer_length)); i>0; i--) {
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proto_tree_add_item(esio_data_tree,
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hf_esio_data, tvb, offset,
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1, ENC_BIG_ENDIAN);
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offset += 1;
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}
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}
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} /* if (tree) */
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break;
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case ESIO_STATUS: {
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proto_item *hi = NULL;
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if (tree) {
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proto_tree_add_item(esio_tree,
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hf_esio_sts_type, tvb, offset, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(esio_tree,
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hf_esio_sts_size, tvb, offset+2, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(esio_tree,
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hf_esio_src_stn_id, tvb, offset+4, 4, ENC_BIG_ENDIAN);
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proto_tree_add_item(esio_tree,
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hf_esio_rio_sts, tvb, offset+8,
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1, ENC_BIG_ENDIAN);
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hi = proto_tree_add_item(esio_tree,
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hf_esio_rio_tlgs_lost, tvb, offset+9,
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1, ENC_BIG_ENDIAN);
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proto_tree_add_item(esio_tree,
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hf_esio_rio_diag, tvb, offset+10,
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1, ENC_BIG_ENDIAN);
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proto_tree_add_item(esio_tree,
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hf_esio_rio_flags, tvb, offset+11, 1, ENC_BIG_ENDIAN);
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} /* if (tree) */
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if (tvb_get_guint8(tvb, offset + 9) > 0) {
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2013-05-25 17:06:40 +00:00
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expert_add_info(pinfo, hi, &ei_esio_telegram_lost);
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2010-08-28 19:50:00 +00:00
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}
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2012-07-12 20:08:34 +00:00
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break;
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}
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default:
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break;
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} /* switch() */
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2010-08-27 17:18:28 +00:00
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return tvb_length(tvb);
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/*End of dissect_sbus*/
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}
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/* Register the protocol with Wireshark */
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void
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proto_register_esio(void)
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{
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/* Setup list of header fields See Section 1.6.1 for details*/
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static hf_register_info hf[] = {
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{ &hf_esio_type,
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{ "Telegram type", "esio.type",
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FT_UINT16, BASE_HEX, VALS(esio_tlg_types), 0,
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NULL, HFILL }
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},
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{ &hf_esio_version,
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{ "Version", "esio.vers",
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FT_UINT16, BASE_DEC, NULL, 0,
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NULL, HFILL }
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},
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{ &hf_esio_length,
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{ "Length (bytes)", "esio.len",
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FT_UINT16, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }
|
|
|
|
},
|
|
|
|
|
|
|
|
{ &hf_esio_transaction_id,
|
|
|
|
{ "Transaction ID", "esio.transaction_id",
|
|
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }
|
|
|
|
},
|
|
|
|
|
|
|
|
{ &hf_esio_src_stn_id,
|
|
|
|
{ "Source station ID", "esio.src_stn_id",
|
|
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }
|
|
|
|
},
|
|
|
|
|
|
|
|
{ &hf_esio_tlg_id,
|
|
|
|
{ "Telegram ID", "esio.transfer.tlg_id",
|
|
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }
|
|
|
|
},
|
|
|
|
|
|
|
|
{ &hf_esio_data_nbr,
|
|
|
|
{ "Nbr. of data transfers", "esio.data.nbr",
|
|
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }
|
|
|
|
},
|
|
|
|
|
|
|
|
{ &hf_esio_data_flags,
|
|
|
|
{ "Transfer header flags", "esio.data.flags",
|
|
|
|
FT_UINT8, BASE_HEX, NULL, 0,
|
|
|
|
NULL, HFILL }
|
|
|
|
},
|
|
|
|
|
|
|
|
{ &hf_esio_data_transfer_id,
|
|
|
|
{ "Data transfer ID", "esio.data.transfer_id",
|
|
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }
|
|
|
|
},
|
|
|
|
|
|
|
|
{ &hf_esio_data_dest_id,
|
|
|
|
{ "Data destination ID", "esio.data.destination_id",
|
|
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }
|
|
|
|
},
|
|
|
|
|
|
|
|
{ &hf_esio_data_length,
|
|
|
|
{ "Data transfer length", "esio.data.length",
|
|
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }
|
|
|
|
},
|
|
|
|
|
|
|
|
{ &hf_esio_data,
|
|
|
|
{ "Data", "esio.data",
|
|
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }
|
|
|
|
},
|
|
|
|
|
|
|
|
{ &hf_esio_sts_type,
|
|
|
|
{ "Status type", "esio.sts.type",
|
|
|
|
FT_UINT16, BASE_HEX, VALS(esio_sts_types), 0,
|
|
|
|
NULL, HFILL }
|
|
|
|
},
|
|
|
|
|
|
|
|
{ &hf_esio_sts_size,
|
|
|
|
{ "Status length (bytes)", "esio.sts.length",
|
|
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }
|
|
|
|
},
|
|
|
|
|
|
|
|
{ &hf_esio_rio_sts,
|
|
|
|
{ "RIO status", "esio.sts.rio_sts",
|
|
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }
|
|
|
|
},
|
|
|
|
|
|
|
|
{ &hf_esio_rio_tlgs_lost,
|
|
|
|
{ "Lost telegrams to RIO", "esio.sts.rio_lost_tlg",
|
|
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }
|
|
|
|
},
|
|
|
|
|
|
|
|
{ &hf_esio_rio_diag,
|
|
|
|
{ "RIO diagnostics", "esio.sts.rio_diag",
|
|
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }
|
|
|
|
},
|
|
|
|
|
|
|
|
{ &hf_esio_rio_flags,
|
|
|
|
{ "RIO flags", "esio.sts.rio_flags",
|
|
|
|
FT_UINT8, BASE_HEX, NULL, 0,
|
|
|
|
NULL, HFILL }
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
/* Setup protocol subtree array */
|
|
|
|
static gint *ett[] = {
|
|
|
|
&ett_esio,
|
|
|
|
&ett_esio_header,
|
|
|
|
&ett_esio_transfer_header,
|
|
|
|
&ett_esio_transfer_data,
|
|
|
|
&ett_esio_data
|
|
|
|
};
|
|
|
|
|
2013-05-25 17:06:40 +00:00
|
|
|
static ei_register_info ei[] = {
|
|
|
|
{ &ei_esio_telegram_lost, { "esio.telegram_lost", PI_SEQUENCE, PI_NOTE, "Telegram(s) lost", EXPFILL }},
|
|
|
|
};
|
|
|
|
|
|
|
|
expert_module_t* expert_esio;
|
|
|
|
|
2010-08-27 17:18:28 +00:00
|
|
|
/* Register the protocol name and description */
|
|
|
|
proto_esio = proto_register_protocol("SAIA Ether-S-I/O protocol", "ESIO", "esio");
|
|
|
|
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
|
|
proto_register_field_array(proto_esio, hf, array_length(hf));
|
|
|
|
proto_register_subtree_array(ett, array_length(ett));
|
2013-05-25 17:06:40 +00:00
|
|
|
expert_esio = expert_register_protocol(proto_esio);
|
|
|
|
expert_register_field_array(expert_esio, ei, array_length(ei));
|
2010-08-27 17:18:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
proto_reg_handoff_esio(void)
|
|
|
|
{
|
|
|
|
dissector_handle_t esio_handle;
|
|
|
|
|
|
|
|
esio_handle = new_create_dissector_handle(dissect_esio, proto_esio);
|
2010-12-20 05:35:29 +00:00
|
|
|
dissector_add_uint("udp.port", 6060, esio_handle);
|
2010-08-27 17:18:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Editor modelines
|
|
|
|
*
|
|
|
|
* Local Variables:
|
|
|
|
* c-basic-offset: 7
|
|
|
|
* tab-width: 8
|
|
|
|
* indent-tabs-mode: nil
|
|
|
|
* End:
|
|
|
|
*
|
2011-09-21 17:49:11 +00:00
|
|
|
* ex: set shiftwidth=7 tabstop=8 expandtab:
|
2010-08-27 17:18:28 +00:00
|
|
|
* :indentSize=7:tabSize=8:noTabs=true:
|
|
|
|
*/
|