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Ethereal-dev: [Ethereal-dev] Patch for new dissector plugin for Ether-S-Bus telegrams

Note: This archive is from the project's previous web site, ethereal.com. This list is no longer active.

From: Christian Durrer <Christian.durrer@xxxxxxxxxxxx>
Date: Sat, 03 Jun 2006 20:23:55 +0200
Hi,

I hope this is the right place to send a patch for a new dissector
plugin. The telegram it dissects are for the communication between PLCs
(Programmable logic controller) from the company Saia Burgess Controls
Ltd. (http://www.start-controls.com, http://www.saia-burgess.com or
http://www.sbc-support.ch). The protocol is named Ether-S-Bus (the PLCs
are called PCD2, PCD3, PCD4).
We developped this dissector for easyer debugging of networks containing
our contollers.

The patch was created against Ethereal Version 1.1.0 (SVN Rev 18189). I
tested it with various capture files (which some of them also fuzzed).
The VariousSBus is one of them.

I also would like to make you a big compliment! Ethereal is a great
tool!

I'm available for any your questions 

With best regards

Christian Durrer
Index: /ethereal/configure.in
===================================================================
--- /ethereal/configure.in        (revision 18189)
+++ /ethereal/configure.in        (working copy)
@@ -1340,6 +1340,7 @@
   plugins/rlm/Makefile
   plugins/rtnet/Makefile
   plugins/rudp/Makefile
+  plugins/sbus/Makefile
   plugins/stats_tree/Makefile
   plugins/v5ua/Makefile
   tools/Makefile
Index: /ethereal/Makefile.am
===================================================================
--- /ethereal/Makefile.am (revision 18189)
+++ /ethereal/Makefile.am (working copy)
@@ -209,6 +209,7 @@
        plugins/rlm/rlm.la \
        plugins/rtnet/rtnet.la \
        plugins/rudp/rudp.la \
+       plugins/sbus/sbus.la \
        plugins/stats_tree/stats_tree.la \
        plugins/v5ua/v5ua.la
 
@@ -249,6 +250,7 @@
        "-dlopen" plugins/rlm/rlm.la \
        "-dlopen" plugins/rtnet/rtnet.la \
        "-dlopen" plugins/rudp/rudp.la \
+       "-dlopen" plugins/sbus/sbus.la \
        "-dlopen" plugins/stats_tree/stats_tree.la \
        "-dlopen" plugins/v5ua/v5ua.la
 
Index: /ethereal/plugins/Makefile.nmake
===================================================================
--- /ethereal/plugins/Makefile.nmake      (revision 18189)
+++ /ethereal/plugins/Makefile.nmake      (working copy)
@@ -30,6 +30,7 @@
        rlm \
        rtnet \
        rudp \
+       sbus \
        stats_tree \
        v5ua
 
@@ -151,6 +152,11 @@
        $(MAKE) /$(MAKEFLAGS) -f Makefile.nmake
        cd ..
 
+sbus:: 
+       cd sbus
+       $(MAKE) /$(MAKEFLAGS) -f Makefile.nmake
+       cd ..
+
 stats_tree:: 
        cd stats_tree
        $(MAKE) /$(MAKEFLAGS) -f Makefile.nmake
@@ -209,6 +215,8 @@
        $(MAKE) /$(MAKEFLAGS) -f Makefile.nmake clean
        cd ../rudp
        $(MAKE) /$(MAKEFLAGS) -f Makefile.nmake clean
+       cd ../sbus
+       $(MAKE) /$(MAKEFLAGS) -f Makefile.nmake clean
        cd ../stats_tree
        $(MAKE) /$(MAKEFLAGS) -f Makefile.nmake clean
        cd ../v5ua
@@ -262,6 +270,8 @@
        $(MAKE) /$(MAKEFLAGS) -f Makefile.nmake distclean
        cd ../rudp
        $(MAKE) /$(MAKEFLAGS) -f Makefile.nmake distclean
+       cd ../sbus
+       $(MAKE) /$(MAKEFLAGS) -f Makefile.nmake distclean
        cd ../stats_tree
        $(MAKE) /$(MAKEFLAGS) -f Makefile.nmake distclean
        cd ../v5ua
@@ -313,6 +323,8 @@
        $(MAKE) /$(MAKEFLAGS) -f Makefile.nmake maintainer-clean
        cd ../rudp
        $(MAKE) /$(MAKEFLAGS) -f Makefile.nmake maintainer-clean
+       cd ../sbus
+       $(MAKE) /$(MAKEFLAGS) -f Makefile.nmake maintainer-clean
        cd ../stats_tree
        $(MAKE) /$(MAKEFLAGS) -f Makefile.nmake maintainer-clean
        cd ../v5ua
@@ -353,6 +365,7 @@
        xcopy rlm\*.dll $(VERSION) /d
        xcopy rtnet\*.dll $(VERSION) /d
        xcopy rudp\*.dll $(VERSION) /d
+       xcopy sbus\*.dll $(VERSION) /d
        xcopy stats_tree\*.dll $(VERSION) /d
        xcopy v5ua\*.dll $(VERSION) /d
 !ENDIF
Index: /ethereal/plugins/Makefile.am
===================================================================
--- /ethereal/plugins/Makefile.am (revision 18189)
+++ /ethereal/plugins/Makefile.am (working copy)
@@ -52,6 +52,7 @@
        rlm \
        rtnet \
        rudp \
+       sbus \
        stats_tree \
        v5ua
 
Index: /ethereal/plugins/sbus/packet-sbus.c
===================================================================
--- /ethereal/plugins/sbus/packet-sbus.c  (revision 0)
+++ /ethereal/plugins/sbus/packet-sbus.c  (revision 0)
@@ -0,0 +1,1587 @@
+/* packet-sbus.c
+ * Routines for Ether-S-Bus dissection 
+ * Copyright 2006, Christian Durrer <christian.durrer@xxxxxxxxxxxx>
+ *
+ * $Id: README.developer 13926 2005-03-26 23:31:35Z guy $
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@xxxxxxxxxxxx>
+ * Copyright 1998 Gerald Combs
+ * 
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <glib.h>
+#include <gmodule.h>
+#include <epan/packet.h>
+#include <epan/prefs.h>
+#include <epan/conversation.h>
+
+#ifndef ENABLE_STATIC
+G_MODULE_EXPORT const gchar version[] = "0.0.4";
+#endif
+
+
+/* Number of entries in the memeory chunk array (for conversation)*/
+#define SBUS_MEMCHUNKSIZE 20
+/* Attribut values*/
+#define SBUS_REQUEST   0x00
+#define SBUS_RESPONSE  0x01
+#define SBUS_ACKNAK    0x02
+
+/* Bitfield in the arithmetic flags and accu*/
+#define F_ACCU      (1<<0)           /* Accumulator of PCD             */
+#define F_ERROR     (1<<1)          /* Error flag of PCD              */
+#define F_NEGATIVE  (1<<2)        /* Negative arithmetic status flag*/
+#define F_ZERO      (1<<3)          /* Zero arithmetic status flag    */
+
+/* Bitfield in the system information*/
+/*#define F_EMPTY      (1<<0)          always 0             */
+#define F_MEMSIZE      (1<<1)        /* Memory size information*/
+#define F_TRACE        (1<<2)        /* Trace buffer feature              */
+#define F_INFO_B1      (1<<3)        /* EEPROM information of slot B1*/
+#define F_INFO_B2      (1<<4)        /* EEPROM informatino of slot B2*/
+#define F_PGU_BAUD (1<<5)             /* PGU baudrate can be switched*/
+
+/* Forward declaration we need below */
+void proto_reg_handoff_sbus(void);
+
+/* Initialize the protocol and registered fields */
+static int proto_sbus = -1;
+/* Only debugging @@@
+static int hf_sbus_debug = -1;*/
+
+static int hf_sbus_length = -1;
+static int hf_sbus_version = -1;
+static int hf_sbus_protocol = -1;
+static int hf_sbus_sequence = -1;
+static int hf_sbus_attribut = -1;
+static int hf_sbus_dest = -1;
+static int hf_sbus_address = -1;
+static int hf_sbus_command = -1;
+static int hf_sbus_command_extension = -1;
+static int hf_sbus_rcount = -1;
+static int hf_sbus_wcount = -1;
+static int hf_sbus_wcount_calculated = -1;
+static int hf_sbus_fio_count = -1;
+static int hf_sbus_addr_rtc = -1;
+static int hf_sbus_addr_iof = -1;
+static int hf_sbus_addr_eeprom = -1;
+static int hf_sbus_addr_prog = -1;
+static int hf_sbus_addr_68k = -1;
+static int hf_sbus_block_type = -1;
+static int hf_sbus_block_nr = -1;
+static int hf_sbus_nbr_elements = -1;
+
+static int hf_sbus_display_register = -1;
+
+static int hf_sbus_data_rtc = -1;
+static int hf_sbus_data_byte = -1;
+static int hf_sbus_data_byte_hex = -1;
+static int hf_sbus_data_iof = -1;
+static int hf_sbus_cpu_type = -1;
+static int hf_sbus_fw_version = -1;
+static int hf_sbus_sysinfo_nr = -1;
+static int hf_sbus_sysinfo0_1 = -1;
+static int hf_sbus_sysinfo0_2 = -1;
+static int hf_sbus_sysinfo0_3 = -1;
+static int hf_sbus_sysinfo0_4 = -1;
+static int hf_sbus_sysinfo0_5 = -1;
+static int hf_sbus_sysinfo_length = -1;
+static int hf_sbus_f_module_type = -1;
+static int hf_sbus_harware_version = -1;
+static int hf_sbus_hardware_modification = -1;
+static int hf_sbus_various = -1;
+static int hf_sbus_acknackcode = -1;
+static int hf_sbus_cpu_status = -1;
+static int hf_sbus_week_day = -1;
+static int hf_sbus_date = -1;
+static int hf_sbus_time = -1;
+static int hf_sbus_crc = -1;
+static int hf_sbus_crc_bad = -1;
+static int hf_sbus_flags_accu = -1;
+static int hf_sbus_flags_error = -1;
+static int hf_sbus_flags_negative = -1;
+static int hf_sbus_flags_zero = -1;
+
+/* Web server telegram */
+static int hf_sbus_web_size = -1;
+static int hf_sbus_web_aid = -1;
+static int hf_sbus_web_seq = -1;
+
+/* Initialize the subtree pointers */
+static gint ett_sbus = -1;
+static gint ett_sbus_ether = -1;
+static gint ett_sbus_data = -1;
+
+/* True/False strings*/
+static const true_false_string tfs_sbus_flags= {
+       "Is high",
+       "Is low"
+};
+
+static const true_false_string tfs_sbus_present= {
+       "Is present",
+       "Is not present"
+};
+
+/* value to string definitions*/
+/* telegram types*/
+static const value_string sbus_att_vals[] = {
+       {0, "Request"},
+       {1, "Response"},
+       {2, "ACK/NAK"},
+       {0, NULL},
+};
+/* Block types*/
+static const value_string sbus_block_types[] = {
+       {0x00, "COB"},
+       {0x01, "XOB"},
+       {0x02, "PB"},
+       {0x03, "FB"},
+       {0x04, "ST"},
+       {0x05, "TR"},
+       {0x04, "TEXT"},
+       {0x05, "DB"},
+       {0x08, "SB"},
+       {0, NULL},
+};
+/* ACK NAK values*/
+static const value_string sbus_CPU_status[] = {
+       {0x43, "C"},
+       {0x44, "D"},
+       {0x48, "Halt"},
+       {0x52, "Run"},
+       {0x53, "Stop"},
+       {0x58, "X, Exceptional Intermediate Status (MODEMS+)"},
+       {0, NULL},
+};
+/* CPU status*/
+static const value_string sbus_ack_nak_vals[] = {
+       {0, "ACK (Acknowledged)"},
+       {1, "NAK, no reason specified"},
+       {2, "NAK, because of password"},
+       {3, "NAK, PGU port is in reduced protocol"},
+       {4, "NAK, PGU port is already used"},
+       {0, NULL},
+};
+/* S-Bus commands*/
+static const value_string sbus_command_vals[] = {
+       {0x00, "Read counter(s)"},
+       {0x01, "Read display register"},
+       {0x02, "Read flag(s)"},
+       {0x03, "Read input(s)"},
+       {0x04, "Read real time clock"},
+       {0x05, "Read output(s)"},
+       {0x06, "Read register(s)"},
+       {0x07, "Read timer(s)"},
+       {0x0A, "Write counter(s)"},
+       {0x0B, "Write flag(s)"},
+       {0x0C, "Write real time clock"},
+       {0x0D, "Write output(s)"},
+       {0x0E, "Write register(s)"},
+       {0x0F, "Write timer(s)"},
+       {0x14, "Read PCD status, CPU 0"},
+       {0x15, "Read PCD status, CPU 1"},
+       {0x16, "Read PCD status, CPU 2"},
+       {0x17, "Read PCD status, CPU 3"},
+       {0x18, "Read PCD status, CPU 4"},
+       {0x19, "Read PCD status, CPU 5"},
+       {0x1A, "Read PCD status, CPU 6"},
+       {0x1B, "Read PCD status (own)"},
+       {0x1D, "Read S-Bus station number"},
+       {0x1E, "Read user memory*"},
+       {0x1F, "Read program line*"},
+       {0x20, "Read firmware version"},
+       {0x21, "Read text*"},
+       {0x22, "Read active transition*"},
+       {0x23, "Write user memeory*"},
+       {0x24, "Write program line*"},
+       {0x25, "Write text*"},
+       {0x28, "Run procedure*, CPU 0"},
+       {0x29, "Run procedure*, CPU 1"},
+       {0x2A, "Run procedure*, CPU 2"},
+       {0x2B, "Run procedure*, CPU 3"},
+       {0x2C, "Run procedure*, CPU 4"},
+       {0x2D, "Run procedure*, CPU 5"},
+       {0x2E, "Run procedure*, CPU 6"},
+       {0x2F, "Run procedure* (own CPU)"},
+       {0x30, "Run procedure* (All CPUs)"},
+       {0x32, "Restart cold CPU 1*"},
+       {0x33, "Restart cold CPU 2*"},
+       {0x34, "Restart cold CPU 3*"},
+       {0x35, "Restart cold CPU 4*"},
+       {0x36, "Restart cold CPU 5*"},
+       {0x37, "Restart cold CPU 6*"},
+       {0x38, "Restart cold own CPU*"},
+       {0x39, "Restart cold all CPUs*"},
+       {0x3C, "Stop procedure*, CPU 0"},
+       {0x3D, "Stop procedure*, CPU 1"},
+       {0x3E, "Stop procedure*, CPU 2"},
+       {0x3F, "Stop procedure*, CPU 3"},
+       {0x40, "Stop procedure*, CPU 4"},
+       {0x41, "Stop procedure*, CPU 5"},
+       {0x42, "Stop procedure*, CPU 6"},
+       {0x43, "Stop procedure*, (own CPU)"},
+       {0x44, "Stop procedure*, (All CPUs)"},
+       {0x46, "Read arithmetic status and ACCU*"},
+       {0x47, "Read byte"},
+       {0x48, "Read halt failure register*"},
+       {0x49, "Read index register*"},
+       {0x4A, "Read instruction pointer*"},
+       {0x4B, "Find history*"},
+       {0x50, "Write arithmetic staus and ACCU*"},
+       {0x51, "Write byte*"},
+       {0x52, "Write index register"},
+       {0x53, "Write instruction pointer*"},
+       {0x5A, "Clear all (F, O, R, T)*"},
+       {0x5B, "Clear flags*"},
+       {0x5C, "Clear outputs*"},
+       {0x5D, "Clear registers*"},
+       {0x5E, "Clear timers*"},
+       {0x64, "Restart warm CPU 1*"},
+       {0x65, "Restart warm CPU 2*"},
+       {0x66, "Restart warm CPU 3*"},
+       {0x67, "Restart warm CPU 4*"},
+       {0x68, "Restart warm CPU 5*"},
+       {0x69, "Restart warm CPU 6*"},
+       {0x6A, "Restart warm (own CPU)*"},
+       {0x6B, "Restart warm (All CPUs)*"},
+       {0x6E, "Change block*"},
+       {0x6F, "Clear history failure*"},
+       {0x70, "Delete program line*"},
+       {0x71, "Go conditional*"},
+       {0x72, "Insert program line*"},
+       {0x73, "Local cycles*"},
+       {0x74, "All cycles*"},
+       {0x75, "Make text*"},
+       {0x76, "Execute single instruction*"},
+       {0x77, "Single step*"},
+       {0x82, "XOB 17 interrupt"},
+       {0x83, "XOB 18 interrupt"},
+       {0x84, "XOB 19 interrupt"},
+       {0x91, "Read hangup timeout"},
+       {0x96, "Read data block"},
+       {0x97, "Write data block"},
+       {0x98, "Make data block*"},
+       {0x99, "Clear data block*"},
+       {0x9A, "Clear text*"},
+       {0x9B, "Read block address"},
+       {0x9C, "Read block sizes"},
+       {0x9D, "Read current block*"},
+       {0x9E, "Read call stack*"},
+       {0x9F, "Read DBX"},
+       {0xA1, "Read user EEPROM register"},
+       {0xA3, "Write user EEPROM register"},
+       {0xA5, "Erase flash*"},
+       {0xA6, "Restart cold flag*"},
+       {0xA7, "Write system buffer"},
+       {0xA8, "Read system buffer"},
+       {0xAA, "Get diagnostic*"},
+       {0xAB, "Read system information*"},
+       {0xAC, "Changes blocks on run*"},
+       {0xAD, "Flashcard telegram*"},
+       {0xAE, "Download FW*"},
+       {0xAF, "Web server serial communication*"},
+       {0, NULL},
+};
+
+static const value_string webserver_aid_vals[] = {
+       {0x01, "Partitial request"},
+       {0x02, "Request end"},
+       {0x07, "Get Data"},
+       {0x10, "Transfer OK"},
+       {0x11, "Partial answer"},
+       {0x12, "Last part of answer"},
+       {0x13, "Server not ready"},
+       {0, NULL}
+};
+
+static const guint crc_table[] = {
+       0x0000,0x1021,0x2042,0x3063,0x4084,0x50a5,0x60c6,0x70e7,0x8108,0x9129,0xa14a,0xb16b,0xc18c,0xd1ad,0xe1ce,0xf1ef,
+       0x1231,0x0210,0x3273,0x2252,0x52b5,0x4294,0x72f7,0x62d6,0x9339,0x8318,0xb37b,0xa35a,0xd3bd,0xc39c,0xf3ff,0xe3de,
+       0x2462,0x3443,0x0420,0x1401,0x64e6,0x74c7,0x44a4,0x5485,0xa56a,0xb54b,0x8528,0x9509,0xe5ee,0xf5cf,0xc5ac,0xd58d,
+       0x3653,0x2672,0x1611,0x0630,0x76d7,0x66f6,0x5695,0x46b4,0xb75b,0xa77a,0x9719,0x8738,0xf7df,0xe7fe,0xd79d,0xc7bc,
+       0x48c4,0x58e5,0x6886,0x78a7,0x0840,0x1861,0x2802,0x3823,0xc9cc,0xd9ed,0xe98e,0xf9af,0x8948,0x9969,0xa90a,0xb92b,
+       0x5af5,0x4ad4,0x7ab7,0x6a96,0x1a71,0x0a50,0x3a33,0x2a12,0xdbfd,0xcbdc,0xfbbf,0xeb9e,0x9b79,0x8b58,0xbb3b,0xab1a,
+       0x6ca6,0x7c87,0x4ce4,0x5cc5,0x2c22,0x3c03,0x0c60,0x1c41,0xedae,0xfd8f,0xcdec,0xddcd,0xad2a,0xbd0b,0x8d68,0x9d49,
+       0x7e97,0x6eb6,0x5ed5,0x4ef4,0x3e13,0x2e32,0x1e51,0x0e70,0xff9f,0xefbe,0xdfdd,0xcffc,0xbf1b,0xaf3a,0x9f59,0x8f78,
+       0x9188,0x81a9,0xb1ca,0xa1eb,0xd10c,0xc12d,0xf14e,0xe16f,0x1080,0x00a1,0x30c2,0x20e3,0x5004,0x4025,0x7046,0x6067,
+       0x83b9,0x9398,0xa3fb,0xb3da,0xc33d,0xd31c,0xe37f,0xf35e,0x02b1,0x1290,0x22f3,0x32d2,0x4235,0x5214,0x6277,0x7256,
+       0xb5ea,0xa5cb,0x95a8,0x8589,0xf56e,0xe54f,0xd52c,0xc50d,0x34e2,0x24c3,0x14a0,0x0481,0x7466,0x6447,0x5424,0x4405,
+       0xa7db,0xb7fa,0x8799,0x97b8,0xe75f,0xf77e,0xc71d,0xd73c,0x26d3,0x36f2,0x0691,0x16b0,0x6657,0x7676,0x4615,0x5634,
+       0xd94c,0xc96d,0xf90e,0xe92f,0x99c8,0x89e9,0xb98a,0xa9ab,0x5844,0x4865,0x7806,0x6827,0x18c0,0x08e1,0x3882,0x28a3,
+       0xcb7d,0xdb5c,0xeb3f,0xfb1e,0x8bf9,0x9bd8,0xabbb,0xbb9a,0x4a75,0x5a54,0x6a37,0x7a16,0x0af1,0x1ad0,0x2ab3,0x3a92,
+       0xfd2e,0xed0f,0xdd6c,0xcd4d,0xbdaa,0xad8b,0x9de8,0x8dc9,0x7c26,0x6c07,0x5c64,0x4c45,0x3ca2,0x2c83,0x1ce0,0x0cc1,
+       0xef1f,0xff3e,0xcf5d,0xdf7c,0xaf9b,0xbfba,0x8fd9,0x9ff8,0x6e17,0x7e36,0x4e55,0x5e74,0x2e93,0x3eb2,0x0ed1,0x1ef0
+};
+
+/* Conversion values passing structure*/
+typedef struct {
+       guint32 conversation;  /*Conversation ID*/
+       guint16 sequence;             /*Sequence number of request telegram*/
+} sbus_request_key;
+
+typedef struct {
+       guint8 cmd_code;              /*command code from request*/
+       guint8 count;                /*rcount value*/
+       guint8 sysinfo;                      /*system information number (or command in other telegrams)*/
+} sbus_request_val;
+
+/* The GMemChunk base structure (for conversations)*/
+static GHashTable *sbus_request_hash = NULL;
+static GMemChunk *sbus_request_keys = NULL;
+static GMemChunk *sbus_request_vals = NULL;
+
+static guint crc_calc (guint crc, guint val) 
+{
+       int index;
+       guint ncrc;
+       
+       index = (((crc >> 8) ^ val) & 0xff);
+       ncrc = crc_table[index] ^ ((crc << 8) & 0xffff);
+
+       return ncrc;
+}
+
+/* Hash functions*/
+static gint sbus_equal(gconstpointer v, gconstpointer w)
+{
+       sbus_request_key *v1 = (sbus_request_key *)v;
+       sbus_request_key *v2 = (sbus_request_key *)w;
+
+       if (v1->conversation == v2->conversation &&
+              v1->sequence == v2->sequence) {
+              return 1;
+              }
+       return 0;
+}
+
+static guint sbus_hash(gconstpointer v)
+{
+       sbus_request_key *key = (sbus_request_key *)v;
+       guint val;
+       val = key->conversation + key->sequence;
+       return val;
+}
+
+/*Protocol initialisation*/
+static void sbus_init_protocol(void){
+       if (sbus_request_hash){
+              g_hash_table_destroy(sbus_request_hash);
+       }
+       if (sbus_request_keys){
+              g_mem_chunk_destroy(sbus_request_keys);
+       }      
+       if (sbus_request_vals){
+              g_mem_chunk_destroy(sbus_request_vals);
+       }
+       sbus_request_hash = g_hash_table_new(sbus_hash, sbus_equal);
+       sbus_request_keys = g_mem_chunk_new("sbus_request_keys",
+              sizeof(sbus_request_key),
+              SBUS_MEMCHUNKSIZE * sizeof(sbus_request_key),
+              G_ALLOC_AND_FREE);
+       sbus_request_vals = g_mem_chunk_new("sbus_request_vals",
+              sizeof(sbus_request_val),
+              SBUS_MEMCHUNKSIZE * sizeof(sbus_request_val),
+              G_ALLOC_AND_FREE);
+}
+
+/*Dissect the telegram*/
+static void
+dissect_sbus(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+
+/* Set up structures needed to add the protocol subtree and manage it */
+       proto_item *ti, *et, *dt;
+       proto_tree *sbus_tree, *ethsbus_tree, *sbusdata_tree;
+       
+       gboolean interpreted; /*for indication of interpreted telegrams*/
+       gint i;        /*for CRC calculation*/
+       gint j;        /*for CRC calculation*/
+       gint offset;
+       gint sbus_eth_len;
+       guint sbus_crc_calc;
+       guint8 sbus_version;
+       guint8 sbus_attribut;
+       guint8 sbus_media_cnt;
+       guint8 sbus_fio_cnt;
+       guint8 sbus_cmd_code;
+       guint8 sbus_hash_cmd_code;
+       guint8 sbus_web_size;
+       guint8 sbus_web_aid;
+       guint8 sbus_web_seq;
+       guint8 sbus_sysinfo_number;
+       guint8 sbus_sysinfolenght;
+       guint32 sbus_binarymasked;
+       guint32 sbus_binaries;
+       guint16 sbus_ack_code;
+       guint32 sbus_length;
+       guint32 sbus_sequence;
+       guint32 sbus_show_bin;
+       guint32 sbus_helper;
+       guint32 sbus_helper1;
+       guint32 sbus_helper2;
+       char *tmp_string;
+
+/* Set up conversations*/
+       conversation_t *conversation = NULL;
+       sbus_request_key request_key, *new_request_key;
+       sbus_request_val *request_val = NULL;
+       
+       conversation = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst,
+              pinfo->ptype, pinfo->srcport, pinfo->destport, 0);
+       
+       if (!conversation){
+              /* create new conversation*/
+              conversation = conversation_new(pinfo->fd->num, &pinfo->src, &pinfo->dst,
+                    pinfo->ptype, pinfo->srcport, pinfo->destport, 0);
+       }
+       
+       request_key.conversation = conversation->index;
+       request_key.sequence = tvb_get_ntohs(tvb,6);
+       
+       request_val = (sbus_request_val *) g_hash_table_lookup(sbus_request_hash, 
+                            &request_key);
+       /* Only allocate a new hash element when it's a request*/
+       sbus_attribut = tvb_get_guint8(tvb,8); 
+        
+       if ( !request_val && sbus_attribut == 0 ) {/* request telegram */
+                     
+              new_request_key = g_mem_chunk_alloc(sbus_request_keys);
+              *new_request_key = request_key;
+              
+              request_val = g_mem_chunk_alloc(sbus_request_vals);
+              request_val->cmd_code=tvb_get_guint8(tvb,10);
+              
+              if (((request_val->cmd_code) == 0xA1) || 
+                     ((request_val->cmd_code) == 0xA3)){
+                     request_val->count=((tvb_get_guint8(tvb,12))+1);
+              }
+              else {request_val->count=((tvb_get_guint8(tvb,11))+1);}
+              
+              /*Enter system info*/
+              if ((request_val->cmd_code) == 0xAB){
+                     request_val->sysinfo=(tvb_get_guint8(tvb,12));
+              }
+              else {request_val->sysinfo=0x0;}
+              
+              g_hash_table_insert(sbus_request_hash, new_request_key, request_val); 
+       }
+/* End of attaching data to hash table*/
+       
+/* Make entries in Protocol column and Info column on summary display */
+       if (check_col(pinfo->cinfo, COL_PROTOCOL)) 
+              col_set_str(pinfo->cinfo, COL_PROTOCOL, "S-Bus");
+
+       if (check_col(pinfo->cinfo, COL_INFO)) 
+              col_clear(pinfo->cinfo, COL_INFO);
+       offset = 0 ;
+
+       if (check_col(pinfo->cinfo, COL_INFO)) {
+       
+       
+/*            sbus_ack_code = tvb_get_ntohs(tvb,10);*/
+              switch (sbus_attribut){
+                     case SBUS_REQUEST:     
+                            sbus_cmd_code = tvb_get_guint8(tvb,10);
+                                          
+                            /* Special treatment of web server request 
+                             * as is is very helpful to see more information in the packetlist */
+                            if (sbus_cmd_code == 0xAF) {
+                                   sbus_web_aid = tvb_get_guint8(tvb,12);
+                                   sbus_web_seq = tvb_get_guint8(tvb, 13);
+                                   
+                                   col_add_fstr(pinfo->cinfo, COL_INFO,
+                                          "Web Server Request: %s (Seq No: %d)", 
+                                          val_to_str(sbus_web_aid,
+                                                 webserver_aid_vals, "Unknown Request!"), 
+                                                 sbus_web_seq);
+                            } else {
+                                   /* All other requests */
+                                   col_add_fstr(pinfo->cinfo, COL_INFO,
+                                          "Request: %s", val_to_str(sbus_cmd_code,
+                                          sbus_command_vals, "Unknown Command!"));
+                            }
+                            break;
+                                   
+                     case SBUS_RESPONSE:    
+                            /* Special treatment of web server request 
+                             * as is is very helpful to see more information in the packetlist */
+                            if (request_val && ((request_val->cmd_code) == 0xAF)) { 
+                                   sbus_web_aid = tvb_get_guint8(tvb,10);
+                                   col_add_fstr(pinfo->cinfo, COL_INFO,
+                                          "Response: %s (Seq No: %d)", 
+                                          val_to_str(sbus_web_aid,
+                                                 webserver_aid_vals, "Unknown Request!"), 
+                                          sbus_web_seq);
+       
+                            } else {
+                                   col_set_str(pinfo->cinfo, COL_INFO, "Response");
+                            }
+                            break;
+                                   
+                     case SBUS_ACKNAK:      
+                            sbus_ack_code = tvb_get_ntohs(tvb,9);
+                            col_add_fstr(pinfo->cinfo, COL_INFO,
+                                   "%s", val_to_str(sbus_ack_code,
+                                   sbus_ack_nak_vals, 
+                                   "Unknown NAK response code!"));
+                            break;
+                            
+                     default: 
+                            break;
+              }
+
+       }      
+/* create display subtree for the protocol */
+       if (tree) { 
+
+              ti = proto_tree_add_item(tree, proto_sbus, tvb, 0, -1, FALSE);
+
+              sbus_tree = proto_item_add_subtree(ti, ett_sbus);
+              
+/*Add subtree for Ether-S-Bus header*/
+              et = proto_tree_add_text(sbus_tree, tvb, 0, 8, "Ether-S-Bus header");
+              ethsbus_tree = proto_item_add_subtree(et, ett_sbus_ether);
+
+              sbus_version = tvb_get_guint8(tvb,0x4); /* move to where it has to go*/
+
+/* add an item to the subtree*/
+              sbus_eth_len = tvb_get_ntohl(tvb,offset);
+              proto_tree_add_item(ethsbus_tree,
+                  hf_sbus_length, tvb, offset, 4, FALSE); 
+                  offset += 4;
+
+              proto_tree_add_item(ethsbus_tree,
+                  hf_sbus_version, tvb, offset, 1, FALSE); 
+                  offset += 1;
+
+              proto_tree_add_item(ethsbus_tree,
+                  hf_sbus_protocol, tvb, offset, 1, FALSE); 
+                  offset += 1;
+
+              proto_tree_add_item(ethsbus_tree,
+                  hf_sbus_sequence, tvb, offset, 2, FALSE); 
+                  offset += 2;
+
+/* Continue adding stuff to the main tree*/
+              proto_tree_add_item(sbus_tree,
+                  hf_sbus_attribut, tvb, offset, 1, FALSE); 
+                  offset += 1;
+
+              sbus_attribut = tvb_get_guint8(tvb,8);
+              if (sbus_attribut == SBUS_REQUEST){
+                     interpreted = FALSE;
+                     proto_tree_add_item(sbus_tree,
+                         hf_sbus_dest, tvb, offset, 1, FALSE); 
+                         offset += 1;
+                     sbus_cmd_code = tvb_get_guint8(tvb,10);
+                     proto_tree_add_item(sbus_tree,
+                         hf_sbus_command, tvb, offset, 1, FALSE); 
+                         offset += 1;
+                            
+                     /*Read Counter, Register or Timer*/
+                     if ((sbus_cmd_code == 0x00) || (sbus_cmd_code == 0x06) || 
+                         (sbus_cmd_code == 0x07)){
+                            sbus_media_cnt = (tvb_get_guint8(tvb,11))+1;
+                            proto_tree_add_uint(sbus_tree,
+                                hf_sbus_rcount, tvb, offset, 1, sbus_media_cnt); 
+                                offset += 1;
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_addr_rtc, tvb, offset, 2, FALSE); 
+                                offset += 2;
+                                interpreted = TRUE;
+                            }
+                     /*Read Flag, Input or Output*/
+                     if ((sbus_cmd_code == 0x02) || (sbus_cmd_code == 0x03) || 
+                         (sbus_cmd_code == 0x05)){
+                            sbus_media_cnt = (tvb_get_guint8(tvb,11))+1;
+                            proto_tree_add_uint(sbus_tree,
+                                hf_sbus_rcount, tvb, offset, 1, sbus_media_cnt); 
+                                offset += 1;
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_addr_iof, tvb, offset, 2, FALSE); 
+                                offset += 2;
+                                interpreted = TRUE;
+                            }
+                     /*Write Register Timer Counter*/
+                     if ((sbus_cmd_code == 0x0A) || (sbus_cmd_code == 0x0E) || 
+                         (sbus_cmd_code == 0x0F)){
+                            sbus_media_cnt = (tvb_get_guint8(tvb,11));
+                            sbus_media_cnt = ((sbus_media_cnt - 1)/4);
+                            proto_tree_add_uint(sbus_tree,
+                                hf_sbus_wcount_calculated, tvb, offset,
+                                1, sbus_media_cnt);
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_wcount, tvb, offset, 1, FALSE);
+                                offset += 1;
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_addr_rtc, tvb, offset, 2, FALSE); 
+                                offset += 2;
+                            /*Add subtree for Data*/
+                            dt = proto_tree_add_text(sbus_tree, tvb, offset,
+                            ((sbus_media_cnt) * 4),"Data");
+                            
+                            sbusdata_tree = proto_item_add_subtree(dt, ett_sbus_data);
+                            for (i=((sbus_media_cnt)); i>0; i--){
+                                   proto_tree_add_item(sbusdata_tree,
+                                       hf_sbus_data_rtc, tvb, offset, 
+                                       4, FALSE); 
+                                       offset += 4;    
+                            
+                            }
+                            interpreted = TRUE;
+                     }
+                     /* Write flags and outputs*/
+                     if ((sbus_cmd_code == 0x0B) || (sbus_cmd_code == 0x0D)){
+                            sbus_media_cnt = (tvb_get_guint8(tvb,11));
+                            sbus_media_cnt = ((sbus_media_cnt - 2 ));
+                            sbus_fio_cnt = (tvb_get_guint8(tvb,14));
+                            sbus_fio_cnt = ((sbus_fio_cnt + 1 ));
+                            proto_tree_add_uint(sbus_tree,
+                                hf_sbus_wcount_calculated, tvb, offset,
+                                1, sbus_media_cnt);
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_wcount, tvb, offset, 1, FALSE);
+                                offset += 1;
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_addr_iof, tvb, offset, 2, FALSE); 
+                                offset += 2;
+                            proto_tree_add_uint(sbus_tree,
+                                hf_sbus_fio_count, tvb, offset, 1, sbus_fio_cnt); 
+                                offset += 1;                  
+                            /*Add subtree for Data*/
+                            dt = proto_tree_add_text(sbus_tree, tvb, offset,
+                            (sbus_media_cnt),"Data");
+                            
+                            sbusdata_tree = proto_item_add_subtree(dt, ett_sbus_data);
+                            for (i= sbus_media_cnt; i>0; i--){
+                            
+                                   sbus_helper = 1;
+                                   sbus_show_bin = 0;
+                                   sbus_binarymasked = 0x01; 
+                                   sbus_binaries = tvb_get_guint8(tvb, offset);
+                                   for (j=0; j<8; j++){
+                                          if ((sbus_binarymasked & sbus_binaries) != 0) {
+                                                 sbus_show_bin = (sbus_show_bin + sbus_helper);
+                                          }
+                                          sbus_binarymasked = sbus_binarymasked<<1;
+                                          sbus_helper = 10 * sbus_helper; 
+                                   }
+                            
+                            proto_tree_add_uint_format(sbusdata_tree,
+                                hf_sbus_data_iof, tvb, offset, 1, sbus_show_bin,
+                                "Binary data: %08u", sbus_show_bin); 
+                                offset += 1;
+                                
+                            }
+                            interpreted = TRUE;
+                     }
+                     /* Request: Write Real time clock*/
+                     if (sbus_cmd_code == 0x0C){
+                            sbus_helper = tvb_get_guint8(tvb, (offset +5));  /*hours*/
+                            sbus_helper1 = tvb_get_guint8(tvb, (offset +6)); /*minutes*/
+                            sbus_helper2 = tvb_get_guint8(tvb, (offset +7)); /*seconds*/
+                            proto_tree_add_text(sbus_tree, tvb, (offset +5), 3, 
+                                "Time (HH:MM:SS): %02x:%02x:%02x", sbus_helper, sbus_helper1, sbus_helper2);
+                            sbus_helper = tvb_get_guint8(tvb, (offset +2));  /*year*/
+                            sbus_helper1 = tvb_get_guint8(tvb, (offset +3)); /*month*/
+                            sbus_helper2 = tvb_get_guint8(tvb, (offset +4)); /*day*/
+                            proto_tree_add_text(sbus_tree, tvb, (offset +2), 3, 
+                                "Date (YY/MM/DD): %02x/%02x/%02x", sbus_helper, sbus_helper1, sbus_helper2);
+                            sbus_helper = tvb_get_guint8(tvb, (offset));  /*year-week*/
+                            sbus_helper1 = tvb_get_guint8(tvb, (offset +1)); /*week-day*/
+                            proto_tree_add_text(sbus_tree, tvb, offset, 2, 
+                                "Calendar week: %x, Week day: %x", sbus_helper, sbus_helper1);
+                            /*Add subtree for Data*/
+                            dt = proto_tree_add_text(sbus_tree, tvb, offset, 
+                            8, "Clock data");
+                            sbusdata_tree = proto_item_add_subtree(dt, ett_sbus_data);
+                            
+                            proto_tree_add_item(sbusdata_tree,
+                                hf_sbus_week_day, tvb, offset, 2, FALSE); 
+                                offset += 2;
+                            proto_tree_add_item(sbusdata_tree,
+                                hf_sbus_date, tvb, offset, 3, FALSE); 
+                                offset += 3;
+                            proto_tree_add_item(sbusdata_tree,
+                                hf_sbus_time, tvb, offset, 3, FALSE); 
+                                offset += 3;
+                                interpreted = TRUE;
+                     }
+                     
+                     
+                     /* Read user memory or program line*/
+                     if ((sbus_cmd_code == 0x1E) || (sbus_cmd_code == 0x1F)){
+                            sbus_media_cnt = (tvb_get_guint8(tvb,11))+1;
+                            proto_tree_add_uint(sbus_tree,
+                                hf_sbus_rcount, tvb, offset, 1, sbus_media_cnt); 
+                                offset += 1;
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_addr_prog, tvb, offset, 3, FALSE); 
+                                offset += 3;
+                                interpreted = TRUE;
+                     }
+                     
+                     /*Write user memory*/
+                     if (sbus_cmd_code == 0x23){
+                            sbus_media_cnt = (tvb_get_guint8(tvb,11));
+                            sbus_media_cnt = ((sbus_media_cnt - 2)/4);
+                            proto_tree_add_uint(sbus_tree,
+                                hf_sbus_wcount_calculated, tvb, offset,
+                                1, sbus_media_cnt);
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_wcount, tvb, offset, 1, FALSE);
+                                offset += 1;
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_addr_68k, tvb, offset, 3, FALSE); 
+                                offset += 3;
+                            /*Add subtree for Data*/
+                            dt = proto_tree_add_text(sbus_tree, tvb, offset,
+                            ((sbus_media_cnt) * 4),"Program lines");
+                            
+                            sbusdata_tree = proto_item_add_subtree(dt, ett_sbus_data);
+                            for (i=((sbus_media_cnt)); i>0; i--){
+                                   proto_tree_add_item(sbusdata_tree,
+                                       hf_sbus_data_rtc, tvb, offset, 
+                                       4, FALSE); 
+                                       offset += 4;    
+                            
+                            }
+                            interpreted = TRUE;
+                     }
+                     
+                     /* Read byte*/
+                     if (sbus_cmd_code == 0x47){
+                            sbus_media_cnt = (tvb_get_guint8(tvb,11))+1;
+                            proto_tree_add_uint(sbus_tree,
+                                hf_sbus_rcount, tvb, offset, 1, sbus_media_cnt); 
+                                offset += 1;
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_addr_68k, tvb, offset, 3, FALSE); 
+                                offset += 3;
+                                interpreted = TRUE;
+                     }
+                     
+                     /* Write byte */
+                     if (sbus_cmd_code == 0x51){
+                            sbus_media_cnt = (tvb_get_guint8(tvb,11));
+                            sbus_media_cnt = ((sbus_media_cnt - 2));
+                            proto_tree_add_uint(sbus_tree,
+                                hf_sbus_wcount_calculated, tvb, offset,
+                                1, sbus_media_cnt);
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_wcount, tvb, offset, 1, FALSE);
+                                offset += 1;
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_addr_68k, tvb, offset, 3, FALSE); 
+                                offset += 3;
+                            /*Add subtree for Data*/
+                            dt = proto_tree_add_text(sbus_tree, tvb, offset,
+                            ((sbus_media_cnt) * 4),"Data (bytes)");
+                            
+                            sbusdata_tree = proto_item_add_subtree(dt, ett_sbus_data);
+                            for (i=((sbus_media_cnt)); i>0; i--){
+                                   proto_tree_add_item(sbusdata_tree,
+                                       hf_sbus_data_byte, tvb, offset, 
+                                       1, FALSE); 
+                                       offset += 1;    
+                            }
+                            interpreted = TRUE;
+                     }
+                                          
+                     /*Read EEPROM register*/
+                     if (sbus_cmd_code == 0xA1){
+                            sbus_media_cnt = (tvb_get_guint8(tvb,12))+1;
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_command_extension, tvb, offset, 1, FALSE); 
+                                offset += 1;
+                            proto_tree_add_uint(sbus_tree,
+                                hf_sbus_rcount, tvb, offset, 1, sbus_media_cnt); 
+                                offset += 1;
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_addr_eeprom, tvb, offset, 2, FALSE); 
+                                offset += 2;
+                                interpreted = TRUE;
+                     }
+              
+                     /*Request for reading system info*/
+                     if (sbus_cmd_code == 0xAB){    /* Syinfo 05 is not implemented as no serial baud is possible*/
+                            sbus_sysinfo_number = (tvb_get_guint8(tvb,13));
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_sysinfo_nr, tvb, offset, 1, FALSE); 
+                                offset += 1;
+                            sbus_sysinfo_number = (tvb_get_guint8(tvb,14));
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_sysinfo_nr, tvb, offset, 1, FALSE); 
+                                offset += 1;
+                                interpreted = TRUE;
+                     }
+                     
+                     /* WebServer Request */
+                     if (sbus_cmd_code == 0xAF) {
+                            sbus_web_size = tvb_get_guint8(tvb,11);
+                            sbus_web_aid = tvb_get_guint8(tvb,12);
+                            sbus_web_seq = tvb_get_guint8(tvb,13);
+                            
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_web_size, tvb, offset,
+                                1, sbus_web_size);
+                            offset += 1;
+
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_web_aid, tvb, offset,
+                                1, sbus_web_aid);
+                            offset += 1;
+
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_web_seq, tvb, offset,
+                                1, sbus_web_seq);
+                            offset += 1;
+                            
+                            if (sbus_web_size > 1) {
+                                   dt = proto_tree_add_text(sbus_tree, tvb, offset,
+                                          (sbus_web_size - 1),"Data (bytes)");
+                                   
+                                   sbusdata_tree = proto_item_add_subtree(dt, ett_sbus_data);
+                                   for (i=sbus_web_size -1 ; i>0; i--){
+                                          proto_tree_add_item(sbusdata_tree,
+                                              hf_sbus_data_byte, tvb, offset, 
+                                              1, FALSE); 
+                                          offset += 1;    
+                                   }      
+                            }
+                            interpreted = TRUE;
+                     }
+
+/*Inform that command was not dissected and add remaining length*/
+                     if ((interpreted == FALSE) && (sbus_eth_len > 13)){ /*13 bytes is the minimal length of a request telegram...*/
+                            sbus_helper = sbus_eth_len - (offset + 2);
+                            proto_tree_add_text(sbus_tree, tvb, offset, sbus_helper, 
+                                "This telegram isn't implemented in the dissector.");
+                            offset = offset + sbus_helper; 
+                     }
+              }
+
+/* Response dissection*/
+              if (request_val && sbus_attribut == SBUS_RESPONSE) {
+                     interpreted = FALSE;
+                     /* Response: 32 bit values*/
+                     if (((request_val->cmd_code) == 0x00) || /*32 bit vals (R,T,C)*/
+                            ((request_val->cmd_code) == 0x06) ||
+                            ((request_val->cmd_code) == 0x07) ||
+                            ((request_val->cmd_code) == 0x1E) || /* User Memory    */
+                            ((request_val->cmd_code) == 0x1F) || /* Program line    */
+                            ((request_val->cmd_code) == 0xA1)){  /* EEPROM register*/
+
+                            /*Add subtree for Data*/
+                            dt = proto_tree_add_text(sbus_tree, tvb, offset,
+                            ((request_val->count) * 4),"Data");
+/*printf("Debug5\n");*/        
+                            sbusdata_tree = proto_item_add_subtree(dt, ett_sbus_data);
+/*printf("Debug6\n");*/
+                            for (i=(request_val->count); i>0; i--){
+
+                                   proto_tree_add_item(sbusdata_tree,
+                                       hf_sbus_data_rtc, tvb, offset, 
+                                       4, FALSE); 
+                                       offset += 4;
+                            }
+                            interpreted = TRUE;
+                     }
+                     /* Response: PCD Display register*/
+                     if ((request_val->cmd_code) == 0x01){
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_display_register, tvb, offset, 4, FALSE); 
+                            offset += 4;
+                            interpreted = TRUE;
+                     }
+                     /* Add binary data I, O, F*/
+                     if (((request_val->cmd_code) == 0x02) ||
+                            ((request_val->cmd_code) == 0x03) ||
+                            ((request_val->cmd_code) == 0x05)){
+                            
+                            /*Add subtree for Data*/
+                            dt = proto_tree_add_text(sbus_tree, tvb, offset, 
+                            (((request_val->count) + 7) / 8), "Data");
+                            sbusdata_tree = proto_item_add_subtree(dt, ett_sbus_data);
+                            
+                            for (i=(((request_val->count) + 7) / 8); i>0; i--){
+                            
+                                   sbus_helper = 1;
+                                   sbus_show_bin = 0;
+                                   sbus_binarymasked = 0x01; 
+                                   sbus_binaries = tvb_get_guint8(tvb, offset);
+                                   for (j=0; j<8; j++){
+                                          if ((sbus_binarymasked & sbus_binaries) != 0) {
+                                                 sbus_show_bin = (sbus_show_bin + sbus_helper);
+                                          }
+                                          sbus_binarymasked = sbus_binarymasked<<1;
+                                          sbus_helper = 10 * sbus_helper; 
+                                   }
+                            
+                            proto_tree_add_uint_format(sbusdata_tree,
+                                hf_sbus_data_iof, tvb, offset, 1, sbus_show_bin,
+                                "Binary data: %08u", sbus_show_bin); 
+                                offset += 1;
+                            }
+                            interpreted = TRUE;
+                     }
+                     
+                     /* Response: Real time clock value*/
+                     if ((request_val->cmd_code) == 0x04){  
+                            sbus_helper = tvb_get_guint8(tvb, (offset +5));  /*hours*/
+                            sbus_helper1 = tvb_get_guint8(tvb, (offset +6)); /*minutes*/
+                            sbus_helper2 = tvb_get_guint8(tvb, (offset +7)); /*seconds*/
+                            proto_tree_add_text(sbus_tree, tvb, (offset +5), 3, 
+                                "Time (HH:MM:SS): %02x:%02x:%02x", sbus_helper, sbus_helper1, sbus_helper2);
+                            sbus_helper = tvb_get_guint8(tvb, (offset +2));  /*year*/
+                            sbus_helper1 = tvb_get_guint8(tvb, (offset +3)); /*month*/
+                            sbus_helper2 = tvb_get_guint8(tvb, (offset +4)); /*day*/
+                            proto_tree_add_text(sbus_tree, tvb, (offset +2), 3, 
+                                "Date (YY/MM/DD): %02x/%02x/%02x", sbus_helper, sbus_helper1, sbus_helper2);
+                            sbus_helper = tvb_get_guint8(tvb, (offset));  /*year-week*/
+                            sbus_helper1 = tvb_get_guint8(tvb, (offset +1)); /*week-day*/
+                            proto_tree_add_text(sbus_tree, tvb, offset, 2, 
+                                "Calendar week: %x, Week day: %x", sbus_helper, sbus_helper1);
+                            /*Add subtree for Data*/
+                            dt = proto_tree_add_text(sbus_tree, tvb, offset, 
+                            8, "Clock data");
+                            sbusdata_tree = proto_item_add_subtree(dt, ett_sbus_data);
+                            
+                            proto_tree_add_item(sbusdata_tree,
+                                hf_sbus_week_day, tvb, offset, 2, FALSE); 
+                                offset += 2;
+                            proto_tree_add_item(sbusdata_tree,
+                                hf_sbus_date, tvb, offset, 3, FALSE); 
+                                offset += 3;
+                            proto_tree_add_item(sbusdata_tree,
+                                hf_sbus_time, tvb, offset, 3, FALSE); 
+                                offset += 3;
+                            interpreted = TRUE;
+                     }
+                     
+                     /* Response: CPU status*/
+                     if (((request_val->cmd_code) > 0x13) &&
+                            ((request_val->cmd_code) < 0x1C)){
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_cpu_status, tvb, offset, 1, FALSE); 
+                            offset += 1;
+                            interpreted = TRUE;
+                     }
+                     
+                     /* Response: Station address*/
+                     if (((request_val->cmd_code) == 0x1D)){
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_address, tvb, offset, 1, FALSE); 
+                            offset += 1;
+                            interpreted = TRUE;
+                     }
+                     
+                     /* Response: Firmware version */
+                     if (((request_val->cmd_code) == 0x20)){
+                            /*PCD type*/
+                            tmp_string = tvb_get_string(tvb, offset, 5);
+                            proto_tree_add_string(sbus_tree,
+                                hf_sbus_cpu_type, tvb, offset, 5, tmp_string);
+                                offset += 5; 
+                            g_free(tmp_string);
+                            /*FW version*/
+                            tmp_string = tvb_get_string(tvb , offset, 3);
+                            proto_tree_add_string(sbus_tree,
+                                hf_sbus_fw_version, tvb, offset, 3, tmp_string);
+                                offset += 4;
+                            g_free(tmp_string);
+                            interpreted = TRUE;
+                     }
+                     
+                     /* Response for Status Flags*/
+                     if ((request_val->cmd_code) == 0x46){
+                            
+                            /*Add subtree for Data*/
+                            dt = proto_tree_add_text(sbus_tree, tvb, offset,
+                            1,"ACCU and arithmetic status");
+                            sbusdata_tree = proto_item_add_subtree(dt, ett_sbus_data);
+                            
+                            proto_tree_add_item(sbusdata_tree, hf_sbus_flags_accu,
+                                tvb, offset, 1, FALSE);
+                            proto_tree_add_item(sbusdata_tree, hf_sbus_flags_error,
+                                tvb, offset, 1, FALSE);
+                            proto_tree_add_item(sbusdata_tree, hf_sbus_flags_negative,
+                                tvb, offset, 1, FALSE);
+                            proto_tree_add_item(sbusdata_tree, hf_sbus_flags_zero,
+                                tvb, offset, 1, FALSE);
+                            offset +=1;
+                            interpreted = TRUE;
+                     }
+                     
+                     /* Response for Read byte */
+                     if ((request_val->cmd_code) == 0x47){
+                            
+                            /*Add subtree for Data*/
+                            dt = proto_tree_add_text(sbus_tree, tvb, offset,
+                            (request_val->count),"Data (bytes)");
+                            
+                            sbusdata_tree = proto_item_add_subtree(dt, ett_sbus_data);
+                            for (i=(request_val->count); i>0; i--){
+                                   proto_tree_add_item(sbusdata_tree,
+                                       hf_sbus_data_byte, tvb, offset, 
+                                       1, FALSE); 
+                                       offset += 1;
+                            }
+                            interpreted = TRUE;
+                     }
+                     
+                     /* Response for Read Index register */
+                     if ((request_val->cmd_code) == 0x49){
+                            
+                            /*Add subtree for Data*/
+                            dt = proto_tree_add_text(sbus_tree, tvb, offset,
+                            2,"Data (hex bytes)");
+                            
+                            sbusdata_tree = proto_item_add_subtree(dt, ett_sbus_data);
+                            for (i=0; i<2; i++){ /*2 bytes*/
+                                   proto_tree_add_item(sbusdata_tree,
+                                       hf_sbus_data_byte_hex, tvb, offset, 
+                                       1, FALSE); 
+                                       offset += 1;
+                            }
+                            interpreted = TRUE;
+                     }
+                     
+                     /* Response: Instruction pointer*/
+                     if (((request_val->cmd_code) == 0x4A)){
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_addr_prog, tvb, offset, 3, FALSE); 
+                            offset += 3;
+                            interpreted = TRUE;
+                     }
+                     
+                     /*Response for Find History*/
+                     if (((request_val->cmd_code) == 0x4B)){
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_addr_68k, tvb, offset, 3, FALSE); 
+                                offset += 3;
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_nbr_elements, tvb, offset, 2, FALSE); 
+                            offset += 2;
+                            interpreted = TRUE;
+                     }
+                     
+                     /* Response: Read current block*/
+                     if (((request_val->cmd_code) == 0x9D)){
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_block_type, tvb, offset, 1, FALSE); 
+                                offset += 1;
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_block_nr, tvb, offset, 2, FALSE); 
+                                offset += 2;
+                            interpreted = TRUE;
+                     }
+
+                     /* Response: Read system infomation (without interpretation of module info)*/
+                     if (((request_val->cmd_code) == 0xAB)){
+                            if (((request_val->sysinfo) == 0x00)){ /*sysinfo 0*/
+                                   offset +=1; /* this byte is always 0x01*/
+                                   /*Add subtree for Data*/
+                                   dt = proto_tree_add_text(sbus_tree, tvb, offset,
+                                   1,"System info");
+                                   sbusdata_tree = proto_item_add_subtree(dt, ett_sbus_data);
+                                   
+                                   proto_tree_add_item(sbusdata_tree, hf_sbus_sysinfo0_1,
+                                       tvb, offset, 1, FALSE);
+                                   proto_tree_add_item(sbusdata_tree, hf_sbus_sysinfo0_2,
+                                       tvb, offset, 1, FALSE);
+                                   proto_tree_add_item(sbusdata_tree, hf_sbus_sysinfo0_3,
+                                       tvb, offset, 1, FALSE);
+                                   proto_tree_add_item(sbusdata_tree, hf_sbus_sysinfo0_4,
+                                       tvb, offset, 1, FALSE);
+                                   proto_tree_add_item(sbusdata_tree, hf_sbus_sysinfo0_5,
+                                       tvb, offset, 1, FALSE);
+                                   offset +=1;
+                                   interpreted = TRUE;
+                            }
+                     }
+                     
+                     /* Response: Webserver request */
+                     if (((request_val->cmd_code) == 0xAF)) {
+                            sbus_web_size = tvb_get_guint8(tvb, 9);
+                            sbus_web_aid = tvb_get_guint8(tvb,10);
+                            sbus_web_seq = tvb_get_guint8(tvb,11);
+                     
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_web_size, tvb, offset,
+                                1, sbus_web_size);
+                            offset += 1;
+                            
+                            proto_tree_add_item(sbus_tree,
+                                hf_sbus_web_aid, tvb, offset,
+                                1, sbus_web_aid);
+                            offset += 1;
+
+                            if (sbus_web_size > 1) {
+                                   proto_tree_add_item(sbus_tree,
+                                       hf_sbus_web_seq, tvb, offset,
+                                       1, sbus_web_seq);
+                                   offset += 1;
+                            
+                                   dt = proto_tree_add_text(sbus_tree, tvb, offset,
+                                   (sbus_web_size - 2),"Data (bytes)");
+                            
+                                   sbusdata_tree = proto_item_add_subtree(dt, ett_sbus_data);
+                                   for (i=sbus_web_size - 2 ; i>0; i--){
+                                          proto_tree_add_item(sbusdata_tree,
+                                              hf_sbus_data_byte, tvb, offset, 
+                                              1, FALSE); 
+                                           offset += 1;    
+                                   }
+                            }
+                            interpreted = TRUE;
+                     }
+                     
+                     /*Inform that response was not dissected and add remaining length*/
+                     if (interpreted == FALSE){
+                            sbus_helper = sbus_eth_len - (offset + 2);
+                            proto_tree_add_text(sbus_tree, tvb, offset, sbus_helper, 
+                                "This telegram isn't implemented in the dissector.");
+                            offset = offset + sbus_helper;
+                     }                    
+              }
+              
+              if (sbus_attribut == SBUS_ACKNAK){
+                     proto_tree_add_item(sbus_tree,
+                         hf_sbus_acknackcode, tvb, offset, 2, FALSE); 
+                         offset += 2;
+              }
+              
+              /* Calclulate CRC */
+              sbus_crc_calc = 0;
+              for (i = 0; i < sbus_eth_len - 2; i++)
+                     sbus_crc_calc = crc_calc (sbus_crc_calc, tvb_get_guint8(tvb, i));
+              /*Show CRC and add hidden item for wrong CRC*/
+              sbus_helper = tvb_get_ntohs(tvb, offset);
+              if (sbus_helper == sbus_crc_calc){
+                     proto_tree_add_uint_format(sbus_tree,
+                         hf_sbus_crc, tvb, offset, 2, sbus_helper, 
+                          "Checksum: 0x%04x (correct)", sbus_helper);
+                     }
+              else {
+                     proto_tree_add_uint_format(sbus_tree,
+                         hf_sbus_crc, tvb, offset, 2, sbus_helper, 
+                          "Checksum: 0x%04x (NOT correct)", sbus_helper);
+                     proto_tree_add_boolean_hidden(sbus_tree, 
+                         hf_sbus_crc_bad, tvb, offset + 2, 2, TRUE);
+              }
+              offset += 2; /*now at the end of the telegram*/
+       }
+/*End of dissect_sbus*/
+}
+
+/* Register the protocol with Ethereal */
+
+void
+proto_register_sbus(void)
+{                 
+
+/* Setup list of header fields  See Section 1.6.1 for details*/
+       static hf_register_info hf[] = {              
+              { &hf_sbus_length,
+                     { "Length (bytes)",           "sbus.len",
+                     FT_UINT32, BASE_DEC, NULL, 0,           
+                     "SAIA Ether-S-Bus telegram length", HFILL }
+              },
+              { &hf_sbus_version,
+                     { "Version",           "sbus.vers",
+                     FT_UINT8, BASE_DEC, NULL, 0,           
+                     "SAIA Ether-S-Bus version", HFILL }
+              },
+              { &hf_sbus_protocol,
+                     { "Protocol type",           "sbus.proto",
+                     FT_UINT8, BASE_DEC, NULL, 0,           
+                     "SAIA Ether-S-Bus protocol type", HFILL }
+              },
+              { &hf_sbus_sequence,
+                     { "Sequence",           "sbus.seq",
+                     FT_UINT16, BASE_DEC, NULL, 0,           
+                     "SAIA Ether-S-Bus sequence number", HFILL }
+              },
+
+              { &hf_sbus_attribut,
+                     { "Telegram attribute",           "sbus.att",
+                     FT_UINT8, BASE_HEX, VALS(sbus_att_vals), 0,           
+                     "SAIA Ether-S-Bus telegram attribute, indicating type of telegram", HFILL }
+              },
+
+              { &hf_sbus_dest,
+                     { "Destination",           "sbus.destination",
+                     FT_UINT8, BASE_DEC, NULL, 0,           
+                     "SAIA S-Bus destination address", HFILL }
+              },
+              
+              { &hf_sbus_address,
+                     { "S-Bus address",           "sbus.address",
+                     FT_UINT8, BASE_DEC, NULL, 0,           
+                     "SAIA S-Bus station address", HFILL }
+              },
+              
+              { &hf_sbus_command,
+                     { "Command",           "sbus.cmd",
+                     FT_UINT8, BASE_HEX, VALS(sbus_command_vals), 0,           
+                     "SAIA S-Bus command", HFILL }
+              },
+
+              { &hf_sbus_command_extension,
+                     { "Command extension",           "sbus.cmd_extn",
+                     FT_UINT8, BASE_HEX, NULL, 0,           
+                     "SAIA S-Bus command extension", HFILL }
+              },
+       
+              { &hf_sbus_rcount,
+                     { "R-count",           "sbus.rcount",
+                     FT_UINT8, BASE_DEC, NULL, 0,           
+                     "Number of elements expected in response", HFILL }
+              },
+              
+              { &hf_sbus_wcount,
+                     { "W-count (raw)",           "sbus.wcount",
+                     FT_UINT8, BASE_DEC, NULL, 0,           
+                     "Number of bytes to be written", HFILL }
+              },
+
+              { &hf_sbus_wcount_calculated,
+                     { "W-count (32 bit values)",           "sbus.wcount_calc",
+                     FT_UINT8, BASE_DEC, NULL, 0,           
+                     "Number of elements to be written", HFILL }
+              },
+
+              { &hf_sbus_fio_count,
+                     { "FIO Count (amount of bits)",           "sbus.fio_count",
+                     FT_UINT8, BASE_DEC, NULL, 0,           
+                     "Number of binary elements to be written", HFILL }
+              },
+              
+                            
+              { &hf_sbus_addr_rtc,
+                     { "Base address RTC",           "sbus.addr_RTC",
+                     FT_UINT16, BASE_DEC, NULL, 0,           
+                     "Base address of 32 bit elements to read", HFILL }
+              },
+              
+              { &hf_sbus_addr_iof,
+                     { "Base address IOF",           "sbus.addr_IOF",
+                     FT_UINT16, BASE_DEC, NULL, 0,           
+                     "Base address of binary elements to read", HFILL }
+              },
+              
+              { &hf_sbus_addr_eeprom,
+                     { "Base address of EEPROM register",           "sbus.addr_EEPROM",
+                     FT_UINT16, BASE_DEC, NULL, 0,           
+                     "Base address of 32 bit EEPROM register to read or write", HFILL }
+              },
+              
+              { &hf_sbus_addr_prog,
+                     { "Base address of user memory or program lines",           "sbus.addr_prog",
+                     FT_UINT24, BASE_DEC, NULL, 0,           
+                     "Base address of the user memory or program lines (read or write)", HFILL }
+              },
+              
+              { &hf_sbus_addr_68k,
+                     { "Base address of bytes",           "sbus.addr_prog",
+                     FT_UINT24, BASE_HEX, NULL, 0,           
+                     "Base address of bytes to read or write (68k address)", HFILL }
+              },
+              
+              { &hf_sbus_block_type,
+                     { "Block type",           "sbus.block_type",
+                     FT_UINT8, BASE_HEX, VALS(sbus_block_types), 0,           
+                     "Program block type read", HFILL }
+              },
+              
+              { &hf_sbus_block_nr,
+                     { "Block/Element nr",           "sbus.block_nr",
+                     FT_UINT16, BASE_DEC, NULL, 0,           
+                     "Program block / DatatBlock number", HFILL }
+              },
+              
+              { &hf_sbus_nbr_elements,
+                     { "Number of elements",           "sbus.nbr_elements",
+                     FT_UINT16, BASE_DEC, NULL, 0,           
+                     "Number of elements or characters", HFILL }
+              },
+              
+                            
+              { &hf_sbus_display_register,
+                     { "PCD Display register",      "sbus.data_display_register",
+                     FT_UINT32, BASE_DEC, NULL, 0,           
+                     "The PCD display register (32 bit value)", HFILL }
+              },
+              
+              { &hf_sbus_data_rtc,
+                     { "S-Bus 32-bit data",      "sbus.data_rtc",
+                     FT_UINT32, BASE_DEC, NULL, 0,           
+                     "One regiser/timer of counter (32 bit value)", HFILL }
+              },
+              
+              { &hf_sbus_data_byte,
+                     { "Data bytes",      "sbus.data_byte",
+                     FT_UINT8, BASE_DEC, NULL, 0,           
+                     "One byte from PCD", HFILL }
+              },
+              
+              { &hf_sbus_data_byte_hex,
+                     { "Data bytes (hex)",      "sbus.data_byte_hex",
+                     FT_UINT8, BASE_HEX, NULL, 0,           
+                     "One byte from PCD (hexadecimal)", HFILL }
+              },
+              
+              { &hf_sbus_data_iof,
+                     { "S-Bus binary data",      "sbus.data_iof",
+                     FT_UINT32, BASE_DEC, NULL, 0,           
+                     "8 binaries", HFILL }
+              },
+              
+              { &hf_sbus_cpu_type,
+                     { "PCD type",      "sbus.pcd_type",
+                     FT_STRING, BASE_NONE, NULL, 0,
+                     "PCD type (short form)", HFILL }
+              },
+              
+              { &hf_sbus_fw_version,
+                     { "Firmware version",      "sbus.fw_version",
+                     FT_STRING, BASE_NONE, NULL, 0,
+                     "Firmware version of the PCD or module", HFILL }
+              },
+              
+              { &hf_sbus_sysinfo_nr,
+                     { "System information number",           "sbus.sysinfo",
+                     FT_UINT8, BASE_HEX, NULL, 0,           
+                     "System information number (extension to command code)", HFILL }
+              },
+              
+              { &hf_sbus_sysinfo0_1,
+                     { "Mem size info",      "sbus.sysinfo0.mem",
+                     FT_BOOLEAN, 8, TFS(&tfs_sbus_present), F_MEMSIZE,           
+                     "Availability of memory size information", HFILL }
+              },
+              { &hf_sbus_sysinfo0_2,
+                     { "Trace buffer",      "sbus.sysinfo0.trace",
+                     FT_BOOLEAN, 8, TFS(&tfs_sbus_present), F_TRACE,           
+                     "Availability of trace buffer feature", HFILL }
+              },
+              { &hf_sbus_sysinfo0_3,
+                     { "Slot B1",      "sbus.sysinfo0.b1",
+                     FT_BOOLEAN, 8, TFS(&tfs_sbus_present), F_INFO_B1,           
+                     "Presence of EEPROM information on slot B1", HFILL }
+              },
+              { &hf_sbus_sysinfo0_4,
+                     { "Slot B2",      "sbus.sysinfo0.b2",
+                     FT_BOOLEAN, 8, TFS(&tfs_sbus_present), F_INFO_B2,           
+                     "Presence of EEPROM information on slot B2", HFILL }
+              },
+              { &hf_sbus_sysinfo0_5,
+                     { "PGU baud",      "sbus.sysinfo0.pgubaud",
+                     FT_BOOLEAN, 8, TFS(&tfs_sbus_present), F_PGU_BAUD,           
+                     "Availability of PGU baud switch feature", HFILL }
+              },
+              
+              { &hf_sbus_sysinfo_length,
+                     { "System information length",           "sbus.sysinfo_length",
+                     FT_UINT8, BASE_HEX, NULL, 0,           
+                     "System information length in response", HFILL }
+              },
+              
+              { &hf_sbus_f_module_type,
+                     { "F-module type",      "sbus.fmodule_type",
+                     FT_STRING, BASE_NONE, NULL, 0,
+                     "Module type mounted on B1/2 slot", HFILL }
+              },
+              
+              { &hf_sbus_harware_version,
+                     { "Hardware version",      "sbus.hw_version",
+                     FT_STRING, BASE_NONE, NULL, 0,
+                     "Hardware version of the PCD or the module", HFILL }
+              },
+              
+              { &hf_sbus_hardware_modification,
+                     { "Hardware modification",      "sbus.hw_modification",
+                     FT_UINT8, BASE_DEC, NULL, 0,           
+                     "Hardware modification of the PCD or module", HFILL }
+              },
+       
+              { &hf_sbus_various,
+                     { "Varous data",      "sbus.various",
+                     FT_NONE, BASE_NONE, NULL, 0,           
+                     "Various data contained in telegrams but nobody will search for it", HFILL }
+              },
+              
+              
+              { &hf_sbus_acknackcode,
+                     { "ACK/NAK code",      "sbus.nakcode",
+                     FT_UINT16, BASE_HEX, VALS(sbus_ack_nak_vals), 0,           
+                     "SAIA S-Bus ACK/NAK response", HFILL }
+              },
+              
+              { &hf_sbus_cpu_status,
+                     { "CPU status",      "sbus.CPU_status",
+                     FT_UINT8, BASE_HEX, VALS(sbus_CPU_status), 0,           
+                     "SAIA PCD CPU status", HFILL }
+              },
+              
+              
+              { &hf_sbus_week_day,
+                     { "RTC calendar week and week day",           "sbus.rtc.week_day",
+                     FT_UINT16, BASE_HEX, NULL, 0,           
+                     "Calendar week and week day number of the real time clock", HFILL }
+              },
+
+              { &hf_sbus_date,
+                     { "RTC date (YYMMDD)",           "sbus.rtc.date",
+                     FT_UINT24, BASE_HEX, NULL, 0,           
+                     "Year, month and day of the real time clock", HFILL }
+              },
+              
+              { &hf_sbus_time,
+                     { "RTC time (HHMMSS)",           "sbus.rtc.time",
+                     FT_UINT24, BASE_HEX, NULL, 0,           
+                     "Time of the real time clock", HFILL }
+              },
+              
+              { &hf_sbus_web_size,
+                     { "Web server packet size",      "sbus.web.size",
+                     FT_UINT8, BASE_HEX, NULL, 0,           
+                     "Web server packet size", HFILL }
+              },
+                     
+              { &hf_sbus_web_aid,
+                     { "AID",      "sbus.web.aid",
+                     FT_UINT8, BASE_HEX, NULL, 0,           
+                     "Web server command/status code (AID)", HFILL }
+              },
+                     
+              { &hf_sbus_web_seq,
+                     { "Sequence",      "sbus.web.seq",
+                     FT_UINT8, BASE_HEX, NULL, 0,           
+                     "Web server sequence nr (PACK_N)", HFILL }
+              },
+
+              { &hf_sbus_crc,
+                     { "Checksum",      "sbus.crc",
+                     FT_UINT16, BASE_HEX, NULL, 0,           
+                     "CRC 16", HFILL }
+              },
+
+              { &hf_sbus_crc_bad,
+                     { "Bad Checksum",      "sbus.crc_bad", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
+                     "A bad checksum in the telegram", HFILL }},                  
+              
+              { &hf_sbus_flags_accu,
+                     { "ACCU", "sbus.flags.accu",
+                     FT_BOOLEAN, 8, TFS(&tfs_sbus_flags), F_ACCU,
+                     "PCD Accumulator", HFILL }
+              },
+              
+              { &hf_sbus_flags_error,
+                     { "Error flag", "sbus.flags.error",
+                     FT_BOOLEAN, 8, TFS(&tfs_sbus_flags), F_ERROR,
+                     "PCD error flag", HFILL }
+              },
+              
+              { &hf_sbus_flags_negative,
+                     { "N-flag", "sbus.flags.nflag",
+                     FT_BOOLEAN, 8, TFS(&tfs_sbus_flags), F_NEGATIVE,
+                     "Negative status flag", HFILL }
+              },
+              
+              { &hf_sbus_flags_zero,
+                     { "Z-flag", "sbus.flags.zflag",
+                     FT_BOOLEAN, 8, TFS(&tfs_sbus_flags), F_ZERO,
+                     "Zero status flag", HFILL }
+              },
+       };
+
+/* Setup protocol subtree array */
+       static gint *ett[] = {
+              &ett_sbus,
+              &ett_sbus_ether,
+              &ett_sbus_data,
+       };
+
+/* Register the protocol name and description */
+       proto_sbus = proto_register_protocol("SAIA S-Bus",
+           "SBUS", "sbus");
+
+/* Required function calls to register the header fields and subtrees used */
+       proto_register_field_array(proto_sbus, hf, array_length(hf));
+       proto_register_subtree_array(ett, array_length(ett));
+        register_init_routine(&sbus_init_protocol);
+/* Register preferences module (See Section 2.6 for more on preferences)        
+        sbus_module = prefs_register_protocol(proto_sbus, proto_reg_handoff_sbus);*/
+     
+/* Register a sample preference         
+        prefs_register_bool_preference(sbus_module, "showHex", 
+             "Display numbers in Hex",
+            "Enable to display numerical values in hexidecimal.",
+            &gPREF_HEX );      */  
+}
+ 
+void
+proto_reg_handoff_sbus(void)
+{
+/*
+        static gboolean inited = FALSE;
+        
+        if( !inited ) {
+*/
+       dissector_handle_t sbus_handle;
+
+       sbus_handle = create_dissector_handle(dissect_sbus,
+           proto_sbus);
+       dissector_add("udp.port", 5050, sbus_handle);
+        
+        /*inited = TRUE;
+        }*/
+ 
+}
+
+/* Stuff to register the dissector when it's used as a dll or shared library */
+#ifndef ENABLE_STATIC
+G_MODULE_EXPORT void
+plugin_register(void)
+{
+       static int inited = 0;
+       
+       /* register the sbus protocol, protocol fields, and subtrees */
+       if (proto_sbus == -1 ) {  /*was !inited before CD051017*/
+              /* execute protocol initialization only once */
+              proto_register_sbus();
+              inited = 1;
+       }
+}
+
+G_MODULE_EXPORT void
+plugin_reg_handoff(void)
+{
+       proto_reg_handoff_sbus();
+}
+#endif
+
Index: /ethereal/plugins/sbus/AUTHORS
===================================================================
--- /ethereal/plugins/sbus/AUTHORS        (revision 0)
+++ /ethereal/plugins/sbus/AUTHORS        (revision 0)
@@ -0,0 +1,3 @@
+Author :
+Christian Durrer <christian.durrer@xxxxxxxxxxxx>
+
Index: /ethereal/plugins/sbus/ChangeLog
===================================================================
--- /ethereal/plugins/sbus/ChangeLog      (revision 0)
+++ /ethereal/plugins/sbus/ChangeLog      (revision 0)
@@ -0,0 +1,2 @@
+$Id: ChangeLog 11400 2004-07-18 00:24:25Z guy $
+ 
Index: /ethereal/plugins/sbus/Makefile.nmake
===================================================================
--- /ethereal/plugins/sbus/Makefile.nmake (revision 0)
+++ /ethereal/plugins/sbus/Makefile.nmake (revision 0)
@@ -0,0 +1,31 @@
+#
+# $Id: Makefile.nmake 13596 2005-03-05 06:28:10Z lroland $
+#
+
+include ..\..\config.nmake
+
+############### no need to modify below this line #########
+
+CFLAGS=/DHAVE_CONFIG_H /I../.. /I../../wiretap $(GLIB_CFLAGS) \
+       /I$(PCAP_DIR)\include -D_U_="" $(LOCAL_CFLAGS)
+
+LDFLAGS = /NOLOGO /INCREMENTAL:no /MACHINE:I386 $(LOCAL_LDFLAGS)
+
+!IFDEF ENABLE_LIBETHEREAL
+LINK_PLUGIN_WITH=..\..\epan\libethereal.lib
+CFLAGS=/DHAVE_WIN32_LIBETHEREAL_LIB /D_NEED_VAR_IMPORT_ $(CFLAGS)
+
+OBJECTS=packet-sbus.obj 
+
+sbus.dll sbus.exp sbus.lib : $(OBJECTS) $(LINK_PLUGIN_WITH)
+       link -dll /out:sbus.dll $(LDFLAGS) $(OBJECTS) $(LINK_PLUGIN_WITH) \
+       $(GLIB_LIBS)
+
+!ENDIF
+
+clean:
+       rm -f $(OBJECTS) sbus.dll sbus.exp sbus.lib *.pdb
+
+distclean: clean
+
+maintainer-clean: distclean
Index: /ethereal/plugins/sbus/moduleinfo.h
===================================================================
--- /ethereal/plugins/sbus/moduleinfo.h   (revision 0)
+++ /ethereal/plugins/sbus/moduleinfo.h   (revision 0)
@@ -0,0 +1,17 @@
+/* Included *after* config.h, in order to re-define these macros */
+
+#ifdef PACKAGE
+#undef PACKAGE
+#endif
+
+/* Name of package */
+#define PACKAGE "sbus"
+
+
+#ifdef VERSION
+#undef VERSION
+#endif
+
+/* Version number of package */
+#define VERSION "0.0.4"
+
Index: /ethereal/plugins/sbus/COPYING
===================================================================
--- /ethereal/plugins/sbus/COPYING        (revision 0)
+++ /ethereal/plugins/sbus/COPYING        (revision 0)
@@ -0,0 +1,340 @@
+                  GNU GENERAL PUBLIC LICENSE
+                     Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+     59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                         Preamble
+
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+Foundation's software and to any other program whose authors commit to
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+
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+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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+  1. You may copy and distribute verbatim copies of the Program's
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+
+You may charge a fee for the physical act of transferring a copy, and
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+  2. You may modify your copy or copies of the Program or any portion
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+free software which everyone can redistribute and change under these terms.
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+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
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+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
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+    GNU General Public License for more details.
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+    You should have received a copy of the GNU General Public License
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+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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+    Gnomovision version 69, Copyright (C) year  name of author
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+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
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+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.
Index: /ethereal/plugins/sbus/Makefile.am
===================================================================
--- /ethereal/plugins/sbus/Makefile.am    (revision 0)
+++ /ethereal/plugins/sbus/Makefile.am    (revision 0)
@@ -0,0 +1,44 @@
+# Makefile.am
+# Automake file for Ethereal/ACN
+#
+# $Id: Makefile.am 11400 2004-07-18 00:24:25Z guy $
+#
+# Ethereal - Network traffic analyzer
+# By Gerald Combs <gerald@xxxxxxxxxxxx>
+# Copyright 1998 Gerald Combs
+# 
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+
+INCLUDES = -I$(top_srcdir)
+
+plugindir = @plugindir@
+
+plugin_LTLIBRARIES = sbus.la
+sbus_la_SOURCES = packet-sbus.c moduleinfo.h
+sbus_la_LDFLAGS = -module -avoid-version
+sbus_la_LIBADD = @PLUGIN_LIBS@
+
+# Libs must be cleared, or else libtool won't create a shared module.
+# If your module needs to be linked against any particular libraries,
+# add them here.
+LIBS =
+
+CLEANFILES = \
+       sbus \
+       *~
+
+EXTRA_DIST = \
+       Makefile.nmake
\ No newline at end of file
Index: /ethereal/autogen.sh
===================================================================
--- /ethereal/autogen.sh  (revision 18189)
+++ /ethereal/autogen.sh  (working copy)
@@ -10,7 +10,7 @@
 # If you are going to use the non-default name for automake becase your OS
 # installaion has multiple versions, you need to call both aclocal and automake
 # with that version number, as they come from the same package.
-#AM_VERSION='-1.8'
+# AM_VERSION='-1.8'
 
 ACLOCAL=aclocal$AM_VERSION
 AUTOHEADER=autoheader

Attachment: VariousSBus
Description: Binary data

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