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|
/* packet-lg8979.c
* Routines for Landis & Gyr (Telegyr) 8979 Protocol (lg8979) Dissection
* By Chris Bontje (cbontje[AT]gmail.com
* Copyright 2013-2016
*
************************************************************************************************
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include "packet-tcp.h"
#include <epan/prefs.h>
void proto_register_lg8979(void);
/* Initialize the protocol and registered fields */
static int proto_lg8979 = -1;
static int hf_lg8979_header = -1;
static int hf_lg8979_flags = -1;
static int hf_lg8979_shr = -1;
static int hf_lg8979_mfc = -1;
static int hf_lg8979_ack = -1;
static int hf_lg8979_con = -1;
static int hf_lg8979_frz = -1;
static int hf_lg8979_ind = -1;
static int hf_lg8979_sch = -1;
static int hf_lg8979_slg = -1;
static int hf_lg8979_address = -1;
static int hf_lg8979_lastblock = -1;
static int hf_lg8979_funccode = -1;
static int hf_lg8979_length = -1;
static int hf_lg8979_start_ptnum16 = -1;
static int hf_lg8979_start_ptnum8 = -1;
static int hf_lg8979_stop_ptnum16 = -1;
static int hf_lg8979_stop_ptnum8 = -1;
static int hf_lg8979_ang_point = -1;
static int hf_lg8979_adc_ref_zero = -1;
static int hf_lg8979_adc_ref_neg90 = -1;
static int hf_lg8979_adc_ref_pos90 = -1;
static int hf_lg8979_ind_chgrpt_ptnum = -1;
static int hf_lg8979_ind_chgrpt_status = -1;
static int hf_lg8979_ind_chgrpt_change = -1;
static int hf_lg8979_ind_frcrpt_status_b0 = -1;
static int hf_lg8979_ind_frcrpt_status_b1 = -1;
static int hf_lg8979_ind_frcrpt_status_b2 = -1;
static int hf_lg8979_ind_frcrpt_status_b3 = -1;
static int hf_lg8979_ind_frcrpt_status_b4 = -1;
static int hf_lg8979_ind_frcrpt_status_b5 = -1;
static int hf_lg8979_ind_frcrpt_status_b6 = -1;
static int hf_lg8979_ind_frcrpt_status_b7 = -1;
static int hf_lg8979_ind_frcrpt_change_b0 = -1;
static int hf_lg8979_ind_frcrpt_change_b1 = -1;
static int hf_lg8979_ind_frcrpt_change_b2 = -1;
static int hf_lg8979_ind_frcrpt_change_b3 = -1;
static int hf_lg8979_ind_frcrpt_change_b4 = -1;
static int hf_lg8979_ind_frcrpt_change_b5 = -1;
static int hf_lg8979_ind_frcrpt_change_b6 = -1;
static int hf_lg8979_ind_frcrpt_change_b7 = -1;
static int hf_lg8979_soe_chgrpt_ptnum = -1;
static int hf_lg8979_soe_chgrpt_status = -1;
static int hf_lg8979_soe_chgrpt_change = -1;
static int hf_lg8979_soe_frcrpt_status_b0 = -1;
static int hf_lg8979_soe_frcrpt_status_b1 = -1;
static int hf_lg8979_soe_frcrpt_status_b2 = -1;
static int hf_lg8979_soe_frcrpt_status_b3 = -1;
static int hf_lg8979_soe_frcrpt_status_b4 = -1;
static int hf_lg8979_soe_frcrpt_status_b5 = -1;
static int hf_lg8979_soe_frcrpt_status_b6 = -1;
static int hf_lg8979_soe_frcrpt_status_b7 = -1;
static int hf_lg8979_soe_frcrpt_change_b0 = -1;
static int hf_lg8979_soe_frcrpt_change_b1 = -1;
static int hf_lg8979_soe_frcrpt_change_b2 = -1;
static int hf_lg8979_soe_frcrpt_change_b3 = -1;
static int hf_lg8979_soe_frcrpt_change_b4 = -1;
static int hf_lg8979_soe_frcrpt_change_b5 = -1;
static int hf_lg8979_soe_frcrpt_change_b6 = -1;
static int hf_lg8979_soe_frcrpt_change_b7 = -1;
static int hf_lg8979_digin_b0 = -1;
static int hf_lg8979_digin_b1 = -1;
static int hf_lg8979_digin_b2 = -1;
static int hf_lg8979_digin_b3 = -1;
static int hf_lg8979_digin_b4 = -1;
static int hf_lg8979_digin_b5 = -1;
static int hf_lg8979_digin_b6 = -1;
static int hf_lg8979_digin_b7 = -1;
static int hf_lg8979_digin_b8 = -1;
static int hf_lg8979_digin_b9 = -1;
static int hf_lg8979_digin_b10 = -1;
static int hf_lg8979_digin_b11 = -1;
static int hf_lg8979_digin_b12 = -1;
static int hf_lg8979_digin_b13 = -1;
static int hf_lg8979_digin_b14 = -1;
static int hf_lg8979_digin_b15 = -1;
static int hf_lg8979_acc_point = -1;
static int hf_lg8979_soe_logchg_ptnum = -1;
static int hf_lg8979_soe_logchg_newstat = -1;
static int hf_lg8979_soe_logchg_mon = -1;
static int hf_lg8979_soe_logchg_day = -1;
static int hf_lg8979_soe_logchg_hour = -1;
static int hf_lg8979_soe_logchg_min = -1;
static int hf_lg8979_soe_logchg_sec = -1;
static int hf_lg8979_soe_logchg_msec = -1;
static int hf_lg8979_ang_output_val = -1;
static int hf_lg8979_sbo_tripclose = -1;
static int hf_lg8979_sbo_timercnt = -1;
static int hf_lg8979_digout_data = -1;
static int hf_lg8979_pul_output_base = -1;
static int hf_lg8979_pul_output_dur = -1;
static int hf_lg8979_pul_output_rl = -1;
static int hf_lg8979_ang_deadband = -1;
static int hf_lg8979_ang_group = -1;
static int hf_lg8979_ang_group_pts = -1;
static int hf_lg8979_acc_preset = -1;
static int hf_lg8979_rtucfg_num_chassis = -1;
static int hf_lg8979_rtucfg_chassis_num = -1;
static int hf_lg8979_rtucfg_card_slot = -1;
static int hf_lg8979_timesync_mon = -1;
static int hf_lg8979_timesync_day = -1;
static int hf_lg8979_timesync_hour = -1;
static int hf_lg8979_timesync_min = -1;
static int hf_lg8979_timesync_sec = -1;
static int hf_lg8979_timesync_msec = -1;
static int hf_lg8979_timebias_value = -1;
static int hf_lg8979_timebias_proctime = -1;
static int hf_lg8979_firmware_ver = -1;
static int hf_lg8979_exprpt_code = -1;
static int hf_lg8979_exprpt_parm = -1;
static int hf_lg8979_disallowed_func = -1;
static int hf_lg8979_crc16 = -1;
/* Initialize the subtree pointers */
static gint ett_lg8979 = -1;
static gint ett_lg8979_flags = -1;
static gint ett_lg8979_funccode = -1;
static gint ett_lg8979_point = -1;
static gint ett_lg8979_ts = -1;
/* Globals for L&G 8979 Protocol Preferences */
static gboolean lg8979_desegment = TRUE;
#define LG8979_HEADER 0xFF
#define LG8979_DIR_INDETERMINATE 0
#define LG8979_DIR_MASTER_TO_RTU 1
#define LG8979_DIR_RTU_TO_MASTER 2
/* Function Codes */
#define LG8979_FC_ANG_CHGRPT 0
#define LG8979_FC_ANG_FRCRPT 1
#define LG8979_FC_ANGGRP_CHGRPT 2
#define LG8979_FC_ANGGRP_FRCRPT 3
#define LG8979_FC_ADC_FRCRPT 5
#define LG8979_FC_IND_CHGRPT 6
#define LG8979_FC_IND_FRCRPT 7
#define LG8979_FC_SOE_CHGRPT 8
#define LG8979_FC_SOE_FRCRPT 9
#define LG8979_FC_DIG_FRCRPT 11
#define LG8979_FC_ACC_CHGRPT 12
#define LG8979_FC_ACC_FRCRPT 13
#define LG8979_FC_SOELOG_CHGRPT 14
#define LG8979_FC_ANG_OUTPUT 20
#define LG8979_FC_SBO_SELECT 21
#define LG8979_FC_SBO_OPERATE 22
#define LG8979_FC_DIG_OUTPUT 23
#define LG8979_FC_ACC_FREEZE 24
#define LG8979_FC_PUL_OUTPUT 25
#define LG8979_FC_PULTR_OUTPUT 26
#define LG8979_FC_SBO_IMEXECUTE 28
#define LG8979_FC_RTU_RESTART 30
#define LG8979_FC_RTU_CONFIG 31
#define LG8979_FC_TIME_SYNC 32
#define LG8979_FC_TIME_BIAS 33
#define LG8979_FC_ANG_DEADBAND 34
#define LG8979_FC_ANGGRP_DEFINE 35
#define LG8979_FC_ACC_PRESET 36
#define LG8979_FC_CONT_REQUEST 37
#define LG8979_FC_REPEAT_MSG 38
#define LG8979_FC_FIRMWARE_CFG 39
#define LG8979_FC_TABLE_READ 47
#define LG8979_FC_TABLE_WRITE 48
#define LG8979_FC_SPRPT_INT 50
#define LG8979_FC_SPRPT_SEQNUM 51
#define LG8979_FC_EXP_RPT 63
static const value_string lg8979_funccode_vals[] = {
{ LG8979_FC_ANG_CHGRPT, "Analog Change Report" },
{ LG8979_FC_ANG_FRCRPT, "Analog Force Report" },
{ LG8979_FC_ANGGRP_CHGRPT, "Analog Group Change Report" },
{ LG8979_FC_ANGGRP_FRCRPT, "Analog Group Force Report" },
{ 4, "Unknown/Invalid Function" },
{ LG8979_FC_ADC_FRCRPT, "ADC Reference Force Report" },
{ LG8979_FC_IND_CHGRPT, "Indication Change Report" },
{ LG8979_FC_IND_FRCRPT, "Indication Force Report" },
{ LG8979_FC_SOE_CHGRPT, "SOE Change Report" },
{ LG8979_FC_SOE_FRCRPT, "SOE Force Report" },
{ 10, "Unknown/Invalid Function" },
{ LG8979_FC_DIG_FRCRPT, "Digital Input Force Report" },
{ LG8979_FC_ACC_CHGRPT, "Accumulator Change Report" },
{ LG8979_FC_ACC_FRCRPT, "Accumulator Force Report" },
{ LG8979_FC_SOELOG_CHGRPT, "SOE Log Change Report" },
{ 15, "Unknown/Invalid Function" },
{ 16, "Unknown/Invalid Function" },
{ 17, "Unknown/Invalid Function" },
{ 18, "Unknown/Invalid Function" },
{ 19, "Unknown/Invalid Function" },
{ LG8979_FC_ANG_OUTPUT, "Analog Output" },
{ LG8979_FC_SBO_SELECT, "SBO Select" },
{ LG8979_FC_SBO_OPERATE, "SBO Operate" },
{ LG8979_FC_DIG_OUTPUT, "Digital Output" },
{ LG8979_FC_ACC_FREEZE, "Accumulator Freeze" },
{ LG8979_FC_PUL_OUTPUT, "Pulse Output" },
{ LG8979_FC_PULTR_OUTPUT, "Pulse Train Output" },
{ 27, "Unknown/Invalid Function" },
{ LG8979_FC_SBO_IMEXECUTE, "SBO Immediate Execute" },
{ 29, "Unknown/Invalid Function" },
{ LG8979_FC_RTU_RESTART, "Restart RTU" },
{ LG8979_FC_RTU_CONFIG, "RTU Configuration" },
{ LG8979_FC_TIME_SYNC, "Time Synchronization" },
{ LG8979_FC_TIME_BIAS, "Time Bias" },
{ LG8979_FC_ANG_DEADBAND, "Analog Deadbands" },
{ LG8979_FC_ANGGRP_DEFINE, "Analog Group Define" },
{ LG8979_FC_ACC_PRESET, "Accumulator Preset" },
{ LG8979_FC_CONT_REQUEST, "Continuation Request" },
{ LG8979_FC_REPEAT_MSG, "Repeat Last Message" },
{ LG8979_FC_FIRMWARE_CFG, "Firmware Configuration" },
{ 40, "Unknown/Invalid Function" },
{ 41, "Unknown/Invalid Function" },
{ 42, "Unknown/Invalid Function" },
{ 43, "Unknown/Invalid Function" },
{ 44, "Unknown/Invalid Function" },
{ 45, "Unknown/Invalid Function" },
{ 46, "Unknown/Invalid Function" },
{ LG8979_FC_TABLE_READ, "Table Read" },
{ LG8979_FC_TABLE_WRITE, "Table Write" },
{ 49, "Unknown/Invalid Function" },
{ LG8979_FC_SPRPT_INT, "Spontaneous Report Interval" },
{ LG8979_FC_SPRPT_SEQNUM, "Spontaneous Report Sequence Number" },
{ 52, "Unknown/Invalid Function" },
{ 53, "Unknown/Invalid Function" },
{ 54, "Unknown/Invalid Function" },
{ 55, "Unknown/Invalid Function" },
{ 56, "Unknown/Invalid Function" },
{ 57, "Unknown/Invalid Function" },
{ 58, "Unknown/Invalid Function" },
{ 59, "Unknown/Invalid Function" },
{ 60, "Unknown/Invalid Function" },
{ 61, "Unknown/Invalid Function" },
{ 62, "Unknown/Invalid Function" },
{ LG8979_FC_EXP_RPT, "Exception Report" },
{ 0, NULL }
};
static value_string_ext lg8979_funccode_vals_ext = VALUE_STRING_EXT_INIT(lg8979_funccode_vals);
static const value_string lg8979_cardcode_vals[] = {
{ 0, "Non-Existent Slot" },
{ 1, "Analog Input" },
{ 2, "A/D Converter" },
{ 3, "Analog Output" },
{ 4, "Indication Input" },
{ 5, "24-Bit Digital Output" },
{ 7, "SBO Control Output" },
{ 8, "Accumulator, Form A" },
{ 11, "32-Bit Digital Output" },
{ 12, "Accumulator, Form C" },
{ 15, "Pulse Output" },
{ 28, "SOE Input" },
{ 29, "KWH Input" },
{ 30, "Serial Data Collector" },
{ 31, "Empty Slot" },
{ 0, NULL }
};
static const value_string lg8979_exprpt_code_vals[] = {
{ 0x00, "Warm Restart" },
{ 0x01, "Cold Start" },
{ 0x02, "Insufficient Ram" },
{ 0x03, "Bus Failure" },
{ 0x04, "SBO Failure" },
{ 0x05, "Analog Failure" },
{ 0x06, "Indication/SOE Failure" },
{ 0x07, "Card Placement Error" },
{ 0x08, "Not Used" },
{ 0x09, "Invalid Function Code" },
{ 0x0A, "Invalid Block Length" },
{ 0x0B, "Non-Existent Point" },
{ 0x0C, "Invalid Parameter" },
{ 0x0D, "Select/Execute Mismatch" },
{ 0x0E, "Function Not Allowed" },
{ 0x0F, "Not Used" },
{ 0x10, "Database Setup has Changed" },
{ 0x11, "Indication Change Sequence" },
{ 0, NULL }
};
static const value_string lg8979_exprpt_parm_vals[] = {
{ 0x00, "N/A" },
{ 0x01, "1=Requested CLDSTRT" },
{ 0x02, "N/A" },
{ 0x03, "Unit" },
{ 0x04, "Unit/Slot" },
{ 0x05, "Unit/Slot" },
{ 0x06, "Unit/Slot" },
{ 0x07, "Unit/Slot" },
{ 0x08, "N/A" },
{ 0x09, "Function Code" },
{ 0x0A, "Block Length" },
{ 0x0B, "Point" },
{ 0x0C, "Parameter" },
{ 0x0D, "Execute Point" },
{ 0x0E, "Function Code" },
{ 0x0F, "N/A" },
{ 0x10, "N/A" },
{ 0x11, "1=Time Order (0=Not T/O)" },
{ 0, NULL }
};
static const value_string lg8979_sbo_tripclose_vals[] = {
{ 0x00, "Trip" },
{ 0x01, "Close" },
{ 0, NULL }
};
static const value_string lg8979_pul_output_base_vals[] = {
{ 0x00, "10 msec" },
{ 0x01, "100 msec" },
{ 0x02, "1 sec" },
{ 0x03, "10 sec" },
{ 0, NULL }
};
static const value_string lg8979_pul_output_rl_vals[] = {
{ 0x00, "Lower" },
{ 0x01, "Raise" },
{ 0, NULL }
};
/*************************************************************/
/* Try to determine "direction" of message. */
/* Check the data length within the packet and compare */
/* vs. the function code. Master->RTU messages will have a */
/* fixed length that can be used to determine the direction */
/* of the message */
/*************************************************************/
static int
classify_lg8979_packet(tvbuff_t *tvb)
{
guint8 func, len, data_len, flags;
len = tvb_reported_length(tvb);
/* If TVB length is equal to 5, this is classifed as a 'short response message' */
/* and is guaranteed to be RTU->Master only */
if (len == 5) {
return LG8979_DIR_RTU_TO_MASTER;
}
/* If TVB length is greater than 5, let's dig deeper */
if (len > 5) {
flags = tvb_get_guint8(tvb, 1);
/* Flags vary between message types, so let's try those first to determine the message direction */
/* If both bit 3 and bit 4 are set, this is almost certainly a RTU->Master message */
if ( (flags & 0x04) && (flags & 0x08) ){
return LG8979_DIR_RTU_TO_MASTER;
}
/* If anything is in bits 3-6 without bit 7, this is a RTU->Master message */
else if ( (flags & 0x78) && !(flags & 0x80) ){
return LG8979_DIR_RTU_TO_MASTER;
}
func = tvb_get_guint8(tvb, 3) & 0x7F;
data_len = tvb_get_guint8(tvb, 4);
/* If we have more data in the tvb then should be there, this is a stacked RTU->Master response */
if (len > (data_len + 5 + 2)) {
return LG8979_DIR_RTU_TO_MASTER;
}
switch (func) {
case LG8979_FC_ANG_CHGRPT:
case LG8979_FC_ADC_FRCRPT:
case LG8979_FC_IND_CHGRPT:
case LG8979_FC_SOE_CHGRPT:
case LG8979_FC_ACC_CHGRPT:
case LG8979_FC_SOELOG_CHGRPT:
case LG8979_FC_REPEAT_MSG:
case LG8979_FC_RTU_CONFIG:
case LG8979_FC_FIRMWARE_CFG:
if (data_len == 0) {
return LG8979_DIR_MASTER_TO_RTU;
}
else {
return LG8979_DIR_RTU_TO_MASTER;
}
break;
case LG8979_FC_ANGGRP_CHGRPT:
case LG8979_FC_ANGGRP_FRCRPT:
if (data_len == 1) {
return LG8979_DIR_MASTER_TO_RTU;
}
else {
return LG8979_DIR_RTU_TO_MASTER;
}
break;
case LG8979_FC_DIG_FRCRPT:
case LG8979_FC_ACC_FRCRPT:
case LG8979_FC_TIME_BIAS:
if (data_len == 2) {
return LG8979_DIR_MASTER_TO_RTU;
}
else {
return LG8979_DIR_RTU_TO_MASTER;
}
break;
case LG8979_FC_ANG_FRCRPT:
case LG8979_FC_IND_FRCRPT:
case LG8979_FC_SOE_FRCRPT:
if (data_len == 4) {
return LG8979_DIR_MASTER_TO_RTU;
}
else {
return LG8979_DIR_RTU_TO_MASTER;
}
break;
/* These are either totally or mostly master->RTU operations */
case LG8979_FC_ANG_OUTPUT:
case LG8979_FC_SBO_SELECT:
case LG8979_FC_SBO_OPERATE:
case LG8979_FC_DIG_OUTPUT:
case LG8979_FC_ACC_FREEZE:
case LG8979_FC_PUL_OUTPUT:
case LG8979_FC_PULTR_OUTPUT:
case LG8979_FC_SBO_IMEXECUTE:
case LG8979_FC_TIME_SYNC:
case LG8979_FC_ANG_DEADBAND:
case LG8979_FC_ANGGRP_DEFINE:
case LG8979_FC_ACC_PRESET:
case LG8979_FC_CONT_REQUEST:
return LG8979_DIR_MASTER_TO_RTU;
break;
case LG8979_FC_EXP_RPT:
return LG8979_DIR_RTU_TO_MASTER;
break;
default:
return LG8979_DIR_INDETERMINATE;
break;
}
}
/* else, cannot classify */
return LG8979_DIR_INDETERMINATE;
}
/******************************************************************************************************/
/* Code to dissect L&G 8979 Protocol packets */
/******************************************************************************************************/
static int
dissect_lg8979(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
/* Set up structures needed to add the protocol subtree and manage it */
proto_item *lg8979_item, *lg8979_point_item = NULL;
proto_item *lg8979_slot_item = NULL, *lg8979_ang_group_pts_item = NULL;
proto_tree *lg8979_tree, *lg8979_fc_tree = NULL;
proto_tree *lg8979_point_tree = NULL, *lg8979_ts_tree = NULL;
int offset = 0;
guint8 rtu_addr, func, packet_type, data_len, ptnum8, tripclose, rl, exp_code, num_chassis;
guint8 ts_mon, ts_day, ts_hr, ts_min, ts_sec;
guint16 ptnum, ptval, ana12_val;
guint16 ts_ms;
gint num_points = 0, cnt = 0, cnt1 = 0;
gboolean shr, new_status, change;
/* Make entries in Protocol column on summary display */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "L&G 8979");
col_clear(pinfo->cinfo, COL_INFO);
lg8979_item = proto_tree_add_item(tree, proto_lg8979, tvb, 0, -1, ENC_NA);
lg8979_tree = proto_item_add_subtree(lg8979_item, ett_lg8979);
/* Add 0xFF Header to Protocol Tree */
proto_tree_add_item(lg8979_tree, hf_lg8979_header, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
/* "Request" or "Response" */
packet_type = classify_lg8979_packet(tvb);
/* This packet type is classified as a "Request" and is deemed in the direction of "master -> RTU" */
if (packet_type == LG8979_DIR_MASTER_TO_RTU) {
static int * const request_flags[] = {
&hf_lg8979_shr,
&hf_lg8979_mfc,
&hf_lg8979_ack,
NULL
};
col_add_str(pinfo->cinfo, COL_INFO, "Master -> RTU");
/* Add Flags to Protocol Tree */
shr = tvb_get_guint8(tvb, offset) & 0x80;
proto_tree_add_bitmask(lg8979_tree, tvb, offset, hf_lg8979_flags, ett_lg8979_flags, request_flags, ENC_LITTLE_ENDIAN);
offset += 1;
/* Add RTU Address to Protocol Tree */
rtu_addr = tvb_get_guint8(tvb, offset);
col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Address: %d", rtu_addr);
proto_tree_add_item(lg8979_tree, hf_lg8979_address, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
if (!shr) {
/* Add Function Code & last Mark Block to Protocol Tree */
/* Function code is 7 lower bits of byte , LMB is 8th bit*/
func = tvb_get_guint8(tvb, offset) & 0x7f;
col_append_sep_str(pinfo->cinfo, COL_INFO, NULL,
val_to_str_const(func, lg8979_funccode_vals, "Unknown Function Code"));
lg8979_fc_tree = proto_tree_add_subtree_format(
lg8979_tree, tvb, offset, 1, ett_lg8979_funccode, NULL,
"Function Code: %s (%d)",
val_to_str_const(func, lg8979_funccode_vals, "Unknown Function Code"), func);
proto_tree_add_item(lg8979_fc_tree, hf_lg8979_lastblock, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_fc_tree, hf_lg8979_funccode, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
data_len = tvb_get_guint8(tvb, offset);
proto_tree_add_item(lg8979_tree, hf_lg8979_length, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
switch (func) {
/* Function Code 0 Analog Change Report */
/* Function Code 7 Indication Force Report */
/* Function Code 9 SOE Force Report */
case LG8979_FC_ANG_FRCRPT:
case LG8979_FC_IND_FRCRPT:
case LG8979_FC_SOE_FRCRPT:
proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum16, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_tree, hf_lg8979_stop_ptnum16, tvb, offset+2, 2, ENC_LITTLE_ENDIAN);
offset += 4;
break;
/* Function Code 2 Analog Group Change Report */
case LG8979_FC_ANGGRP_CHGRPT:
proto_tree_add_item(lg8979_tree, hf_lg8979_ang_group, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
break;
/* Function Code 11 Digital Input Force Report */
/* Function Code 13 Accumulator Force Report */
case LG8979_FC_DIG_FRCRPT:
case LG8979_FC_ACC_FRCRPT:
proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_tree, hf_lg8979_stop_ptnum8, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
offset += 2;
break;
/* Function Code 20 Analog Output */
case LG8979_FC_ANG_OUTPUT:
proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_tree, hf_lg8979_ang_output_val, tvb, offset+1, 2, ENC_LITTLE_ENDIAN);
offset += 3;
break;
/* Function Code 21 SBO Select */
case LG8979_FC_SBO_SELECT:
/* Get 8-bit point number and trip/close command-code */
ptnum = tvb_get_guint8(tvb, offset);
tripclose = (tvb_get_guint8(tvb, offset+1) & 0x80) >> 7;
lg8979_point_tree = proto_tree_add_subtree_format(
lg8979_tree, tvb, offset, 2,
ett_lg8979_point, NULL,
"SBO Command, Pt.Num: %u, Code: %s",
ptnum,
val_to_str_const(tripclose, lg8979_sbo_tripclose_vals, "Unknown Control Code"));
/* Update the Information Column with Command Details */
col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Output: %u, Code: %s",
ptnum, val_to_str_const(tripclose, lg8979_sbo_tripclose_vals, "Unknown Control Code"));
/* Add SBO Select Details to tree */
proto_tree_add_item(lg8979_point_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_sbo_tripclose, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_sbo_timercnt, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
offset += 2;
break;
/* Function Code 22 SBO Operate */
case LG8979_FC_SBO_OPERATE:
/* Get 8-bit point number */
ptnum = tvb_get_guint8(tvb, offset);
/* Update the Information Column with Command Details */
col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Output: %u", ptnum);
/* Add 8-bit point number to tree */
proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
break;
/* Function Code 23 Digital Output */
case LG8979_FC_DIG_OUTPUT:
/* Add Digital Output Details to tree */
proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_tree, hf_lg8979_digout_data, tvb, offset+1, 3, ENC_LITTLE_ENDIAN);
offset += 4;
break;
/* Function Code 25 Pulse Output */
case LG8979_FC_PUL_OUTPUT:
ptnum = tvb_get_guint8(tvb, offset);
rl = (tvb_get_guint8(tvb, offset+1) & 0x80) >> 7;
lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 2,
ett_lg8979_point, NULL, "Pulse Output, Pt.Num: %u, Code: %s",
ptnum, val_to_str_const(rl, lg8979_pul_output_rl_vals, "Unknown Control Code"));
/* Add Pulse Output Details to tree */
proto_tree_add_item(lg8979_point_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_pul_output_base, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_pul_output_dur, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_pul_output_rl, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
offset += 2;
break;
/* Function Code 32 Time Synchronization */
case LG8979_FC_TIME_SYNC:
/* Add 7-byte time-sync value to tree */
ts_mon = tvb_get_guint8(tvb, offset);
ts_day = tvb_get_guint8(tvb, offset+1);
ts_hr = tvb_get_guint8(tvb, offset+2);
ts_min = tvb_get_guint8(tvb, offset+3);
ts_sec = tvb_get_guint8(tvb, offset+4);
ts_ms = tvb_get_letohs(tvb, offset+5);
lg8979_ts_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 7, ett_lg8979_ts, NULL,
"Time-Sync Value: %02d/%02d %02d:%02d:%02d.%03d",
ts_mon, ts_day, ts_hr, ts_min, ts_sec, ts_ms);
proto_tree_add_item(lg8979_ts_tree, hf_lg8979_timesync_mon, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_ts_tree, hf_lg8979_timesync_day, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_ts_tree, hf_lg8979_timesync_hour, tvb, offset+2, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_ts_tree, hf_lg8979_timesync_min, tvb, offset+3, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_ts_tree, hf_lg8979_timesync_sec, tvb, offset+4, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_ts_tree, hf_lg8979_timesync_msec, tvb, offset+5, 2, ENC_LITTLE_ENDIAN);
offset += 7;
break;
/* Function Code 33 Time Bias */
case LG8979_FC_TIME_BIAS:
proto_tree_add_item(lg8979_tree, hf_lg8979_timebias_value, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
break;
/* Function Code 34 Analog Deadband Write */
case LG8979_FC_ANG_DEADBAND:
/* Get analog point number base and add to tree */
ptnum = tvb_get_letohs(tvb, offset);
proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum16, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
num_points = (data_len-2);
for (cnt=0; cnt<num_points; cnt++) {
ptval = tvb_get_guint8(tvb, offset);
proto_tree_add_uint_format(lg8979_tree, hf_lg8979_ang_deadband, tvb, offset, 1,
ptnum, "Point Number %u: New Deadband: %u", ptnum, ptval);
ptnum += 1;
offset += 1;
}
break;
/* Function Code 35 Analog Group Define */
case LG8979_FC_ANGGRP_DEFINE:
proto_tree_add_item(lg8979_tree, hf_lg8979_ang_group, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum16, tvb, offset+1, 2, ENC_LITTLE_ENDIAN);
offset += 3;
num_points = (data_len-3);
for (cnt=0; cnt<num_points; cnt++) {
lg8979_ang_group_pts_item = proto_tree_add_item(lg8979_tree, hf_lg8979_ang_group_pts, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_item_append_text(lg8979_ang_group_pts_item, " (%d - %d), ", (cnt*8), ((cnt*8)+7));
offset += 1;
}
break;
/* Function Code 36 Accumulator Preset */
case LG8979_FC_ACC_PRESET:
/* Each qty to follow has a 8-bit point number followed by a 16-bit value */
num_points = ((data_len)/3);
for (cnt=0; cnt<num_points; cnt++) {
ptnum8 = tvb_get_guint8(tvb, offset);
ptval = tvb_get_letohs(tvb, offset+1);
proto_tree_add_uint_format(lg8979_tree, hf_lg8979_acc_preset, tvb, offset, 3,
ptnum8, "Acc Point Number %u: Preset: %u", ptnum8, ptval);
offset += 3;
}
break;
default:
break;
} /* func */
} /* !shr */
/* Add CRC-16 */
proto_tree_add_item(lg8979_tree, hf_lg8979_crc16, tvb, offset, 2, ENC_BIG_ENDIAN);
}
/* This packet type is classified as a "Response" and is deemed in the direction of "RTU -> master" */
else if (packet_type == LG8979_DIR_RTU_TO_MASTER) {
static int * const response_flags[] = {
&hf_lg8979_shr,
&hf_lg8979_con,
&hf_lg8979_frz,
&hf_lg8979_ind,
&hf_lg8979_sch,
&hf_lg8979_slg,
NULL
};
col_add_str(pinfo->cinfo, COL_INFO, "RTU -> Master");
/* Retrieve and add Flags to Protocol Tree */
shr = tvb_get_guint8(tvb, offset) & 0x80;
proto_tree_add_bitmask(lg8979_tree, tvb, offset, hf_lg8979_flags, ett_lg8979_flags, response_flags, ENC_LITTLE_ENDIAN);
offset += 1;
/* Add RTU Address to Protocol Tree */
rtu_addr = tvb_get_guint8(tvb, offset);
col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Address: %d", rtu_addr);
proto_tree_add_item(lg8979_tree, hf_lg8979_address, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
/* If this is not a short response, and there are at least 2 bytes remaining continue to process function codes */
while ((!shr) && (tvb_reported_length_remaining(tvb, offset) > 2)){
/* Add Function Code & last Mark Block to Protocol Tree */
/* Function code is 7 lower bits of byte , LMB is 8th bit*/
func = tvb_get_guint8(tvb, offset) & 0x7f;
col_append_sep_str(pinfo->cinfo, COL_INFO, NULL,
val_to_str_const(func, lg8979_funccode_vals, "Unknown Function Code"));
lg8979_fc_tree = proto_tree_add_subtree_format(
lg8979_tree, tvb, offset, 1, ett_lg8979_funccode, NULL,
"Function Code: %s (%d)", val_to_str_const(func, lg8979_funccode_vals, "Unknown Function Code"), func);
proto_tree_add_item(lg8979_fc_tree, hf_lg8979_lastblock, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(lg8979_fc_tree, hf_lg8979_funccode, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
data_len = tvb_get_guint8(tvb, offset);
proto_tree_add_item(lg8979_tree, hf_lg8979_length, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
switch (func) {
/* Function Code 0 Analog Change Report */
/* Function Code 2 Analog Group Change Report */
case LG8979_FC_ANG_CHGRPT:
case LG8979_FC_ANGGRP_CHGRPT:
num_points = (data_len / 3);
for (cnt=0; cnt<num_points; cnt++) {
ptnum = ( tvb_get_guint8(tvb, offset) | ((tvb_get_guint8(tvb, offset+1) & 0x0F) << 8) );
ptval = ( ((tvb_get_guint8(tvb, offset+1) & 0xF0) >> 4) | (tvb_get_guint8(tvb, offset+2) << 4) );
proto_tree_add_uint_format(lg8979_tree, hf_lg8979_ang_point, tvb, offset, 3, ptnum,
"Point Number %u: %u", ptnum, ptval);
offset += 3;
}
break;
/* Function Code 1 Analog Force Report */
case LG8979_FC_ANG_FRCRPT:
ptnum = tvb_get_letohs(tvb, offset);
proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum16, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
/* Decode 12-bit analog data following this 3-byte bit pattern.
* Byte 1: PtVal 'N' LSB
* Byte 2: PtVal 'N+1' LSB : PtVal 'N' MSB
* Byte 3: PtVal 'N+1' MSB
* To determine the number of points based on the data bytes, we need to know
* if we have an even or odd number of data bytes.
*/
/* even number of data bytes */
if (((data_len-2) % 3) == 0) {
num_points = (((data_len-2) / 3) * 2);
}
/* odd number of data bytes */
else {
num_points = ((((data_len-2) / 3) * 2) + 1);
}
/* loop through the data bytes decoding 12-bit analogs.
When on an even count, offset by 1 and on an odd, offset by 2. */
for (cnt=0; cnt < num_points; cnt++) {
if (cnt%2 == 0) {
ana12_val = ( tvb_get_guint8(tvb, offset) | ((tvb_get_guint8(tvb, offset+1) & 0x0F) << 8) );
proto_tree_add_uint_format(lg8979_tree, hf_lg8979_ang_point, tvb, offset, 2, ptnum,
"Point Number %u: %u", ptnum, ana12_val);
offset += 1;
/* If we are in the last run through the for loop, increment the offset by 1 more byte than normal */
if (cnt == (num_points - 1)) {
offset += 1;
}
}
else {
ana12_val = ( ((tvb_get_guint8(tvb, offset) & 0xF0) >> 4) | (tvb_get_guint8(tvb, offset+1) << 4) );
proto_tree_add_uint_format(lg8979_tree, hf_lg8979_ang_point, tvb, offset, 2, ptnum,
"Point Number %u: %u", ptnum, ana12_val);
offset += 2;
}
ptnum += 1;
}
break;
/* Function Code 5 ADC Reference Force Report */
/* Same byte pattern as 3 sequential analogs in a Force Report would follow */
case LG8979_FC_ADC_FRCRPT:
proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum16, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
/* Retrieve the 0 and -90% references */
ana12_val = ( tvb_get_guint8(tvb, offset) | ((tvb_get_guint8(tvb, offset+1) & 0x0F) << 8) );
proto_tree_add_uint(lg8979_tree, hf_lg8979_adc_ref_zero, tvb, offset, 2, ana12_val);
ana12_val = ( ((tvb_get_guint8(tvb, offset+1) & 0xF0) >> 4) | (tvb_get_guint8(tvb, offset+2) << 4) );
proto_tree_add_uint(lg8979_tree, hf_lg8979_adc_ref_neg90, tvb, offset+1, 2, ana12_val);
offset += 3;
/* Retrieve the +90% reference */
ana12_val = ( tvb_get_guint8(tvb, offset) | ((tvb_get_guint8(tvb, offset+1) & 0x0F) << 8) );
proto_tree_add_uint(lg8979_tree, hf_lg8979_adc_ref_pos90, tvb, offset, 2, ana12_val);
offset += 2;
break;
/* Function Code 6 Indication Change Report */
case LG8979_FC_IND_CHGRPT:
num_points = (data_len / 2);
for (cnt=0; cnt<num_points; cnt++) {
/* Get 12-bit point number and new status / change bits */
ptnum = tvb_get_letohs(tvb, offset) & 0xFFF;
new_status = (tvb_get_guint8(tvb, offset+1) & 0x80) >> 7;
change = (tvb_get_guint8(tvb, offset+1) & 0x40) >> 6;
lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 2, ett_lg8979_point, NULL,
"Indication Change Report, Point Number: %u, Status: %u, Change %u", ptnum, new_status, change);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_chgrpt_ptnum, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_chgrpt_status, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_chgrpt_change, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
}
break;
/* Function Code 7 Indication Force Report */
case LG8979_FC_IND_FRCRPT:
ptnum = tvb_get_letohs(tvb, offset);
proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum16, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
num_points = ((data_len - 2) / 2);
for (cnt=0; cnt<num_points; cnt++) {
lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 1,
ett_lg8979_point, NULL, "Indication Status, Base Point Num %d", ptnum);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_status_b0, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_status_b1, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_status_b2, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_status_b3, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_status_b4, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_status_b5, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_status_b6, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_status_b7, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 1,
ett_lg8979_point, NULL, "Indication Change, Base Point Num %d", ptnum);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_change_b0, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_change_b1, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_change_b2, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_change_b3, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_change_b4, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_change_b5, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_change_b6, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_ind_frcrpt_change_b7, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
ptnum += 8;
}
break;
/* Function Code 8 SOE Change Report */
case LG8979_FC_SOE_CHGRPT:
num_points = (data_len / 2);
for (cnt=0; cnt<num_points; cnt++) {
/* Get 12-bit point number and new status / change bits */
ptnum = tvb_get_letohs(tvb, offset) & 0xFFF;
new_status = (tvb_get_guint8(tvb, offset+1) & 0x80) >> 7;
change = (tvb_get_guint8(tvb, offset+1) & 0x40) >> 6;
lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 2, ett_lg8979_point, NULL,
"SOE Change Report, Point Number: %u, Status: %u, Change %u", ptnum, new_status, change);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_chgrpt_ptnum, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_chgrpt_status, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_chgrpt_change, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
}
break;
/* Function Code 9 SOE Force Report */
case LG8979_FC_SOE_FRCRPT:
ptnum = tvb_get_letohs(tvb, offset);
proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum16, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
num_points = ((data_len - 2) / 2);
for (cnt=0; cnt<num_points; cnt++) {
lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 1,
ett_lg8979_point, NULL, "SOE Status, Base Point Num %d", ptnum);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_status_b0, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_status_b1, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_status_b2, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_status_b3, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_status_b4, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_status_b5, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_status_b6, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_status_b7, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 1,
ett_lg8979_point, NULL, "SOE Change, Base Point Num %d", ptnum);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_change_b0, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_change_b1, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_change_b2, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_change_b3, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_change_b4, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_change_b5, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_change_b6, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_frcrpt_change_b7, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
ptnum += 8;
}
break;
/* Function Code 11 Digital Input Force Report */
case LG8979_FC_DIG_FRCRPT:
ptnum8 = tvb_get_guint8(tvb, offset);
proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
/* 1 byte per start block and 2 bytes per 16-bit block to follow */
num_points = ((data_len-1)/2);
for (cnt=0; cnt<num_points; cnt++) {
lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 2,
ett_lg8979_point, NULL, "Digital Input Block %d", ptnum8);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b0, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b1, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b2, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b3, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b4, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b5, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b6, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b7, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b8, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b9, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b10, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b11, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b12, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b13, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b14, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_digin_b15, tvb, offset, 2, ENC_LITTLE_ENDIAN);
ptnum8 += 1;
offset += 2;
}
break;
/* Function Code 12 Accumulator Change Report */
/* Function Code 13 Accumulator Force Report */
case LG8979_FC_ACC_CHGRPT:
case LG8979_FC_ACC_FRCRPT:
ptnum8 = tvb_get_guint8(tvb, offset);
proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
/* 1 byte for start point number and 2 bytes for each 16-bit accumulator value */
num_points = ((data_len-1) / 2);
for (cnt=0; cnt<num_points; cnt++) {
lg8979_point_item = proto_tree_add_item(lg8979_tree, hf_lg8979_acc_point, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_item_prepend_text(lg8979_point_item, "Point Number %u, ", ptnum8);
offset += 2;
ptnum8 += 1;
}
break;
/* Function Code 14 SOE Log Change Report */
case LG8979_FC_SOELOG_CHGRPT:
/* 9 bytes for each SOE Record */
num_points = (data_len / 9);
for (cnt=0; cnt<num_points; cnt++) {
/* Get 12-bit point number and new status bit */
ptnum = tvb_get_letohs(tvb, offset) & 0xFFF;
new_status = (tvb_get_guint8(tvb, offset+1) & 0x80) >> 7;
lg8979_point_tree = proto_tree_add_subtree_format(lg8979_tree, tvb, offset, 9, ett_lg8979_point, NULL,
"SOE Log Change Report, Point Number: %u, New Status: %u", ptnum, new_status);
/* Add 12-bit point number and "new status" bit to tree */
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_logchg_ptnum, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_soe_logchg_newstat, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
/* Add 7-byte time-stamp to tree */
ts_mon = tvb_get_guint8(tvb, offset);
ts_day = tvb_get_guint8(tvb, offset+1);
ts_hr = tvb_get_guint8(tvb, offset+2);
ts_min = tvb_get_guint8(tvb, offset+3);
ts_sec = tvb_get_guint8(tvb, offset+4);
ts_ms = tvb_get_letohs(tvb, offset+5);
lg8979_ts_tree = proto_tree_add_subtree_format(lg8979_point_tree, tvb, offset, 7, ett_lg8979_ts, NULL,
"SOE Time Stamp: [%02d/%02d %02d:%02d:%02d.%03d]", ts_mon, ts_day, ts_hr, ts_min, ts_sec, ts_ms);
proto_tree_add_item(lg8979_ts_tree, hf_lg8979_soe_logchg_mon, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_ts_tree, hf_lg8979_soe_logchg_day, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_ts_tree, hf_lg8979_soe_logchg_hour, tvb, offset+2, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_ts_tree, hf_lg8979_soe_logchg_min, tvb, offset+3, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_ts_tree, hf_lg8979_soe_logchg_sec, tvb, offset+4, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_ts_tree, hf_lg8979_soe_logchg_msec, tvb, offset+5, 2, ENC_LITTLE_ENDIAN);
offset += 7;
}
break;
/* Function Code 21 SBO Select - Echo of Master->RTU Message */
case LG8979_FC_SBO_SELECT:
/* Get 8-bit point number and trip/close command-code */
ptnum = tvb_get_guint8(tvb, offset);
tripclose = (tvb_get_guint8(tvb, offset+1) & 0x80) >> 7;
lg8979_point_tree = proto_tree_add_subtree_format(
lg8979_tree, tvb, offset, 2,
ett_lg8979_point, NULL,
"SBO Command, Pt.Num: %u, Code: %s",
ptnum,
val_to_str_const(tripclose, lg8979_sbo_tripclose_vals, "Unknown Control Code"));
/* Update the Information Column with Command Details */
col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Output: %u, Code: %s",
ptnum, val_to_str_const(tripclose, lg8979_sbo_tripclose_vals, "Unknown Control Code"));
/* Add SBO Select Details to tree */
proto_tree_add_item(lg8979_point_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_sbo_tripclose, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_point_tree, hf_lg8979_sbo_timercnt, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
offset += 2;
break;
/* Function Code 22 SBO Operate - Echo of Master->RTU Message */
case LG8979_FC_SBO_OPERATE:
/* Get 8-bit point number */
ptnum = tvb_get_guint8(tvb, offset);
/* Update the Information Column with Command Details */
col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Output: %u", ptnum);
/* Add 8-bit point number to tree */
proto_tree_add_item(lg8979_tree, hf_lg8979_start_ptnum8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
break;
/* Function Code 31 RTU Configuration */
case LG8979_FC_RTU_CONFIG:
/* Number of IO Chassis */
num_chassis = tvb_get_guint8(tvb, offset);
proto_tree_add_item(lg8979_tree, hf_lg8979_rtucfg_num_chassis, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
for (cnt=0; cnt<num_chassis; cnt++) {
/* Chassis Number */
proto_tree_add_item(lg8979_tree, hf_lg8979_rtucfg_chassis_num, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
/* Card Codes For Each Slot (0-15) */
for (cnt1=0; cnt1<16; cnt1++) {
lg8979_slot_item = proto_tree_add_item(lg8979_tree, hf_lg8979_rtucfg_card_slot, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_item_prepend_text(lg8979_slot_item, "Slot %d, ", cnt1);
offset += 1;
}
}
break;
/* Function Code 33 Time Bias */
case LG8979_FC_TIME_BIAS:
/* Add Time Bias "Processing Time" to tree */
proto_tree_add_item(lg8979_tree, hf_lg8979_timebias_proctime, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
break;
/* Function Code 39 Firmware Configuration */
case LG8979_FC_FIRMWARE_CFG:
proto_tree_add_item(lg8979_tree, hf_lg8979_firmware_ver, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
break;
/* Function Code 63 Exception Report */
/* Parameter byte is context-sensitive to the Code byte used */
/* For example, if the Code byte is 0x01 (Cold Start) the parameter byte is always 0 */
/* If the code byte is 0x09 (Function Code), the parameter byte is the value of the disallowed function code */
case LG8979_FC_EXP_RPT:
exp_code = tvb_get_guint8(tvb, offset);
proto_tree_add_item(lg8979_tree, hf_lg8979_exprpt_code, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(lg8979_tree, hf_lg8979_exprpt_parm, tvb, offset+1, 1, ENC_LITTLE_ENDIAN);
/* Function code lookup, if required */
if (exp_code == 14) {
proto_item *lg8979_dfc_item;
lg8979_dfc_item = proto_tree_add_item(lg8979_tree, hf_lg8979_disallowed_func, tvb, offset+1, 1, ENC_NA);
proto_item_set_generated(lg8979_dfc_item);
}
offset += 2;
break;
default:
break;
}
} /* !shr */
if (shr) {
col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "Short Response");
}
/* Add CRC-16 */
proto_tree_add_item(lg8979_tree, hf_lg8979_crc16, tvb, offset, 2, ENC_BIG_ENDIAN);
} /* packet type */
return tvb_reported_length(tvb);
}
/******************************************************************************************************/
/* Return length of L&G 8979 Protocol over TCP message (used for re-assembly) */
/******************************************************************************************************/
static guint
get_lg8979_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset _U_, void *data _U_)
{
guint len;
len = tvb_reported_length(tvb); /* XXX: should really be some minimum length ?? */
return len;
}
/******************************************************************************************************/
/* Dissect (and possibly Re-assemble) L&G 8979 protocol payload data */
/******************************************************************************************************/
static int
dissect_lg8979_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
gint length = tvb_reported_length(tvb);
/* Check for a L&G8979 packet. It should begin with 0xFF */
if(length < 2 || tvb_get_guint8(tvb, 0) != 0xFF) {
/* Not a L&G 8979 Protocol packet, just happened to use the same port */
return 0;
}
tcp_dissect_pdus(tvb, pinfo, tree, lg8979_desegment, 1,
get_lg8979_len, dissect_lg8979, data);
return length;
}
/******************************************************************************************************/
/* Dissect "simple" L&G 8979 protocol payload (no TCP re-assembly) */
/******************************************************************************************************/
static int
dissect_lg8979_simple(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
gint length = tvb_reported_length(tvb);
/* Check for a L&G8979 packet. It should begin with 0xFF */
if(length < 2 || tvb_get_guint8(tvb, 0) != 0xFF) {
/* Not a L&G 8979 Protocol packet ... */
return 0;
}
dissect_lg8979(tvb, pinfo, tree, data);
return length;
}
/******************************************************************************************************/
/* Register the protocol with Wireshark */
/******************************************************************************************************/
void proto_reg_handoff_lg8979(void);
void
proto_register_lg8979(void)
{
/* L&G 8979 Protocol header fields */
static hf_register_info lg8979_hf[] = {
{ &hf_lg8979_header,
{ "Header", "lg8979.header", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_flags,
{ "Flags", "lg8979.flags", FT_UINT8, BASE_HEX, NULL, 0x00, NULL, HFILL }},
{ &hf_lg8979_shr,
{ "SHR", "lg8979.shr", FT_UINT8, BASE_DEC, NULL, 0x80, "Short Response Flag", HFILL }},
{ &hf_lg8979_mfc,
{ "MFC", "lg8979.mfc", FT_UINT8, BASE_DEC, NULL, 0x78, "Multi Function Code", HFILL }},
{ &hf_lg8979_ack,
{ "ACK", "lg8979.ack", FT_UINT8, BASE_DEC, NULL, 0x04, "Acknowledge Flag", HFILL }},
{ &hf_lg8979_con,
{ "CON", "lg8979.con", FT_UINT8, BASE_DEC, NULL, 0x40, "Continuation Flag", HFILL }},
{ &hf_lg8979_frz,
{ "FRZ", "lg8979.frz", FT_UINT8, BASE_DEC, NULL, 0x20, "Accumulator Freeze Flag", HFILL }},
{ &hf_lg8979_ind,
{ "IND", "lg8979.ind", FT_UINT8, BASE_DEC, NULL, 0x10, "Indication Change Flag", HFILL }},
{ &hf_lg8979_sch,
{ "SCH", "lg8979.sch", FT_UINT8, BASE_DEC, NULL, 0x08, "SOE Change Flag", HFILL }},
{ &hf_lg8979_slg,
{ "SLG", "lg8979.slg", FT_UINT8, BASE_DEC, NULL, 0x04, "SOE Log Flag", HFILL }},
{ &hf_lg8979_address,
{ "RTU Address", "lg8979.address", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_lastblock,
{ "Last Block Mark", "lg8979.lastblock", FT_UINT8, BASE_DEC, NULL, 0x80, NULL, HFILL }},
{ &hf_lg8979_funccode,
{ "Function Code", "lg8979.funccode", FT_UINT8, BASE_DEC|BASE_EXT_STRING, &lg8979_funccode_vals_ext, 0x7F, NULL, HFILL }},
{ &hf_lg8979_length,
{ "Data Length", "lg8979.length", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_start_ptnum16,
{ "Start Point Number (16-bit)", "lg8979.start_ptnum16", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_start_ptnum8,
{ "Start Point Number (8-bit)", "lg8979.start_ptnum8", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_stop_ptnum16,
{ "Stop Point Number (16-bit)", "lg8979.stop_ptnum16", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_stop_ptnum8,
{ "Stop Point Number (8-bit)", "lg8979.stop_ptnum8", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_ang_point,
{ "Analog Point", "lg8979.ang_point", FT_UINT24, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_adc_ref_zero,
{ "ADC Reference (0%)", "lg8979.adc_ref_zero", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_adc_ref_neg90,
{ "ADC Reference (-90%)", "lg8979.adc_ref_neg90", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_adc_ref_pos90,
{ "ADC Reference (+90%)", "lg8979.adc_ref_pos90", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_ind_chgrpt_ptnum,
{ "Point Number (12-bit)", "lg8979.ind_chgrpt_ptnum", FT_UINT16, BASE_DEC, NULL, 0x0FFF, NULL, HFILL }},
{ &hf_lg8979_ind_chgrpt_status,
{ "Status Bit", "lg8979.ind_chgrpt_status", FT_UINT16, BASE_DEC, NULL, 0x8000, NULL, HFILL }},
{ &hf_lg8979_ind_chgrpt_change,
{ "Change Bit", "lg8979.ind_chgrpt_change", FT_UINT16, BASE_DEC, NULL, 0x4000, NULL, HFILL }},
{ &hf_lg8979_ind_frcrpt_status_b0,
{ "Status Bit 0", "lg8979.ind.frcrpt.status_b0", FT_BOOLEAN, 8, NULL, 0x01, NULL, HFILL }},
{ &hf_lg8979_ind_frcrpt_status_b1,
{ "Status Bit 1", "lg8979.ind.frcrpt.status_b1", FT_BOOLEAN, 8, NULL, 0x02, NULL, HFILL }},
{ &hf_lg8979_ind_frcrpt_status_b2,
{ "Status Bit 2", "lg8979.ind.frcrpt.status_b2", FT_BOOLEAN, 8, NULL, 0x04, NULL, HFILL }},
{ &hf_lg8979_ind_frcrpt_status_b3,
{ "Status Bit 3", "lg8979.ind.frcrpt.status_b3", FT_BOOLEAN, 8, NULL, 0x08, NULL, HFILL }},
{ &hf_lg8979_ind_frcrpt_status_b4,
{ "Status Bit 4", "lg8979.ind.frcrpt.status_b4", FT_BOOLEAN, 8, NULL, 0x10, NULL, HFILL }},
{ &hf_lg8979_ind_frcrpt_status_b5,
{ "Status Bit 5", "lg8979.ind.frcrpt.status_b5", FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL }},
{ &hf_lg8979_ind_frcrpt_status_b6,
{ "Status Bit 6", "lg8979.ind.frcrpt.status_b6", FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL }},
{ &hf_lg8979_ind_frcrpt_status_b7,
{ "Status Bit 7", "lg8979.ind.frcrpt.status_b7", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL }},
{ &hf_lg8979_ind_frcrpt_change_b0,
{ "Change Bit 0", "lg8979.ind.frcrpt.change_b0", FT_BOOLEAN, 8, NULL, 0x01, NULL, HFILL }},
{ &hf_lg8979_ind_frcrpt_change_b1,
{ "Change Bit 1", "lg8979.ind.frcrpt.change_b1", FT_BOOLEAN, 8, NULL, 0x02, NULL, HFILL }},
{ &hf_lg8979_ind_frcrpt_change_b2,
{ "Change Bit 2", "lg8979.ind.frcrpt.change_b2", FT_BOOLEAN, 8, NULL, 0x04, NULL, HFILL }},
{ &hf_lg8979_ind_frcrpt_change_b3,
{ "Change Bit 3", "lg8979.ind.frcrpt.change_b3", FT_BOOLEAN, 8, NULL, 0x08, NULL, HFILL }},
{ &hf_lg8979_ind_frcrpt_change_b4,
{ "Change Bit 4", "lg8979.ind.frcrpt.change_b4", FT_BOOLEAN, 8, NULL, 0x10, NULL, HFILL }},
{ &hf_lg8979_ind_frcrpt_change_b5,
{ "Change Bit 5", "lg8979.ind.frcrpt.change_b5", FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL }},
{ &hf_lg8979_ind_frcrpt_change_b6,
{ "Change Bit 6", "lg8979.ind.frcrpt.change_b6", FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL }},
{ &hf_lg8979_ind_frcrpt_change_b7,
{ "Change Bit 7", "lg8979.ind.frcrpt.change_b7", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL }},
{ &hf_lg8979_soe_chgrpt_ptnum,
{ "Point Number (12-bit)", "lg8979.soe_chgrpt_ptnum", FT_UINT16, BASE_DEC, NULL, 0x0FFF, NULL, HFILL }},
{ &hf_lg8979_soe_chgrpt_status,
{ "Status Bit", "lg8979.soe_chgrpt_status", FT_UINT16, BASE_DEC, NULL, 0x8000, NULL, HFILL }},
{ &hf_lg8979_soe_chgrpt_change,
{ "Change Bit", "lg8979.soe_chgrpt_change", FT_UINT16, BASE_DEC, NULL, 0x4000, NULL, HFILL }},
{ &hf_lg8979_soe_frcrpt_status_b0,
{ "Status Bit 0", "lg8979.soe.frcrpt.status_b0", FT_BOOLEAN, 8, NULL, 0x01, NULL, HFILL }},
{ &hf_lg8979_soe_frcrpt_status_b1,
{ "Status Bit 1", "lg8979.soe.frcrpt.status_b1", FT_BOOLEAN, 8, NULL, 0x02, NULL, HFILL }},
{ &hf_lg8979_soe_frcrpt_status_b2,
{ "Status Bit 2", "lg8979.soe.frcrpt.status_b2", FT_BOOLEAN, 8, NULL, 0x04, NULL, HFILL }},
{ &hf_lg8979_soe_frcrpt_status_b3,
{ "Status Bit 3", "lg8979.soe.frcrpt.status_b3", FT_BOOLEAN, 8, NULL, 0x08, NULL, HFILL }},
{ &hf_lg8979_soe_frcrpt_status_b4,
{ "Status Bit 4", "lg8979.soe.frcrpt.status_b4", FT_BOOLEAN, 8, NULL, 0x10, NULL, HFILL }},
{ &hf_lg8979_soe_frcrpt_status_b5,
{ "Status Bit 5", "lg8979.soe.frcrpt.status_b5", FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL }},
{ &hf_lg8979_soe_frcrpt_status_b6,
{ "Status Bit 6", "lg8979.soe.frcrpt.status_b6", FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL }},
{ &hf_lg8979_soe_frcrpt_status_b7,
{ "Status Bit 7", "lg8979.soe.frcrpt.status_b7", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL }},
{ &hf_lg8979_soe_frcrpt_change_b0,
{ "Change Bit 0", "lg8979.soe.frcrpt.change_b0", FT_BOOLEAN, 8, NULL, 0x01, NULL, HFILL }},
{ &hf_lg8979_soe_frcrpt_change_b1,
{ "Change Bit 1", "lg8979.soe.frcrpt.change_b1", FT_BOOLEAN, 8, NULL, 0x02, NULL, HFILL }},
{ &hf_lg8979_soe_frcrpt_change_b2,
{ "Change Bit 2", "lg8979.soe.frcrpt.change_b2", FT_BOOLEAN, 8, NULL, 0x04, NULL, HFILL }},
{ &hf_lg8979_soe_frcrpt_change_b3,
{ "Change Bit 3", "lg8979.soe.frcrpt.change_b3", FT_BOOLEAN, 8, NULL, 0x08, NULL, HFILL }},
{ &hf_lg8979_soe_frcrpt_change_b4,
{ "Change Bit 4", "lg8979.soe.frcrpt.change_b4", FT_BOOLEAN, 8, NULL, 0x10, NULL, HFILL }},
{ &hf_lg8979_soe_frcrpt_change_b5,
{ "Change Bit 5", "lg8979.soe.frcrpt.change_b5", FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL }},
{ &hf_lg8979_soe_frcrpt_change_b6,
{ "Change Bit 6", "lg8979.soe.frcrpt.change_b6", FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL }},
{ &hf_lg8979_soe_frcrpt_change_b7,
{ "Change Bit 7", "lg8979.soe.frcrpt.change_b7", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL }},
{ &hf_lg8979_digin_b0,
{ "Digital Input Bit 0", "lg8979.digin_b0", FT_BOOLEAN, 16, NULL, 0x0001, NULL, HFILL }},
{ &hf_lg8979_digin_b1,
{ "Digital Input Bit 1", "lg8979.digin_b1", FT_BOOLEAN, 16, NULL, 0x0002, NULL, HFILL }},
{ &hf_lg8979_digin_b2,
{ "Digital Input Bit 2", "lg8979.digin_b2", FT_BOOLEAN, 16, NULL, 0x0004, NULL, HFILL }},
{ &hf_lg8979_digin_b3,
{ "Digital Input Bit 3", "lg8979.digin_b3", FT_BOOLEAN, 16, NULL, 0x0008, NULL, HFILL }},
{ &hf_lg8979_digin_b4,
{ "Digital Input Bit 4", "lg8979.digin_b4", FT_BOOLEAN, 16, NULL, 0x0010, NULL, HFILL }},
{ &hf_lg8979_digin_b5,
{ "Digital Input Bit 5", "lg8979.digin_b5", FT_BOOLEAN, 16, NULL, 0x0020, NULL, HFILL }},
{ &hf_lg8979_digin_b6,
{ "Digital Input Bit 6", "lg8979.digin_b6", FT_BOOLEAN, 16, NULL, 0x0040, NULL, HFILL }},
{ &hf_lg8979_digin_b7,
{ "Digital Input Bit 7", "lg8979.digin_b7", FT_BOOLEAN, 16, NULL, 0x0080, NULL, HFILL }},
{ &hf_lg8979_digin_b8,
{ "Digital Input Bit 8", "lg8979.digin_b8", FT_BOOLEAN, 16, NULL, 0x0100, NULL, HFILL }},
{ &hf_lg8979_digin_b9,
{ "Digital Input Bit 9", "lg8979.digin_b9", FT_BOOLEAN, 16, NULL, 0x0200, NULL, HFILL }},
{ &hf_lg8979_digin_b10,
{ "Digital Input Bit 10", "lg8979.digin_b10", FT_BOOLEAN, 16, NULL, 0x0400, NULL, HFILL }},
{ &hf_lg8979_digin_b11,
{ "Digital Input Bit 11", "lg8979.digin_b11", FT_BOOLEAN, 16, NULL, 0x0800, NULL, HFILL }},
{ &hf_lg8979_digin_b12,
{ "Digital Input Bit 12", "lg8979.digin_b12", FT_BOOLEAN, 16, NULL, 0x1000, NULL, HFILL }},
{ &hf_lg8979_digin_b13,
{ "Digital Input Bit 13", "lg8979.digin_b13", FT_BOOLEAN, 16, NULL, 0x2000, NULL, HFILL }},
{ &hf_lg8979_digin_b14,
{ "Digital Input Bit 14", "lg8979.digin_b14", FT_BOOLEAN, 16, NULL, 0x4000, NULL, HFILL }},
{ &hf_lg8979_digin_b15,
{ "Digital Input Bit 15", "lg8979.digin_b15", FT_BOOLEAN, 16, NULL, 0x8000, NULL, HFILL }},
{ &hf_lg8979_acc_point,
{ "Value", "lg8979.acc_point", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_soe_logchg_ptnum,
{ "Point Number", "lg8979.soe_logchg_ptnum", FT_UINT16, BASE_DEC, NULL, 0x0FFF, NULL, HFILL }},
{ &hf_lg8979_soe_logchg_newstat,
{ "New Status", "lg8979.soe_logchg_newstat", FT_UINT16, BASE_DEC, NULL, 0x8000, NULL, HFILL }},
{ &hf_lg8979_soe_logchg_mon,
{ "Month", "lg8979.soe_logchg_mon", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_soe_logchg_day,
{ "Day", "lg8979.soe_logchg_day", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_soe_logchg_hour,
{ "Hours", "lg8979.soe_logchg_hour", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_soe_logchg_min,
{ "Minute", "lg8979.soe_logchg_min", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_soe_logchg_sec,
{ "Second", "lg8979.soe_logchg_sec", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_soe_logchg_msec,
{ "Milli-Second", "lg8979.soe_logchg_msec", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_ang_output_val,
{ "Point Value", "lg8979.ang_output_val", FT_UINT16, BASE_DEC, NULL, 0x0FFF, NULL, HFILL }},
{ &hf_lg8979_sbo_tripclose,
{ "Trip/Close Control Code", "lg8979.sbo_tripclose", FT_UINT8, BASE_DEC, VALS(lg8979_sbo_tripclose_vals), 0x80, NULL, HFILL }},
{ &hf_lg8979_sbo_timercnt,
{ "Timer Count", "lg8979.sbo_timercnt", FT_UINT8, BASE_DEC, NULL, 0x7F, NULL, HFILL }},
{ &hf_lg8979_digout_data,
{ "Data", "lg8979.digout_data", FT_UINT24, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_pul_output_base,
{ "Base Time", "lg8979.pul_output_base", FT_UINT8, BASE_HEX, VALS(lg8979_pul_output_base_vals), 0x03, NULL, HFILL }},
{ &hf_lg8979_pul_output_dur,
{ "Duration", "lg8979.pul_output_dur", FT_UINT8, BASE_HEX, NULL, 0x7C, NULL, HFILL }},
{ &hf_lg8979_pul_output_rl,
{ "Raise/Lower", "lg8979.pul_output_rl", FT_UINT8, BASE_HEX, VALS(lg8979_pul_output_rl_vals), 0x80, NULL, HFILL }},
{ &hf_lg8979_ang_deadband,
{ "Deadband", "lg8979.ang_deadband", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_ang_group,
{ "Analog Group", "lg8979.ang_group", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_ang_group_pts,
{ "Analog Group Points Mask", "lg8979.ang_group_pts", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_acc_preset,
{ "Preset Value", "lg8979.acc_preset", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_rtucfg_num_chassis,
{ "Number of I/O Chassis in RTU", "lg8979.rtucfg_num_chassis", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_rtucfg_chassis_num,
{ "Chassis Number", "lg8979.rtucfg_chassis_num", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_rtucfg_card_slot,
{ "Card Code", "lg8979.rtucfg_card_slot", FT_UINT8, BASE_DEC, VALS(lg8979_cardcode_vals), 0x0, NULL, HFILL }},
{ &hf_lg8979_timesync_mon,
{ "Month", "lg8979.timesync_mon", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_timesync_day,
{ "Day", "lg8979.timesync_day", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_timesync_hour,
{ "Hours", "lg8979.timesync_hour", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_timesync_min,
{ "Minute", "lg8979.timesync_min", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_timesync_sec,
{ "Second", "lg8979.timesync_sec", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_timesync_msec,
{ "Milli-Second", "lg8979.timesync_msec", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_timebias_value,
{ "Time Bias Value", "lg8979.timebias_value", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_firmware_ver,
{ "Firmware Version", "lg8979.firmware_ver", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_timebias_proctime,
{ "Time Bias Processing Time (ms)", "lg8979.timebias_proctime", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lg8979_exprpt_code,
{ "Exception Report Code", "lg8979.exprpt_code", FT_UINT8, BASE_DEC, VALS(lg8979_exprpt_code_vals), 0x0, NULL, HFILL }},
{ &hf_lg8979_exprpt_parm,
{ "Value", "lg8979.exprpt_parm", FT_UINT8, BASE_DEC, VALS(lg8979_exprpt_parm_vals), 0x0, NULL, HFILL }},
{ &hf_lg8979_disallowed_func,
{ "Disallowed Function Code", "lg8979.disallowed_func", FT_UINT8, BASE_DEC|BASE_EXT_STRING, &lg8979_funccode_vals_ext, 0x0, NULL, HFILL }},
{ &hf_lg8979_crc16,
{ "CRC-16", "lg8979.crc16", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_lg8979,
&ett_lg8979_flags,
&ett_lg8979_funccode,
&ett_lg8979_point,
&ett_lg8979_ts,
};
module_t *lg8979_module;
/* Register the protocol name and description */
proto_lg8979 = proto_register_protocol("Landis & Gyr Telegyr 8979", "L&G 8979", "lg8979");
/* Registering protocol to be called by another dissector */
register_dissector("lg8979", dissect_lg8979_simple, proto_lg8979);
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_lg8979, lg8979_hf, array_length(lg8979_hf));
proto_register_subtree_array(ett, array_length(ett));
/* Register required preferences for L&G 8979 register decoding */
lg8979_module = prefs_register_protocol(proto_lg8979, NULL);
/* L&G 8979 - Desegmentmentation; defaults to TRUE for TCP desegmentation*/
prefs_register_bool_preference(lg8979_module, "desegment",
"Desegment all L&G 8979 Protocol packets spanning multiple TCP segments",
"Whether the L&G 8979 dissector should desegment all messages spanning multiple TCP segments",
&lg8979_desegment);
}
/******************************************************************************************************/
void
proto_reg_handoff_lg8979(void)
{
dissector_handle_t lg8979_handle;
/* Make sure to use L&G 8979 Protocol Preferences field to determine default TCP port */
lg8979_handle = create_dissector_handle(dissect_lg8979_tcp, proto_lg8979);
dissector_add_for_decode_as_with_preference("tcp.port", lg8979_handle);
dissector_add_for_decode_as("rtacser.data", lg8979_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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