/* packet-sbus.c * Routines for Ether-S-Bus dissection * Copyright 2006, Christian Durrer * * $Id$ * * Wireshark - Network traffic analyzer * By Gerald Combs * 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 #include #include #include #include #include #include #include /* 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 /*SBus command codes*/ #define SBUS_RD_COUNTER 0x00 #define SBUS_RD_DISPLAY_REGISTER 0x01 #define SBUS_RD_FLAG 0x02 #define SBUS_RD_INPUT 0x03 #define SBUS_RD_RTC 0x04 #define SBUS_RD_OUTPUT 0x05 #define SBUS_RD_REGISTER 0x06 #define SBUS_RD_TIMER 0x07 #define SBUS_WR_COUNTER 0x0A #define SBUS_WR_FLAG 0x0B #define SBUS_WR_RTC 0x0C #define SBUS_WR_OUTPUT 0x0D #define SBUS_WR_REGISTER 0x0E #define SBUS_WR_TIMER 0x0F #define SBUS_RDWR_MULTI_MEDIAS 0x13 #define SBUS_RD_PCD_STATUS_CPU0 0x14 #define SBUS_RD_PCD_STATUS_CPU1 0x15 #define SBUS_RD_PCD_STATUS_CPU2 0x16 #define SBUS_RD_PCD_STATUS_CPU3 0x17 #define SBUS_RD_PCD_STATUS_CPU4 0x18 #define SBUS_RD_PCD_STATUS_CPU5 0x19 #define SBUS_RD_PCD_STATUS_CPU6 0x1A #define SBUS_RD_PCD_STATUS_OWN 0x1B #define SBUS_RD_SBUS_STN_NBR 0x1D #define SBUS_RD_USER_MEMORY 0x1E #define SBUS_RD_PROGRAM_LINE 0x1F #define SBUS_RD_PROGRAM_VERSION 0x20 #define SBUS_RD_TEXT 0x21 #define SBUS_RD_ACTIVE_TRANSITION 0x22 #define SBUS_WR_USER_MEMORY 0x23 #define SBUS_WR_PROGRAM_LINE 0x24 #define SBUS_WR_TEXT 0x25 #define SBUS_RUN_PROCEDURE_CPU0 0x28 #define SBUS_RUN_PROCEDURE_CPU1 0x29 #define SBUS_RUN_PROCEDURE_CPU2 0x2A #define SBUS_RUN_PROCEDURE_CPU3 0x2B #define SBUS_RUN_PROCEDURE_CPU4 0x2C #define SBUS_RUN_PROCEDURE_CPU5 0x2D #define SBUS_RUN_PROCEDURE_CPU6 0x2E #define SBUS_RUN_PROCEDURE_OWN 0x2F #define SBUS_RUN_PROCEDURE_ALL 0x30 #define SBUS_RESTART_COLD_CPU1 0x32 #define SBUS_RESTART_COLD_CPU2 0x33 #define SBUS_RESTART_COLD_CPU3 0x34 #define SBUS_RESTART_COLD_CPU4 0x35 #define SBUS_RESTART_COLD_CPU5 0x36 #define SBUS_RESTART_COLD_CPU6 0x37 #define SBUS_RESTART_COLD_OWN 0x38 #define SBUS_RESTART_COLD_ALL 0x39 #define SBUS_STOP_PROCEDURE_CPU0 0x3C #define SBUS_STOP_PROCEDURE_CPU1 0x3D #define SBUS_STOP_PROCEDURE_CPU2 0x3E #define SBUS_STOP_PROCEDURE_CPU3 0x3F #define SBUS_STOP_PROCEDURE_CPU4 0x40 #define SBUS_STOP_PROCEDURE_CPU5 0x41 #define SBUS_STOP_PROCEDURE_CPU6 0x42 #define SBUS_STOP_PROCEDURE_OWN 0x43 #define SBUS_STOP_PROCEDURE_ALL 0x44 #define SBUS_RD_STATUSFLAG_ACCU 0x46 #define SBUS_RD_BYTE 0x47 #define SBUS_RD_HALT_FAILURE_REG 0x48 #define SBUS_RD_INDEX_REGISTER 0x49 #define SBUS_RD_INSTRUCTION_POINTER 0x4A #define SBUS_FIND_HISTORY 0x4B #define SBUS_WR_STATUSFLAG_ACCU 0x50 #define SBUS_WR_BYTE 0x51 #define SBUS_WR_INDEX_REGISTER 0x52 #define SBUS_WR_INSTRUCTION_POINTER 0x53 #define SBUS_CLEAR_ALL 0x5A #define SBUS_CLEAR_FLAGS 0x5B #define SBUS_CLEAR_OUTPUTS 0x5C #define SBUS_CLEAR_REGISTERS 0x5D #define SBUS_CLEAR_TIMERS 0x5E #define SBUS_RESTART_WARM_CPU1 0x64 #define SBUS_RESTART_WARM_CPU2 0x65 #define SBUS_RESTART_WARM_CPU3 0x66 #define SBUS_RESTART_WARM_CPU4 0x67 #define SBUS_RESTART_WARM_CPU5 0x68 #define SBUS_RESTART_WARM_CPU6 0x69 #define SBUS_RESTART_WARM_OWN 0x6A #define SBUS_RESTART_WARM_ALL 0x6B #define SBUS_CHANGE_BLOCK 0x6E #define SBUS_CLEAR_HISTORY_FAILURE 0x6F #define SBUS_DELETE_PROGRAM_LINE 0x70 #define SBUS_GO_CONDITIONAL 0x71 #define SBUS_INSERT_PROGRAM_LINE 0x72 #define SBUS_LOCAL_CYCLE 0x73 #define SBUS_ALL_CYCLES 0x74 #define SBUS_MAKE_TEXT 0x75 #define SBUS_EXECUTE_SINGLE_INSTR 0x76 #define SBUS_SINGLE_STEP 0x77 #define SBUS_XOB_17_INTERRUPT 0x82 #define SBUS_XOB_18_INTERRUPT 0x83 #define SBUS_XOB_19_INTERRUPT 0x84 #define SBUS_RD_HANGUP_TIMEOUT 0x91 #define SBUS_RD_DATA_BLOCK 0x96 #define SBUS_WR_DATA_BLOCK 0x97 #define SBUS_MAKE_DATA_BLOCK 0x98 #define SBUS_CLEAR_DATA_BLOCK 0x99 #define SBUS_CLEAR_TEXT 0x9A #define SBUS_RD_BLOCK_ADDRESSES 0x9B #define SBUS_RD_BLOCK_SIZES 0x9C #define SBUS_RD_CURRENT_BLOCK 0x9D #define SBUS_RD_CALL_STACK 0x9E #define SBUS_RD_DBX 0x9F #define SBUS_RD_USER_EEPROM_REGISTER 0xA1 #define SBUS_WR_USER_EEPROM_REGISTER 0xA3 #define SBUS_ERASE_FLASH 0xA5 #define SBUS_RESTART_COLD_FLAG 0xA6 #define SBUS_WR_SYSTEM_BUFFER 0xA7 #define SBUS_RD_SYSTEM_BUFFER 0xA8 #define SBUS_RD_WR_PCD_BLOCK 0xA9 #define SBUS_GET_DIAGNOSTIC 0xAA #define SBUS_RD_SYSTEM_INFORMATION 0xAB #define SBUS_CHANGE_BLOCKS_ON_RUN 0xAC #define SBUS_FLASHCARD_TELEGRAM 0xAD #define SBUS_DOWNLOAD_FIRMWARE 0xAE #define SBUS_WEB_SERVER_SERIAL_COMM 0xAF /* 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 information 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; 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; 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_web_size; guint8 sbus_web_aid; guint8 sbus_web_seq; guint8 sbus_sysinfo_number; guint32 sbus_binarymasked; guint32 sbus_binaries; guint16 sbus_ack_code; 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) == SBUS_RD_USER_EEPROM_REGISTER) || ((request_val->cmd_code) == SBUS_WR_USER_EEPROM_REGISTER)) { 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) == SBUS_RD_SYSTEM_INFORMATION) { 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)) { 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 == SBUS_WEB_SERVER_SERIAL_COMM) { 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) == SBUS_WEB_SERVER_SERIAL_COMM)) { sbus_web_size = tvb_get_guint8(tvb,9); sbus_web_aid = tvb_get_guint8(tvb,10); col_add_fstr(pinfo->cinfo, COL_INFO, "Response: %s", val_to_str(sbus_web_aid, webserver_aid_vals, "Unknown Request!")); if (sbus_web_size > 1) { sbus_web_seq = tvb_get_guint8(tvb,11); col_append_fstr(pinfo->cinfo, COL_INFO, " (Seq No: %d)", 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: col_set_str(pinfo->cinfo, COL_INFO, "Unknown attribute"); break; } } /* create display subtree for the protocol */ if (tree) { ti = proto_tree_add_item(tree, proto_sbus, tvb, offset, -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, offset, 8, "Ether-S-Bus header"); ethsbus_tree = proto_item_add_subtree(et, ett_sbus_ether); /* 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; sbus_version = tvb_get_guint8(tvb,offset); 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*/ sbus_attribut = tvb_get_guint8(tvb,offset); proto_tree_add_item(sbus_tree, hf_sbus_attribut, tvb, offset, 1, FALSE); offset += 1; if (sbus_attribut == SBUS_REQUEST) { proto_tree_add_item(sbus_tree, hf_sbus_dest, tvb, offset, 1, FALSE); offset += 1; sbus_cmd_code = tvb_get_guint8(tvb,offset); proto_tree_add_item(sbus_tree, hf_sbus_command, tvb, offset, 1, FALSE); offset += 1; switch (sbus_cmd_code) { /*Read Counter, Register or Timer*/ case SBUS_RD_COUNTER: case SBUS_RD_REGISTER: case SBUS_RD_TIMER: sbus_media_cnt = (tvb_get_guint8(tvb,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_rtc, tvb, offset, 2, FALSE); offset += 2; break; /*Read Flag, Input or Output*/ case SBUS_RD_FLAG: case SBUS_RD_INPUT: case SBUS_RD_OUTPUT: sbus_media_cnt = (tvb_get_guint8(tvb,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_iof, tvb, offset, 2, FALSE); offset += 2; break; /*Write Register Timer Counter*/ case SBUS_WR_COUNTER: case SBUS_WR_REGISTER: case SBUS_WR_TIMER: sbus_media_cnt = (tvb_get_guint8(tvb,offset)); 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; } break; /* Write flags and outputs*/ case SBUS_WR_FLAG: case SBUS_WR_OUTPUT: sbus_media_cnt = (tvb_get_guint8(tvb,offset)); 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_iof, tvb, offset, 2, FALSE); offset += 2; sbus_fio_cnt = (tvb_get_guint8(tvb,offset)); sbus_fio_cnt = ((sbus_fio_cnt + 1)); 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; } break; /* Request: Write Real time clock*/ case SBUS_WR_RTC: 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; break; /* Read user memory or program line*/ case SBUS_RD_USER_MEMORY: case SBUS_RD_PROGRAM_LINE: sbus_media_cnt = (tvb_get_guint8(tvb,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_prog, tvb, offset, 3, FALSE); offset += 3; break; /*Write user memory*/ case SBUS_WR_USER_MEMORY: sbus_media_cnt = (tvb_get_guint8(tvb,offset)); 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; } break; /* Read byte*/ case SBUS_RD_BYTE: sbus_media_cnt = (tvb_get_guint8(tvb,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_68k, tvb, offset, 3, FALSE); offset += 3; break; /* Write byte */ case SBUS_WR_BYTE: sbus_media_cnt = (tvb_get_guint8(tvb,offset)); 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; } break; /*Read EEPROM register*/ case SBUS_RD_USER_EEPROM_REGISTER: proto_tree_add_item(sbus_tree, hf_sbus_command_extension, tvb, offset, 1, FALSE); offset += 1; sbus_media_cnt = (tvb_get_guint8(tvb,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; break; /*Request for reading system info*/ /*Syinfo 05 is not implemented as no serial baud is possible*/ case SBUS_RD_SYSTEM_INFORMATION: 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; break; /* WebServer Request */ case SBUS_WEB_SERVER_SERIAL_COMM: sbus_web_size = tvb_get_guint8(tvb,offset); proto_tree_add_item(sbus_tree, hf_sbus_web_size, tvb, offset, 1, sbus_web_size); offset += 1; sbus_web_aid = tvb_get_guint8(tvb,offset); proto_tree_add_item(sbus_tree, hf_sbus_web_aid, tvb, offset, 1, sbus_web_aid); offset += 1; sbus_web_seq = tvb_get_guint8(tvb,offset); 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; } } break; /*Inform that command was not dissected and add remaining length*/ default: if (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 (sbus_attribut == SBUS_RESPONSE && request_val) { switch (request_val->cmd_code) { /* Response: 32 bit values*/ case SBUS_RD_COUNTER: case SBUS_RD_REGISTER: case SBUS_RD_TIMER: case SBUS_RD_USER_MEMORY: case SBUS_RD_PROGRAM_LINE: case SBUS_RD_USER_EEPROM_REGISTER: /*Add subtree for Data*/ dt = proto_tree_add_text(sbus_tree, tvb, offset, ((request_val->count) * 4),"Data"); 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_rtc, tvb, offset, 4, FALSE); offset += 4; } break; /* Response: PCD Display register*/ case SBUS_RD_DISPLAY_REGISTER: proto_tree_add_item(sbus_tree, hf_sbus_display_register, tvb, offset, 4, FALSE); offset += 4; break; /* Add binary data I, O, F*/ case SBUS_RD_FLAG: case SBUS_RD_INPUT: case SBUS_RD_OUTPUT: /*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; } break; /* Response: Real time clock value*/ case SBUS_RD_RTC: 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; break; /* Response: CPU status, the command codes 14..1B are concerned*/ case SBUS_RD_PCD_STATUS_CPU0: case SBUS_RD_PCD_STATUS_CPU1: case SBUS_RD_PCD_STATUS_CPU2: case SBUS_RD_PCD_STATUS_CPU3: case SBUS_RD_PCD_STATUS_CPU4: case SBUS_RD_PCD_STATUS_CPU5: case SBUS_RD_PCD_STATUS_CPU6: case SBUS_RD_PCD_STATUS_OWN: proto_tree_add_item(sbus_tree, hf_sbus_cpu_status, tvb, offset, 1, FALSE); offset += 1; break; /* Response: Station address*/ case SBUS_RD_SBUS_STN_NBR: proto_tree_add_item(sbus_tree, hf_sbus_address, tvb, offset, 1, FALSE); offset += 1; break; /* Response: Firmware version */ case SBUS_RD_PROGRAM_VERSION: /*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); break; /* Response for Status Flags*/ case SBUS_RD_STATUSFLAG_ACCU: /*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; break; /* Response for Read byte */ case SBUS_RD_BYTE: /*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; } break; /* Response for Read Index register */ case SBUS_RD_INDEX_REGISTER: /*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; } break; /* Response: Instruction pointer*/ case SBUS_RD_INSTRUCTION_POINTER: proto_tree_add_item(sbus_tree, hf_sbus_addr_prog, tvb, offset, 3, FALSE); offset += 3; break; /*Response for Find History*/ case SBUS_FIND_HISTORY: 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; break; /* Response: Read current block*/ case SBUS_RD_CURRENT_BLOCK: 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; break; /* Response: Read system infomation (without interpretation of module info)*/ case SBUS_RD_SYSTEM_INFORMATION: 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; } break; /* Response: Webserver request */ case SBUS_WEB_SERVER_SERIAL_COMM: sbus_web_size = tvb_get_guint8(tvb,offset); proto_tree_add_item(sbus_tree, hf_sbus_web_size, tvb, offset, 1, sbus_web_size); offset += 1; sbus_web_aid = tvb_get_guint8(tvb,offset); proto_tree_add_item(sbus_tree, hf_sbus_web_aid, tvb, offset, 1, sbus_web_aid); offset += 1; if (sbus_web_size > 1) { sbus_web_seq = tvb_get_guint8(tvb,offset); 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; } } break; /*Inform that response was not dissected and add remaining length*/ default: 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; break; } } 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 Wireshark */ 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); } void proto_reg_handoff_sbus(void) { dissector_handle_t sbus_handle; sbus_handle = create_dissector_handle(dissect_sbus, proto_sbus); dissector_add("udp.port", 5050, sbus_handle); }