![Bill Meier](/assets/img/avatar_default.png)
Change-Id: I391cdf80a6e4ae5b0f4068e0500a90d013588f8a Reviewed-on: https://code.wireshark.org/review/4442 Reviewed-by: Bill Meier <wmeier@newsguy.com>
571 lines
15 KiB
C
571 lines
15 KiB
C
/* packet-enttec.c
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* Routines for ENTTEC packet disassembly
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*
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* Copyright (c) 2003,2004 by Erwin Rol <erwin@erwinrol.com>
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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 1999 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 files */
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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/addr_resolv.h>
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#include <epan/prefs.h>
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#include <epan/wmem/wmem.h>
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/*
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* See
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*
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* http://www.enttec.com/docs/enttec_protocol.pdf
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*/
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/* Define UDP/TCP ports for ENTTEC */
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#define UDP_PORT_ENTTEC 0x0D05
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#define TCP_PORT_ENTTEC 0x0D05
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#define ENTTEC_HEAD_ESPR 0x45535052
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#define ENTTEC_HEAD_ESPP 0x45535050
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#define ENTTEC_HEAD_ESAP 0x45534150
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#define ENTTEC_HEAD_ESDD 0x45534444
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#define ENTTEC_HEAD_ESNC 0x45534E43
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#define ENTTEC_HEAD_ESZZ 0x45535A5A
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static const value_string enttec_head_vals[] = {
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{ ENTTEC_HEAD_ESPR, "Poll Reply" },
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{ ENTTEC_HEAD_ESPP, "Poll" },
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{ ENTTEC_HEAD_ESAP, "Ack/nAck" },
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{ ENTTEC_HEAD_ESDD, "DMX Data" },
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{ ENTTEC_HEAD_ESNC, "Config" },
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{ ENTTEC_HEAD_ESZZ, "Reset" },
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{ 0, NULL }
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};
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#define ENTTEC_DATA_TYPE_DMX 0x01
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#define ENTTEC_DATA_TYPE_CHAN_VAL 0x02
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#define ENTTEC_DATA_TYPE_RLE 0x04
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static const value_string enttec_data_type_vals[] = {
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{ ENTTEC_DATA_TYPE_DMX, "Uncompressed DMX" },
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{ ENTTEC_DATA_TYPE_CHAN_VAL, "Channel+Value" },
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{ ENTTEC_DATA_TYPE_RLE, "RLE Compressed DMX" },
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{ 0, NULL }
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};
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void proto_register_enttec(void);
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void proto_reg_handoff_enttec(void);
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/* Define the enttec proto */
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static int proto_enttec = -1;
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/* general */
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static int hf_enttec_head = -1;
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/* poll */
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static int hf_enttec_poll_type = -1;
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/* poll reply */
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static int hf_enttec_poll_reply_mac = -1;
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static int hf_enttec_poll_reply_node_type = -1;
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static int hf_enttec_poll_reply_version = -1;
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static int hf_enttec_poll_reply_switch = -1;
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static int hf_enttec_poll_reply_name = -1;
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static int hf_enttec_poll_reply_option = -1;
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static int hf_enttec_poll_reply_tos = -1;
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static int hf_enttec_poll_reply_ttl = -1;
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/* dmx data */
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static int hf_enttec_dmx_data_universe = -1;
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static int hf_enttec_dmx_data_start_code = -1;
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static int hf_enttec_dmx_data_type = -1;
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static int hf_enttec_dmx_data_size = -1;
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static int hf_enttec_dmx_data_data = -1;
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static int hf_enttec_dmx_data_data_filter = -1;
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static int hf_enttec_dmx_data_dmx_data = -1;
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/* Define the tree for enttec */
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static int ett_enttec = -1;
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/*
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* Here are the global variables associated with the preferences
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* for enttec
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*/
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static guint global_udp_port_enttec = UDP_PORT_ENTTEC;
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static guint global_tcp_port_enttec = TCP_PORT_ENTTEC;
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static gint global_disp_chan_val_type = 0;
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static gint global_disp_col_count = 16;
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static gint global_disp_chan_nr_type = 0;
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static gint
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dissect_enttec_poll_reply(tvbuff_t *tvb, guint offset, proto_tree *tree)
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{
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proto_tree_add_item(tree, hf_enttec_poll_reply_mac, tvb,
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offset, 6, ENC_NA);
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offset += 6;
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proto_tree_add_item(tree, hf_enttec_poll_reply_node_type, tvb,
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offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(tree, hf_enttec_poll_reply_version, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_item(tree, hf_enttec_poll_reply_switch, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_item(tree, hf_enttec_poll_reply_name, tvb,
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offset, 10, ENC_ASCII|ENC_NA);
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offset += 10;
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proto_tree_add_item(tree, hf_enttec_poll_reply_option, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_item(tree, hf_enttec_poll_reply_tos, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_item(tree, hf_enttec_poll_reply_ttl, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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/* data */
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return offset;
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}
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static gint
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dissect_enttec_poll(tvbuff_t *tvb, guint offset, proto_tree *tree)
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{
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proto_tree_add_item(tree, hf_enttec_poll_type, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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return offset;
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}
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static gint
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dissect_enttec_ack(tvbuff_t *tvb _U_, guint offset, proto_tree *tree _U_)
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{
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return offset;
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}
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static gint
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dissect_enttec_dmx_data(tvbuff_t *tvb, guint offset, proto_tree *tree)
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{
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static const char* chan_format[] = {
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"%2u ",
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"%02x ",
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"%3u "
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};
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static const char* string_format[] = {
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"%03x: %s",
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"%3u: %s"
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};
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guint8 *dmx_data = (guint8 *)wmem_alloc(wmem_packet_scope(), 512 * sizeof(guint8));
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guint16 *dmx_data_offset = (guint16 *)wmem_alloc(wmem_packet_scope(), 513 * sizeof(guint16)); /* 1 extra for last offset */
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wmem_strbuf_t *dmx_epstr;
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proto_tree *hi,*si;
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proto_item *item;
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guint16 length,r,c,row_count;
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guint8 v,type,count;
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guint16 ci,ui,i,start_offset,end_offset;
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proto_tree_add_item(tree, hf_enttec_dmx_data_universe, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_item(tree, hf_enttec_dmx_data_start_code, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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type = tvb_get_guint8(tvb, offset);
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proto_tree_add_item(tree, hf_enttec_dmx_data_type, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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length = tvb_get_ntohs(tvb, offset);
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proto_tree_add_item(tree, hf_enttec_dmx_data_size, tvb,
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offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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/*
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* XXX - we should handle a too-long length better.
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*/
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if (length > 512)
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length = 512;
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if (type == ENTTEC_DATA_TYPE_RLE) {
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/* uncompress the DMX data */
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ui = 0;
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ci = 0;
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while (ci < length && ui < 512) {
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v = tvb_get_guint8(tvb, offset+ci);
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if (v == 0xFE) {
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ci++;
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count = tvb_get_guint8(tvb, offset+ci);
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ci++;
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v = tvb_get_guint8(tvb, offset+ci);
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ci++;
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for (i=0;i < count && ui < 512;i++) {
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dmx_data[ui] = v;
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dmx_data_offset[ui] = ci-3;
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ui++;
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}
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} else if (v == 0xFD) {
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ci++;
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v = tvb_get_guint8(tvb, offset+ci);
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dmx_data[ui] = v;
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dmx_data_offset[ui] = ci;
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ci++;
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ui++;
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} else {
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dmx_data[ui] = v;
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dmx_data_offset[ui] = ci;
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ui++;
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ci++;
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}
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}
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dmx_data_offset[ui] = ci;
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} else {
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for (ui=0; ui < length;ui++) {
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dmx_data[ui] = tvb_get_guint8(tvb, offset+ui);
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dmx_data_offset[ui] = ui;
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}
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dmx_data_offset[ui] = ui;
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}
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if ((type == ENTTEC_DATA_TYPE_DMX || type == ENTTEC_DATA_TYPE_RLE) && global_disp_col_count > 0) {
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hi = proto_tree_add_item(tree,
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hf_enttec_dmx_data_data,
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tvb,
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offset,
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length,
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ENC_NA);
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si = proto_item_add_subtree(hi, ett_enttec);
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row_count = (ui/global_disp_col_count) + ((ui%global_disp_col_count) == 0 ? 0 : 1);
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dmx_epstr = wmem_strbuf_new_label(wmem_packet_scope());
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for (r=0; r < row_count;r++) {
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for (c=0;(c < global_disp_col_count) && (((r*global_disp_col_count)+c) < ui);c++) {
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if ((global_disp_col_count > 1) && (c % (global_disp_col_count/2)) == 0) {
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wmem_strbuf_append_c(dmx_epstr, ' ');
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}
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v = dmx_data[(r*global_disp_col_count)+c];
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if (global_disp_chan_val_type == 0) {
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v = (v * 100) / 255;
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if (v == 100) {
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wmem_strbuf_append(dmx_epstr, "FL ");
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} else {
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wmem_strbuf_append_printf(dmx_epstr, chan_format[global_disp_chan_val_type], v);
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}
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} else {
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wmem_strbuf_append_printf(dmx_epstr, chan_format[global_disp_chan_val_type], v);
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}
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}
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start_offset = dmx_data_offset[(r*global_disp_col_count)];
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end_offset = dmx_data_offset[(r*global_disp_col_count)+c];
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proto_tree_add_none_format(si,hf_enttec_dmx_data_dmx_data, tvb,
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offset+start_offset,
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end_offset-start_offset,
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string_format[global_disp_chan_nr_type], (r*global_disp_col_count)+1,
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wmem_strbuf_get_str(dmx_epstr));
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wmem_strbuf_truncate(dmx_epstr, 0);
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}
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item = proto_tree_add_item(si, hf_enttec_dmx_data_data_filter, tvb,
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offset, length, ENC_NA );
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PROTO_ITEM_SET_HIDDEN(item);
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offset += length;
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} else if (type == ENTTEC_DATA_TYPE_CHAN_VAL) {
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proto_tree_add_item(tree, hf_enttec_dmx_data_data_filter, tvb,
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offset, length, ENC_NA);
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offset += length;
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} else {
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proto_tree_add_item(tree, hf_enttec_dmx_data_data_filter, tvb,
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offset, length, ENC_NA);
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offset += length;
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}
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return offset;
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}
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static gint
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dissect_enttec_config(tvbuff_t *tvb _U_, guint offset, proto_tree *tree _U_)
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{
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return offset;
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}
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static gint
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dissect_enttec_reset(tvbuff_t *tvb _U_, guint offset, proto_tree *tree _U_)
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{
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return offset;
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}
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static int
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dissect_enttec(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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{
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gint offset = 0;
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guint32 head = 0;
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proto_tree *ti,*enttec_tree=NULL;
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/* Set the protocol column */
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "ENTTEC");
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head = tvb_get_ntohl(tvb, offset);
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/* Clear out stuff in the info column */
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col_add_fstr(pinfo->cinfo, COL_INFO, "%s",
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val_to_str(head, enttec_head_vals, "Unknown (0x%08x)"));
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if (tree) {
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ti = proto_tree_add_item(tree, proto_enttec, tvb, offset, -1, ENC_NA);
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enttec_tree = proto_item_add_subtree(ti, ett_enttec);
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}
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if (enttec_tree) {
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proto_tree_add_item(enttec_tree, hf_enttec_head, tvb,
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offset, 4, ENC_BIG_ENDIAN );
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offset += 4;
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switch (head) {
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case ENTTEC_HEAD_ESPR:
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offset = dissect_enttec_poll_reply( tvb, offset, enttec_tree);
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break;
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case ENTTEC_HEAD_ESPP:
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offset = dissect_enttec_poll( tvb, offset, enttec_tree);
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break;
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case ENTTEC_HEAD_ESAP:
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offset = dissect_enttec_ack( tvb, offset, enttec_tree);
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break;
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case ENTTEC_HEAD_ESDD:
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offset = dissect_enttec_dmx_data( tvb, offset, enttec_tree);
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break;
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case ENTTEC_HEAD_ESNC:
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offset = dissect_enttec_config( tvb, offset, enttec_tree);
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break;
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case ENTTEC_HEAD_ESZZ:
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offset = dissect_enttec_reset( tvb, offset, enttec_tree);
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break;
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}
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}
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return offset;
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}
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void
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proto_register_enttec(void)
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{
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static hf_register_info hf[] = {
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/* General */
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{ &hf_enttec_head,
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{ "Head", "enttec.head",
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FT_UINT32, BASE_HEX, VALS(enttec_head_vals), 0x0,
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NULL, HFILL } },
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{ &hf_enttec_poll_reply_mac,
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{ "MAC", "enttec.poll_reply.mac",
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FT_ETHER, BASE_NONE, NULL, 0x0,
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NULL, HFILL } },
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{ &hf_enttec_poll_reply_node_type,
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{ "Node Type", "enttec.poll_reply.node_type",
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FT_UINT16, BASE_HEX, NULL, 0x0,
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NULL, HFILL } },
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{ &hf_enttec_poll_reply_version,
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{ "Version", "enttec.poll_reply.version",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL } },
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{ &hf_enttec_poll_reply_switch,
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{ "Switch settings", "enttec.poll_reply.switch_settings",
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FT_UINT8, BASE_HEX, NULL, 0x0,
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NULL, HFILL } },
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{ &hf_enttec_poll_reply_name,
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{ "Name", "enttec.poll_reply.name",
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FT_STRING, BASE_NONE, NULL, 0x0,
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NULL, HFILL } },
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{ &hf_enttec_poll_reply_option,
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{ "Option Field", "enttec.poll_reply.option_field",
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FT_UINT8, BASE_HEX, NULL, 0x0,
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NULL, HFILL } },
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{ &hf_enttec_poll_reply_tos,
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{ "TOS", "enttec.poll_reply.tos",
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FT_UINT8, BASE_HEX, NULL, 0x0,
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NULL, HFILL } },
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{ &hf_enttec_poll_reply_ttl,
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{ "TTL", "enttec.poll_reply.ttl",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL } },
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{ &hf_enttec_dmx_data_universe,
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{ "Universe", "enttec.dmx_data.universe",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL } },
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{ &hf_enttec_dmx_data_start_code,
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{ "Start Code", "enttec.dmx_data.start_code",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL } },
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{ &hf_enttec_dmx_data_type,
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{ "Data Type", "enttec.dmx_data.type",
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FT_UINT8, BASE_HEX, VALS(enttec_data_type_vals), 0x0,
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NULL, HFILL } },
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{ &hf_enttec_dmx_data_size,
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{ "Data Size", "enttec.dmx_data.size",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL } },
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{ &hf_enttec_dmx_data_data,
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{ "DMX Data", "enttec.dmx_data.data",
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FT_NONE, BASE_NONE, NULL, 0x0,
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NULL, HFILL } },
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{ &hf_enttec_dmx_data_data_filter,
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{ "DMX Data", "enttec.dmx_data.data_filter",
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FT_BYTES, BASE_NONE, NULL, 0x0,
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NULL, HFILL } },
|
|
{ &hf_enttec_dmx_data_dmx_data,
|
|
{ "DMX Data", "enttec.dmx_data.dmx_data",
|
|
FT_NONE, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL } },
|
|
{ &hf_enttec_poll_type,
|
|
{ "Reply Type", "enttec.poll.reply_type",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL } }
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_enttec,
|
|
};
|
|
|
|
module_t *enttec_module;
|
|
|
|
static const enum_val_t disp_chan_val_types[] = {
|
|
{ "pro", "Percent", 0 },
|
|
{ "hex", "Hexadecimal", 1 },
|
|
{ "dec", "Decimal", 2 },
|
|
{ NULL, NULL, 0 }
|
|
};
|
|
|
|
static const enum_val_t disp_chan_nr_types[] = {
|
|
{ "hex", "Hexadecimal", 0 },
|
|
{ "dec", "Decimal", 1 },
|
|
{ NULL, NULL, 0 }
|
|
};
|
|
|
|
static const enum_val_t col_count[] = {
|
|
{ "6", "6", 6 },
|
|
{ "10", "10", 10 },
|
|
{ "12", "12", 12 },
|
|
{ "16", "16", 16 },
|
|
{ "24", "24", 24 },
|
|
{ NULL, NULL, 0 }
|
|
};
|
|
|
|
proto_enttec = proto_register_protocol("ENTTEC", "ENTTEC","enttec");
|
|
proto_register_field_array(proto_enttec,hf,array_length(hf));
|
|
proto_register_subtree_array(ett,array_length(ett));
|
|
|
|
enttec_module = prefs_register_protocol(proto_enttec,
|
|
proto_reg_handoff_enttec);
|
|
prefs_register_uint_preference(enttec_module, "udp_port",
|
|
"ENTTEC UDP Port",
|
|
"The UDP port on which ENTTEC packets will be sent",
|
|
10,&global_udp_port_enttec);
|
|
|
|
prefs_register_uint_preference(enttec_module, "tcp_port",
|
|
"ENTTEC TCP Port",
|
|
"The TCP port on which ENTTEC packets will be sent",
|
|
10,&global_tcp_port_enttec);
|
|
|
|
prefs_register_enum_preference(enttec_module, "dmx_disp_chan_val_type",
|
|
"DMX Display channel value type",
|
|
"The way DMX values are displayed",
|
|
&global_disp_chan_val_type,
|
|
disp_chan_val_types, FALSE);
|
|
|
|
prefs_register_enum_preference(enttec_module, "dmx_disp_chan_nr_type",
|
|
"DMX Display channel nr. type",
|
|
"The way DMX channel numbers are displayed",
|
|
&global_disp_chan_nr_type,
|
|
disp_chan_nr_types, FALSE);
|
|
|
|
prefs_register_enum_preference(enttec_module, "dmx_disp_col_count",
|
|
"DMX Display Column Count",
|
|
"The number of columns for the DMX display",
|
|
&global_disp_col_count,
|
|
col_count, FALSE);
|
|
}
|
|
|
|
/* The registration hand-off routing */
|
|
void
|
|
proto_reg_handoff_enttec(void) {
|
|
static gboolean enttec_initialized = FALSE;
|
|
static dissector_handle_t enttec_handle;
|
|
static guint udp_port_enttec;
|
|
static guint tcp_port_enttec;
|
|
|
|
if(!enttec_initialized) {
|
|
enttec_handle = new_create_dissector_handle(dissect_enttec,proto_enttec);
|
|
enttec_initialized = TRUE;
|
|
} else {
|
|
dissector_delete_uint("udp.port",udp_port_enttec,enttec_handle);
|
|
dissector_delete_uint("tcp.port",tcp_port_enttec,enttec_handle);
|
|
}
|
|
|
|
udp_port_enttec = global_udp_port_enttec;
|
|
tcp_port_enttec = global_tcp_port_enttec;
|
|
|
|
dissector_add_uint("udp.port",global_udp_port_enttec,enttec_handle);
|
|
dissector_add_uint("tcp.port",global_tcp_port_enttec,enttec_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* tab-width: 8
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
|
|
* :indentSize=8:tabSize=8:noTabs=false:
|
|
*/
|