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wireshark/epan/dissectors/packet-iec104.c

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/* packet-iec104.c
* Routines for IEC-60870-5-104 (iec104) Protocol disassembly
*
*
* $Id$
*
* Copyright (c) 2008 by Joan Ramio <joan@ramio.cat>
* Joan is a masculine catalan name. Search the Internet for Joan Pujol (alias Garbo).
*
* Copyright (c) 2009 by Kjell Hultman <kjell.hultman@gmail.com>
* Added dissection of signal (ASDU) information.
* Kjell is also a masculine name, but a Scandinavian one.
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1999 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <string.h>
#include <glib.h>
#include <math.h> /* floor */
#include <epan/packet.h>
#include <epan/expert.h>
#include <epan/dissectors/packet-tcp.h>
#include <epan/emem.h>
/* IEC-104 comment: Fields are little endian. */
#define MAXS 256
static dissector_handle_t iec104asdu_handle;
/* the asdu header structure */
struct asduheader {
guint16 Addr;
guint8 OA;
guint8 TypeId;
guint8 TNCause;
guint32 IOA;
guint8 NumIx;
guint8 SQ;
};
/* asdu command value/status structure */
typedef struct {
gboolean OFF;
gboolean ON;
gboolean UP;
gboolean DOWN;
/* QOC qualifier-bits */
guint16 QU; /* qualifier-value */
gboolean ZeroP; /* No pulse */
gboolean ShortP; /* Short Pulse */
gboolean LongP; /* Long Pulse */
gboolean Persist; /* Persistent output */
gboolean SE; /* Select (1) / Execute (0) */
} td_CmdInfo;
#define IEC104_PORT 2404
/* Define the iec104 proto */
static int proto_iec104apci = -1;
static int proto_iec104asdu = -1;
/* Protocol constants */
#define APCI_START 0x68
#define APCI_LEN 6
#define APCI_START_LEN 2
#define APCI_DATA_LEN (APCI_LEN- APCI_START_LEN)
#define APDU_MIN_LEN 4
#define APDU_MAX_LEN 253
/* ASDU_HEAD_LEN: Includes Asdu head and first IOA */
#define ASDU_HEAD_LEN 9
#define F_TEST 0x80
#define F_NEGA 0x40
#define F_CAUSE 0x3F
#define F_SQ 0x80
/* APCI types */
/* Type I is only lowest bit set to 0 */
#define I_TYPE 0
#define I_TYPE2 2
#define S_TYPE 1
#define U_TYPE 3
#define APCI_TYPE_UNKNOWN 4
static const value_string apci_types [] = {
{ I_TYPE, "I" },
{ S_TYPE, "S" },
{ I_TYPE2, "I" },
{ U_TYPE, "U" },
{ 0, NULL }
};
/* Constants relative to the filed, independent of the field position in the byte */
/* U (Unnombered) constants */
#define U_STARTDT_ACT 0x01
#define U_STARTDT_CON 0x02
#define U_STOPDT_ACT 0x04
#define U_STOPDT_CON 0x08
#define U_TESTFR_ACT 0x10
#define U_TESTFR_CON 0x20
static const value_string u_types[] = {
{ U_STARTDT_ACT, "STARTDT act" },
{ U_STARTDT_CON, "STARTDT con" },
{ U_STOPDT_ACT, "STOPDT act" },
{ U_STOPDT_CON, "STOPDT con" },
{ U_TESTFR_ACT, "TESTFR act" },
{ U_TESTFR_CON, "TESTFR con" },
{ 0, NULL }
};
/* ASDU types (TypeId) */
#define M_SP_NA_1 1 /* single-point information */
#define M_DP_NA_1 3 /* double-point information */
#define M_ST_NA_1 5 /* step position information */
#define M_BO_NA_1 7 /* bitstring of 32 bits */
#define M_ME_NA_1 9 /* measured value, normalized value */
#define M_ME_NB_1 11 /* measured value, scaled value */
#define M_ME_NC_1 13 /* measured value, short floating point number */
#define M_IT_NA_1 15 /* integrated totals */
#define M_PS_NA_1 20 /* packed single-point information with status change detection */
#define M_ME_ND_1 21 /* measured value, normalized value without quality descriptor */
#define M_SP_TB_1 30 /* single-point information with time tag CP56Time2a */
#define M_DP_TB_1 31 /* double-point information with time tag CP56Time2a */
#define M_ST_TB_1 32 /* step position information with time tag CP56Time2a */
#define M_BO_TB_1 33 /* bitstring of 32 bit with time tag CP56Time2a */
#define M_ME_TD_1 34 /* measured value, normalized value with time tag CP56Time2a */
#define M_ME_TE_1 35 /* measured value, scaled value with time tag CP56Time2a */
#define M_ME_TF_1 36 /* measured value, short floating point number with time tag CP56Time2a */
#define M_IT_TB_1 37 /* integrated totals with time tag CP56Time2a */
#define M_EP_TD_1 38 /* event of protection equipment with time tag CP56Time2a */
#define M_EP_TE_1 39 /* packed start events of protection equipment with time tag CP56Time2a */
#define M_EP_TF_1 40 /* packed output circuit information of protection equipment with time tag CP56Time2a */
#define C_SC_NA_1 45 /* single command */
#define C_DC_NA_1 46 /* double command */
#define C_RC_NA_1 47 /* regulating step command */
#define C_SE_NA_1 48 /* set point command, normalized value */
#define C_SE_NB_1 49 /* set point command, scaled value */
#define C_SE_NC_1 50 /* set point command, short floating point number */
#define C_BO_NA_1 51 /* bitstring of 32 bits */
#define C_SC_TA_1 58 /* single command with time tag CP56Time2a */
#define C_DC_TA_1 59 /* double command with time tag CP56Time2a */
#define C_RC_TA_1 60 /* regulating step command with time tag CP56Time2a */
#define C_SE_TA_1 61 /* set point command, normalized value with time tag CP56Time2a */
#define C_SE_TB_1 62 /* set point command, scaled value with time tag CP56Time2a */
#define C_SE_TC_1 63 /* set point command, short floating-point number with time tag CP56Time2a */
#define C_BO_TA_1 64 /* bitstring of 32 bits with time tag CP56Time2a */
#define M_EI_NA_1 70 /* end of initialization */
#define C_IC_NA_1 100 /* interrogation command */
#define C_CI_NA_1 101 /* counter interrogation command */
#define C_RD_NA_1 102 /* read command */
#define C_CS_NA_1 103 /* clock synchronization command */
#define C_RP_NA_1 105 /* reset process command */
#define C_TS_TA_1 107 /* test command with time tag CP56Time2a */
#define P_ME_NA_1 110 /* parameter of measured value, normalized value */
#define P_ME_NB_1 111 /* parameter of measured value, scaled value */
#define P_ME_NC_1 112 /* parameter of measured value, short floating-point number */
#define P_AC_NA_1 113 /* parameter activation */
#define F_FR_NA_1 120 /* file ready */
#define F_SR_NA_1 121 /* section ready */
#define F_SC_NA_1 122 /* call directory, select file, call file, call section */
#define F_LS_NA_1 123 /* last section, last segment */
#define F_AF_NA_1 124 /* ack file, ack section */
#define F_SG_NA_1 125 /* segment */
#define F_DR_TA_1 126 /* directory */
#define F_SC_NB_1 127 /* Query Log - Request archive file */
static const value_string asdu_types [] = {
{ M_SP_NA_1, "M_SP_NA_1" },
{ M_DP_NA_1, "M_DP_NA_1" },
{ M_ST_NA_1, "M_ST_NA_1" },
{ M_BO_NA_1, "M_BO_NA_1" },
{ M_ME_NA_1, "M_ME_NA_1" },
{ M_ME_NB_1, "M_ME_NB_1" },
{ M_ME_NC_1, "M_ME_NC_1" },
{ M_IT_NA_1, "M_IT_NA_1" },
{ M_PS_NA_1, "M_PS_NA_1" },
{ M_ME_ND_1, "M_ME_ND_1" },
{ M_SP_TB_1, "M_SP_TB_1" },
{ M_DP_TB_1, "M_DP_TB_1" },
{ M_ST_TB_1, "M_ST_TB_1" },
{ M_BO_TB_1, "M_BO_TB_1" },
{ M_ME_TD_1, "M_ME_TD_1" },
{ M_ME_TE_1, "M_ME_TE_1" },
{ M_ME_TF_1, "M_ME_TF_1" },
{ M_IT_TB_1, "M_IT_TB_1" },
{ M_EP_TD_1, "M_EP_TD_1" },
{ M_EP_TE_1, "M_EP_TE_1" },
{ M_EP_TF_1, "M_EP_TF_1" },
{ C_SC_NA_1, "C_SC_NA_1" },
{ C_DC_NA_1, "C_DC_NA_1" },
{ C_RC_NA_1, "C_RC_NA_1" },
{ C_SE_NA_1, "C_SE_NA_1" },
{ C_SE_NB_1, "C_SE_NB_1" },
{ C_SE_NC_1, "C_SE_NC_1" },
{ C_BO_NA_1, "C_BO_NA_1" },
{ C_SC_TA_1, "C_SC_TA_1" },
{ C_DC_TA_1, "C_DC_TA_1" },
{ C_RC_TA_1, "C_RC_TA_1" },
{ C_SE_TA_1, "C_SE_TA_1" },
{ C_SE_TB_1, "C_SE_TB_1" },
{ C_SE_TC_1, "C_SE_TC_1" },
{ C_BO_TA_1, "C_BO_TA_1" },
{ M_EI_NA_1, "M_EI_NA_1" },
{ C_IC_NA_1, "C_IC_NA_1" },
{ C_CI_NA_1, "C_CI_NA_1" },
{ C_RD_NA_1, "C_RD_NA_1" },
{ C_CS_NA_1, "C_CS_NA_1" },
{ C_RP_NA_1, "C_RP_NA_1" },
{ C_TS_TA_1, "C_TS_TA_1" },
{ P_ME_NA_1, "P_ME_NA_1" },
{ P_ME_NB_1, "P_ME_NB_1" },
{ P_ME_NC_1, "P_ME_NC_1" },
{ P_AC_NA_1, "P_AC_NA_1" },
{ F_FR_NA_1, "F_FR_NA_1" },
{ F_SR_NA_1, "F_SR_NA_1" },
{ F_SC_NA_1, "F_SC_NA_1" },
{ F_LS_NA_1, "F_LS_NA_1" },
{ F_AF_NA_1, "F_AF_NA_1" },
{ F_SG_NA_1, "F_SG_NA_1" },
{ F_DR_TA_1, "F_DR_TA_1" },
{ F_SC_NB_1, "F_SC_NB_1" },
{ 0, NULL }
};
static const value_string asdu_lngtypes [] = {
{ M_SP_NA_1, "single-point information" },
{ M_DP_NA_1, "double-point information" },
{ M_ST_NA_1, "step position information" },
{ M_BO_NA_1, "bitstring of 32 bits" },
{ M_ME_NA_1, "measured value, normalized value" },
{ M_ME_NB_1, "measured value, scaled value" },
{ M_ME_NC_1, "measured value, short floating point number" },
{ M_IT_NA_1, "integrated totals" },
{ M_PS_NA_1, "packed single-point information with status change detection" },
{ M_ME_ND_1, "measured value, normalized value without quality descriptor" },
{ M_SP_TB_1, "single-point information with time tag CP56Time2a" },
{ M_DP_TB_1, "double-point information with time tag CP56Time2a" },
{ M_ST_TB_1, "step position information with time tag CP56Time2a" },
{ M_BO_TB_1, "bitstring of 32 bit with time tag CP56Time2a" },
{ M_ME_TD_1, "measured value, normalized value with time tag CP56Time2a" },
{ M_ME_TE_1, "measured value, scaled value with time tag CP56Time2a" },
{ M_ME_TF_1, "measured value, short floating point number with time tag CP56Time2a" },
{ M_IT_TB_1, "integrated totals with time tag CP56Time2a" },
{ M_EP_TD_1, "event of protection equipment with time tag CP56Time2a" },
{ M_EP_TE_1, "packed start events of protection equipment with time tag CP56Time2a" },
{ M_EP_TF_1, "packed output circuit information of protection equipment with time tag CP56Time2a" },
{ C_SC_NA_1, "single command" },
{ C_DC_NA_1, "double command" },
{ C_RC_NA_1, "regulating step command" },
{ C_SE_NA_1, "set point command, normalized value" },
{ C_SE_NB_1, "set point command, scaled value" },
{ C_SE_NC_1, "set point command, short floating point number" },
{ C_BO_NA_1, "bitstring of 32 bits" },
{ C_SC_TA_1, "single command with time tag CP56Time2a" },
{ C_DC_TA_1, "double command with time tag CP56Time2a" },
{ C_RC_TA_1, "regulating step command with time tag CP56Time2a" },
{ C_SE_TA_1, "set point command, normalized value with time tag CP56Time2a" },
{ C_SE_TB_1, "set point command, scaled value with time tag CP56Time2a" },
{ C_SE_TC_1, "set point command, short floating-point number with time tag CP56Time2a" },
{ C_BO_TA_1, "bitstring of 32 bits with time tag CP56Time2a" },
{ M_EI_NA_1, "end of initialization" },
{ C_IC_NA_1, "interrogation command" },
{ C_CI_NA_1, "counter interrogation command" },
{ C_RD_NA_1, "read command" },
{ C_CS_NA_1, "clock synchronization command" },
{ C_RP_NA_1, "reset process command" },
{ C_TS_TA_1, "test command with time tag CP56Time2a" },
{ P_ME_NA_1, "parameter of measured value, normalized value" },
{ P_ME_NB_1, "parameter of measured value, scaled value" },
{ P_ME_NC_1, "parameter of measured value, short floating-point number" },
{ P_AC_NA_1, "parameter activation" },
{ F_FR_NA_1, "file ready" },
{ F_SR_NA_1, "section ready" },
{ F_SC_NA_1, "call directory, select file, call file, call section" },
{ F_LS_NA_1, "last section, last segment" },
{ F_AF_NA_1, "ack file, ack section" },
{ F_SG_NA_1, "segment" },
{ F_DR_TA_1, "directory" },
{ F_SC_NB_1, "Query Log - Request archive file" },
{ 0, NULL }
};
/* Cause of Transmision (CauseTx) */
#define Per_Cyc 1
#define Back 2
#define Spont 3
#define Init 4
#define Req 5
#define Act 6
#define ActCon 7
#define Deact 8
#define DeactCon 9
#define ActTerm 10
#define Retrem 11
#define Retloc 12
#define File 13
#define Inrogen 20
#define Inro1 21
#define Inro2 22
#define Inro3 23
#define Inro4 24
#define Inro5 25
#define Inro6 26
#define Inro7 27
#define Inro8 28
#define Inro9 29
#define Inro10 30
#define Inro11 31
#define Inro12 32
#define Inro13 33
#define Inro14 34
#define Inro15 35
#define Inro16 36
#define Reqcogen 37
#define Reqco1 38
#define Reqco2 39
#define Reqco3 40
#define Reqco4 41
#define UkTypeId 44
#define UkCauseTx 45
#define UkComAdrASDU 46
#define UkIOA 47
static const value_string causetx_types [] = {
{ Per_Cyc ,"Per/Cyc" },
{ Back ,"Back" },
{ Spont ,"Spont" },
{ Init ,"Init" },
{ Req ,"Req" },
{ Act ,"Act" },
{ ActCon ,"ActCon" },
{ Deact ,"Deact" },
{ DeactCon ,"DeactCon" },
{ ActTerm ,"ActTerm" },
{ Retrem ,"Retrem" },
{ Retloc ,"Retloc" },
{ File ,"File" },
{ Inrogen ,"Inrogen" },
{ Inro1 ,"Inro1" },
{ Inro2 ,"Inro2" },
{ Inro3 ,"Inro3" },
{ Inro4 ,"Inro4" },
{ Inro5 ,"Inro5" },
{ Inro6 ,"Inro6" },
{ Inro7 ,"Inro7" },
{ Inro8 ,"Inro8" },
{ Inro9 ,"Inro9" },
{ Inro10 ,"Inro10" },
{ Inro11 ,"Inro11" },
{ Inro12 ,"Inro12" },
{ Inro13 ,"Inro13" },
{ Inro14 ,"Inro14" },
{ Inro15 ,"Inro15" },
{ Inro16 ,"Inro16" },
{ Reqcogen ,"Reqcogen" },
{ Reqco1 ,"Reqco1" },
{ Reqco2 ,"Reqco2" },
{ Reqco3 ,"Reqco3" },
{ Reqco4 ,"Reqco4" },
{ UkTypeId ,"UkTypeId" },
{ UkCauseTx ,"UkCauseTx" },
{ UkComAdrASDU ,"UkComAdrASDU" },
{ UkIOA ,"UkIOA" },
{ 0, NULL }
};
static const value_string diq_types[] = {
{ 0, "IPOS0" },
{ 1, "OFF" },
{ 2, "ON" },
{ 3, "IPOS3" },
{ 0, NULL }
};
static const value_string qos_qu_types[] = {
{ 0, "No pulse defined" },
{ 1, "Short Pulse" },
{ 2, "Long Pulse" },
{ 3, "Persistent Output" },
{ 0, NULL }
};
static const value_string dco_on_types[] = {
{ 0, "(None)" },
{ 1, "OFF" },
{ 2, "ON" },
{ 3, "Error: On/Off not defined" },
{ 0, NULL }
};
static const value_string rco_up_types[] = {
{ 0, "(None)" },
{ 1, "DOWN" },
{ 2, "UP" },
{ 3, "Error: Up/Down not defined" },
{ 0, NULL }
};
static const true_false_string tfs_blocked_not_blocked = { "Blocked", "Not blocked" };
static const true_false_string tfs_substituted_not_substituted = { "Substituted", "Not Substituted" };
static const true_false_string tfs_not_topical_topical = { "Not Topical", "Topical" };
static const true_false_string tfs_invalid_valid = { "Invalid", "Valid" };
static const true_false_string tfs_overflow_no_overflow = { "Overflow", "No overflow" };
static const true_false_string tfs_select_execute = { "Select", "Execute" };
/* Protocol fields to be filtered */
static int hf_apdulen = -1;
static int hf_apcitype = -1;
static int hf_apciutype = -1;
static int hf_apcitx = -1;
static int hf_apcirx = -1;
static int hf_apcidata = -1;
static int hf_addr = -1;
static int hf_oa = -1;
static int hf_typeid = -1;
static int hf_causetx = -1;
static int hf_nega = -1;
static int hf_test = -1;
static int hf_ioa = -1;
static int hf_numix = -1;
static int hf_sq = -1;
static int hf_cp56time = -1;
static int hf_siq = -1;
static int hf_siq_on = -1;
static int hf_siq_bl = -1;
static int hf_siq_sb = -1;
static int hf_siq_nt = -1;
static int hf_siq_iv = -1;
static int hf_diq = -1;
static int hf_diq_value = -1;
static int hf_diq_bl = -1;
static int hf_diq_sb = -1;
static int hf_diq_nt = -1;
static int hf_diq_iv = -1;
static int hf_qds = -1;
static int hf_qds_ov = -1;
static int hf_qds_bl = -1;
static int hf_qds_sb = -1;
static int hf_qds_nt = -1;
static int hf_qds_iv = -1;
static int hf_vti = -1;
static int hf_vti_tr = -1;
static int hf_qos_ql = -1;
static int hf_qos_se = -1;
static int hf_sco = -1;
static int hf_sco_on = -1;
static int hf_sco_qu = -1;
static int hf_sco_se = -1;
static int hf_dco = -1;
static int hf_dco_on = -1;
static int hf_dco_qu = -1;
static int hf_dco_se = -1;
static int hf_rco = -1;
static int hf_rco_up = -1;
static int hf_rco_qu = -1;
static int hf_rco_se = -1;
static gint hf_asdu_bitstring = -1;
static gint hf_asdu_float = -1;
static gint hf_asdu_normval = -1;
static gint ett_apci = -1;
static gint ett_asdu = -1;
static gint ett_asdu_objects = -1;
static gint ett_siq = -1;
static gint ett_diq = -1;
static gint ett_qds = -1;
static gint ett_sco = -1;
static gint ett_dco = -1;
static gint ett_rco = -1;
/* Misc. functions for dissection of signal values */
/* ====================================================================
void get_CP56Time( td_CP56Time *cp56t, tvbuff_t *tvb, guint8 offset)
Dissects the CP56Time2a time (Seven octet binary time)
that starts 'offset' bytes in 'tvb'.
The time and date is put in struct 'cp56t'
==================================================================== */
static void get_CP56Time(tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree )
{
guint16 ms;
guint8 valid;
struct tm tm;
nstime_t datetime;
proto_item* ti;
ms = tvb_get_letohs( tvb , *offset );
(*offset) += 2;
tm.tm_sec = ms / 1000;
datetime.nsecs = ms * 1000000;
tm.tm_min = tvb_get_guint8(tvb, *offset);
/* "Invalid" -- Todo: test */
valid = tm.tm_min & 0x80;
tm.tm_min &= 0x3F;
(*offset)++;
tm.tm_hour = 0x1F & tvb_get_guint8(tvb, *offset);
(*offset)++;
tm.tm_mday = tvb_get_guint8(tvb, *offset) & 0x1F;
(*offset)++;
tm.tm_mon = 0x0F & tvb_get_guint8(tvb, *offset);
(*offset)++;
tm.tm_year = 0x7F & tvb_get_guint8(tvb, *offset);
(*offset)++;
tm.tm_isdst = -1; /* there's no info on whether DST was in force; assume it's
* the same as currently */
datetime.secs = mktime(&tm);
ti = proto_tree_add_time(iec104_header_tree, hf_cp56time, tvb, (*offset)-7, 7, &datetime);
proto_item_append_text(ti, "%s", valid ? "Invalid":"Valid");
}
/* ====================================================================
Information object address (Identifier)
ASDU -> Inform Object #1 -> Information object address
==================================================================== */
static proto_item* get_InfoObjectAddress( guint32 *asdu_info_obj_addr, tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree )
{
proto_item* ti;
/* -------- Information object address */
*asdu_info_obj_addr = tvb_get_letoh24(tvb, *offset);
ti = proto_tree_add_item(iec104_header_tree, hf_ioa, tvb, *offset, 3, ENC_LITTLE_ENDIAN);
(*offset) += 3;
return ti;
}
/* ====================================================================
SIQ: Single-point information (IEV 371-02-07) w quality descriptor
==================================================================== */
static void get_SIQ( tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree )
{
proto_item* ti;
proto_tree* siq_tree;
ti = proto_tree_add_item(iec104_header_tree, hf_siq, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
siq_tree = proto_item_add_subtree( ti, ett_siq );
proto_tree_add_item(siq_tree, hf_siq_on, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(siq_tree, hf_siq_bl, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(siq_tree, hf_siq_sb, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(siq_tree, hf_siq_nt, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(siq_tree, hf_siq_iv, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
(*offset)++;
}
/* ====================================================================
DIQ: Double-point information (IEV 371-02-08) w quality descriptor
==================================================================== */
static void get_DIQ( tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree )
{
proto_item* ti;
proto_tree* diq_tree;
ti = proto_tree_add_item(iec104_header_tree, hf_diq, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
diq_tree = proto_item_add_subtree( ti, ett_diq );
proto_tree_add_item(diq_tree, hf_diq_value, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(diq_tree, hf_diq_bl, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(diq_tree, hf_diq_sb, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(diq_tree, hf_diq_nt, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(diq_tree, hf_diq_iv, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
(*offset)++;
}
/* ====================================================================
QDS: Quality descriptor (separate octet)
==================================================================== */
static void get_QDS( tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree )
{
proto_item* ti;
proto_tree* qds_tree;
ti = proto_tree_add_item(iec104_header_tree, hf_qds, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
qds_tree = proto_item_add_subtree( ti, ett_qds );
proto_tree_add_item(qds_tree, hf_qds_ov, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(qds_tree, hf_qds_bl, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(qds_tree, hf_qds_sb, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(qds_tree, hf_qds_nt, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(qds_tree, hf_qds_iv, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
(*offset)++;
}
/* ====================================================================
QDP: Quality descriptor for events of protection equipment
(separate octet)
==================================================================== */
#if 0
static void get_QDP( tvbuff_t *tvb _U_, guint8 *offset _U_, proto_tree *iec104_header_tree _U_ )
{
/* todo */
}
#endif
/* ====================================================================
VTI: Value with transient state indication
==================================================================== */
static void get_VTI( tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree)
{
proto_tree_add_item(iec104_header_tree, hf_vti, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(iec104_header_tree, hf_vti_tr, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
(*offset)++;
}
/* ====================================================================
NVA: Normalized value
==================================================================== */
static void get_NVA( tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree )
{
/* Normalized value F16[1..16]<-1..+1-2^-15> */
proto_tree_add_item(iec104_header_tree, hf_asdu_normval, tvb, *offset, 2, ENC_LITTLE_ENDIAN);
/* todo ... presentation as float +/- 1 (val/32767) ... */
(*offset) += 2;
}
static void get_NVAspt( tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree )
{
/* Normalized value F16[1..16]<-1..+1-2^-15> */
proto_tree_add_item(iec104_header_tree, hf_asdu_normval, tvb, *offset, 2, ENC_LITTLE_ENDIAN);
/* todo ... presentation as float +/- 1 */
(*offset) += 2;
}
/* ====================================================================
SVA: Scaled value
==================================================================== */
static void get_SVA( tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree )
{
/* Scaled value I16[1..16]<-2^15..+2^15-1> */
proto_tree_add_item(iec104_header_tree, hf_asdu_normval, tvb, *offset, 2, ENC_LITTLE_ENDIAN);
(*offset) += 2;
}
static void get_SVAspt( tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree )
{
/* Scaled value I16[1..16]<-2^15..+2^15-1> */
proto_tree_add_item(iec104_header_tree, hf_asdu_normval, tvb, *offset, 2, ENC_LITTLE_ENDIAN);
(*offset) += 2;
}
/* ====================================================================
"FLT": Short floating point number
==================================================================== */
static void get_FLT( tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree )
{
/* -------- IEEE 754 float value */
proto_tree_add_item(iec104_header_tree, hf_asdu_float, tvb, *offset, 4, ENC_LITTLE_ENDIAN);
(*offset) += 4;
}
static void get_FLTspt( tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree )
{
/* -------- IEEE 754 float value */
proto_tree_add_item(iec104_header_tree, hf_asdu_float, tvb, *offset, 4, ENC_LITTLE_ENDIAN);
(*offset) += 4;
}
/* ====================================================================
"BSI": Binary state information, 32 bit
==================================================================== */
static void get_BSI( tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree )
{
proto_tree_add_bits_item(iec104_header_tree, hf_asdu_bitstring, tvb, *offset*8, 32, ENC_BIG_ENDIAN);
(*offset) += 4;
}
static void get_BSIspt( tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree )
{
proto_tree_add_bits_item(iec104_header_tree, hf_asdu_bitstring, tvb, *offset*8, 32, ENC_BIG_ENDIAN);
(*offset) += 4;
}
/* ====================================================================
todo -- BCR: Binary counter reading
==================================================================== */
/* void get_BCR( guint8 *offset,
proto_tree *iec104_header_tree ); */
/* ====================================================================
todo -- SEP: Single event of protection equipment
==================================================================== */
#if 0
static void get_SEP( tvbuff_t *tvb _U_, guint8 *offset _U_, proto_tree *iec104_header_tree _U_ )
{
/* todo */
}
#endif
/* ====================================================================
QOS: Qualifier Of Set-point command
==================================================================== */
static void get_QOS( tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree )
{
proto_tree_add_item(iec104_header_tree, hf_qos_ql, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(iec104_header_tree, hf_qos_se, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
(*offset)++;
}
/* ====================================================================
SCO: Single Command (IEV 371-03-02)
==================================================================== */
static void get_SCO( tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree )
{
proto_item* ti;
proto_tree* sco_tree;
ti = proto_tree_add_item(iec104_header_tree, hf_sco, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
sco_tree = proto_item_add_subtree( ti, ett_sco );
proto_tree_add_item(sco_tree, hf_sco_on, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(sco_tree, hf_sco_qu, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(sco_tree, hf_sco_se, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
(*offset)++;
}
/* ====================================================================
DCO: Double Command (IEV 371-03-03)
==================================================================== */
static void get_DCO( tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree )
{
proto_item* ti;
proto_tree* dco_tree;
ti = proto_tree_add_item(iec104_header_tree, hf_dco, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
dco_tree = proto_item_add_subtree( ti, ett_dco );
proto_tree_add_item(dco_tree, hf_dco_on, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(dco_tree, hf_dco_qu, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(dco_tree, hf_dco_se, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
(*offset)++;
}
/* ====================================================================
RCO: Regulating step command (IEV 371-03-13)
==================================================================== */
static void get_RCO( tvbuff_t *tvb, guint8 *offset, proto_tree *iec104_header_tree )
{
proto_item* ti;
proto_tree* rco_tree;
ti = proto_tree_add_item(iec104_header_tree, hf_rco, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
rco_tree = proto_item_add_subtree( ti, ett_rco );
proto_tree_add_item(rco_tree, hf_rco_up, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(rco_tree, hf_rco_qu, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(rco_tree, hf_rco_se, tvb, *offset, 1, ENC_LITTLE_ENDIAN);
(*offset)++;
}
/* .... end Misc. functions for dissection of signal values */
/* Find the APDU 104 (APDU=APCI+ASDU) length.
Includes possible tvb_length-1 bytes that don't form an APDU */
static guint get_iec104apdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset)
{
guint8 Val;
guint32 Off;
for (Off= 0; Off <= tvb_reported_length(tvb)- 2; Off++) {
Val = tvb_get_guint8(tvb, offset+ Off);
if (Val == APCI_START) {
return (guint)(Off+ tvb_get_guint8(tvb, offset+ Off+ 1)+ 2);
}
}
return (guint)(tvb_reported_length(tvb));
}
/* Is is called twice: For 'Packet List' and for 'Packet Details' */
static void dissect_iec104asdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint Len = tvb_reported_length(tvb);
guint8 Bytex;
const char *cause_str;
size_t Ind;
struct asduheader asduh;
proto_item *it104, *ioa_item;
proto_tree *it104tree;
guint8 offset = 0; /* byte offset, signal dissection */
guint8 offset_start_ioa = 0; /* position first ioa */
guint8 i;
guint32 asdu_info_obj_addr = 0;
proto_item * itSignal = NULL;
proto_tree * trSignal;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "104asdu");
col_clear(pinfo->cinfo, COL_INFO);
it104 = proto_tree_add_item(tree, proto_iec104asdu, tvb, 0, -1, ENC_NA);
it104tree = proto_item_add_subtree(it104, ett_asdu);
asduh.TypeId = tvb_get_guint8(tvb, 0);
proto_tree_add_item(it104tree, hf_typeid, tvb, 0, 1, ENC_LITTLE_ENDIAN);
Bytex = tvb_get_guint8(tvb, 1);
asduh.NumIx = Bytex & 0x7F;
asduh.SQ = Bytex & F_SQ;
proto_tree_add_item(it104tree, hf_numix, tvb, 1, 1, ENC_LITTLE_ENDIAN);
if (asduh.NumIx > 1)
proto_tree_add_item(it104tree, hf_sq, tvb, 1, 1, ENC_LITTLE_ENDIAN);
asduh.TNCause = tvb_get_guint8(tvb, 2);
proto_tree_add_item(it104tree, hf_causetx, tvb, 2, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(it104tree, hf_nega, tvb, 2, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(it104tree, hf_test, tvb, 2, 1, ENC_LITTLE_ENDIAN);
asduh.OA = tvb_get_guint8(tvb, 3);
proto_tree_add_item(it104tree, hf_oa, tvb, 3, 1, ENC_LITTLE_ENDIAN);
asduh.Addr = tvb_get_letohs(tvb, 4);
proto_tree_add_item(it104tree, hf_addr, tvb, 4, 2, ENC_LITTLE_ENDIAN);
asduh.IOA = tvb_get_letoh24(tvb, 6);
proto_tree_add_item(it104tree, hf_ioa, tvb, 6, 3, ENC_LITTLE_ENDIAN);
cause_str = val_to_str(asduh.TNCause & F_CAUSE, causetx_types, " <CauseTx=%u>");
col_append_fstr( pinfo->cinfo, COL_INFO, "%u %s %u %s %s", asduh.Addr, pinfo->srcport == IEC104_PORT ? "->" : "<-",
asduh.OA, val_to_str(asduh.TypeId, asdu_types, "<TypeId=%u>"), cause_str);
if (asduh.TNCause & F_NEGA)
col_append_str( pinfo->cinfo, COL_INFO, "_NEGA");
if (asduh.TNCause & F_TEST)
col_append_str( pinfo->cinfo, COL_INFO, "_TEST");
if (asduh.TNCause & (F_TEST | F_NEGA)) {
for (Ind=strlen(cause_str); Ind< 7; Ind++)
col_append_str( pinfo->cinfo, COL_INFO, " ");
}
col_append_fstr( pinfo->cinfo, COL_INFO, " IOA=%d", asduh.IOA);
if (asduh.NumIx > 1) {
if (asduh.SQ == F_SQ)
col_append_fstr( pinfo->cinfo, COL_INFO, "-%d", asduh.IOA + asduh.NumIx - 1);
else
col_append_str( pinfo->cinfo, COL_INFO, ",...");
col_append_fstr( pinfo->cinfo, COL_INFO, " (%u) ", asduh.NumIx);
} else {
col_append_str( pinfo->cinfo, COL_INFO, " ");
}
col_set_fence(pinfo->cinfo, COL_INFO);
/* 'Signal Details': TREE */
offset = 6; /* offset position after DUI, already stored in asduh struct */
/* -------- get signal value and status based on ASDU type id */
switch (asduh.TypeId) {
case M_SP_NA_1:
case M_DP_NA_1:
case M_ST_NA_1:
case M_BO_NA_1:
case M_SP_TB_1:
case M_DP_TB_1:
case M_ST_TB_1:
case M_BO_TB_1:
case M_ME_NA_1:
case M_ME_NB_1:
case M_ME_NC_1:
case M_ME_ND_1:
case M_ME_TD_1:
case M_ME_TE_1:
case M_ME_TF_1:
case C_SC_NA_1:
case C_DC_NA_1:
case C_RC_NA_1:
case C_SE_NA_1:
case C_SE_NB_1:
case C_SE_NC_1:
case C_BO_NA_1:
case C_SC_TA_1:
case C_DC_TA_1:
case C_RC_TA_1:
case C_SE_TA_1:
case C_SE_TB_1:
case C_SE_TC_1:
case C_BO_TA_1:
case C_CS_NA_1:
/* create subtree for the signal values ... */
itSignal = proto_tree_add_text(it104tree, tvb, offset, -1, "Object values");
trSignal = proto_item_add_subtree( itSignal, ett_asdu_objects );
/* -- object values */
for(i = 0; i < asduh.NumIx; i++)
{
/* -------- First Information object address */
if (!i)
{
offset_start_ioa = offset;
/* -------- Information object address */
asdu_info_obj_addr = asduh.IOA;
ioa_item = proto_tree_add_uint(trSignal, hf_ioa, tvb, offset_start_ioa, 3, asdu_info_obj_addr);
/* check length */
if( Len < (guint)(offset+3) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
offset += 3; /* step over IOA bytes */
} else {
/* -------- following Information object address depending on SQ */
if (asduh.SQ) /* <=> SQ=1, info obj addr = startaddr++ */
{
asdu_info_obj_addr++;
ioa_item = proto_tree_add_uint(trSignal, hf_ioa, tvb, offset_start_ioa, 3, asdu_info_obj_addr);
} else { /* SQ=0, info obj addr given */
/* -------- Information object address */
/* check length */
if( Len < (guint)(offset+3) ) {
expert_add_info_format(pinfo, itSignal, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
ioa_item = get_InfoObjectAddress( &asdu_info_obj_addr, tvb, &offset, trSignal);
}
}
switch (asduh.TypeId) {
case M_SP_NA_1: /* 1 Single-point information */
/* check length */
if( Len < (guint)(offset+1) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_SIQ( tvb, &offset, trSignal );
break;
case M_DP_NA_1: /* 3 Double-point information */
/* check length */
if( Len < (guint)(offset+1) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_DIQ( tvb, &offset, trSignal );
break;
case M_ST_NA_1: /* 5 Step position information */
/* check length */
if( Len < (guint)(offset+2) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_VTI( tvb, &offset, trSignal );
get_QDS( tvb, &offset, trSignal );
break;
case M_BO_NA_1: /* 7 Bitstring of 32 bits */
/* check length */
if( Len < (guint)(offset+5) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_BSI( tvb, &offset, trSignal );
get_QDS( tvb, &offset, trSignal );
break;
case M_ME_NA_1: /* 9 Measured value, normalized value */
/* check length */
if( Len < (guint)(offset+3) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_NVA( tvb, &offset, trSignal );
get_QDS( tvb, &offset, trSignal );
break;
case M_ME_NB_1: /* 11 Measured value, scaled value */
/* check length */
if( Len < (guint)(offset+3) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_SVA( tvb, &offset, trSignal );
get_QDS( tvb, &offset, trSignal );
break;
case M_ME_NC_1: /* 13 Measured value, short floating point value */
/* check length */
if( Len < (guint)(offset+5) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_FLT( tvb, &offset, trSignal );
get_QDS( tvb, &offset, trSignal );
break;
case M_ME_ND_1: /* 21 Measured value, normalized value without quality descriptor */
/* check length */
if( Len < (guint)(offset+2) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_NVA( tvb, &offset, trSignal );
break;
case M_SP_TB_1: /* 30 Single-point information with time tag CP56Time2a */
/* check length */
if( Len < (guint)(offset+8) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_SIQ( tvb, &offset, trSignal );
get_CP56Time( tvb, &offset, trSignal );
break;
case M_DP_TB_1: /* 31 Double-point information with time tag CP56Time2a */
/* check length */
if( Len < (guint)(offset+8) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_DIQ( tvb, &offset, trSignal );
get_CP56Time( tvb, &offset, trSignal );
break;
case M_ST_TB_1: /* 32 Step position information with time tag CP56Time2a */
/* check length */
if( Len < (guint)(offset+9) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_VTI( tvb, &offset, trSignal );
get_QDS( tvb, &offset, trSignal );
get_CP56Time( tvb, &offset, trSignal );
break;
case M_BO_TB_1: /* 33 bitstring of 32 bit with time tag CP56Time2a */
/* check length */
if( Len < (guint)(offset+12) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_BSI( tvb, &offset, trSignal );
get_QDS( tvb, &offset, trSignal );
get_CP56Time( tvb, &offset, trSignal );
break;
case M_ME_TD_1: /* 34 Measured value, normalized value with time tag CP56Time2a */
/* check length */
if( Len < (guint)(offset+10) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_NVA( tvb, &offset, trSignal );
get_QDS( tvb, &offset, trSignal );
get_CP56Time( tvb, &offset, trSignal );
break;
case M_ME_TE_1: /* 35 Measured value, scaled value with time tag CP56Time2a */
/* check length */
if( Len < (guint)(offset+10) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_SVA( tvb, &offset, trSignal );
get_QDS( tvb, &offset, trSignal );
get_CP56Time( tvb, &offset, trSignal );
break;
case M_ME_TF_1: /* 36 Measured value, short floating point value with time tag CP56Time2a */
/* check length */
if( Len < (guint)(offset+12) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_FLT( tvb, &offset, trSignal );
get_QDS( tvb, &offset, trSignal );
get_CP56Time( tvb, &offset, trSignal );
break;
case C_SC_NA_1: /* 45 Single command */
/* check length */
if( Len < (guint)(offset+1) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_SCO( tvb, &offset, trSignal );
break;
case C_DC_NA_1: /* 46 Double command */
/* check length */
if( Len < (guint)(offset+1) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_DCO( tvb, &offset, trSignal );
break;
case C_RC_NA_1: /* 47 Regulating step command */
/* check length */
if( Len < (guint)(offset+1) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_RCO( tvb, &offset, trSignal );
break;
case C_SE_NA_1: /* 48 Set point command, normalized value */
/* check length */
if( Len < (guint)(offset+3) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_NVAspt( tvb, &offset, trSignal );
get_QOS( tvb, &offset, trSignal );
break;
case C_SE_NB_1: /* 49 Set point command, scaled value */
/* check length */
if( Len < (guint)(offset+3) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_SVAspt( tvb, &offset, trSignal );
get_QOS( tvb, &offset, trSignal );
break;
case C_SE_NC_1: /* 50 Set point command, short floating point value */
/* check length */
if( Len < (guint)(offset+5) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_FLTspt( tvb, &offset, trSignal );
get_QOS( tvb, &offset, trSignal );
break;
case C_BO_NA_1: /* 51 Bitstring of 32 bits */
/* check length */
if( Len < (guint)(offset+4) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_BSIspt( tvb, &offset, trSignal );
break;
case C_SC_TA_1: /* 58 Single command with time tag CP56Time2a */
/* check length */
if( Len < (guint)(offset+8) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_SCO( tvb, &offset, trSignal );
get_CP56Time( tvb, &offset, trSignal );
break;
case C_DC_TA_1: /* 59 Double command with time tag CP56Time2a */
/* check length */
if( Len < (guint)(offset+8) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_DCO( tvb, &offset, trSignal );
get_CP56Time( tvb, &offset, trSignal );
break;
case C_RC_TA_1: /* 60 Regulating step command with time tag CP56Time2a */
/* check length */
if( Len < (guint)(offset+8) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_RCO( tvb, &offset, trSignal );
get_CP56Time( tvb, &offset, trSignal );
break;
case C_SE_TA_1: /* 61 Set point command, normalized value with time tag CP56Time2a */
/* check length */
if( Len < (guint)(offset+10) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_NVAspt( tvb, &offset, trSignal );
get_QOS( tvb, &offset, trSignal );
get_CP56Time( tvb, &offset, trSignal );
break;
case C_SE_TB_1: /* 62 Set point command, scaled value with time tag CP56Time2a */
/* check length */
if( Len < (guint)(offset+10) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_SVAspt( tvb, &offset, trSignal );
get_QOS( tvb, &offset, trSignal );
get_CP56Time( tvb, &offset, trSignal );
break;
case C_SE_TC_1: /* 63 Set point command, short floating point value with time tag CP56Time2a */
/* check length */
if( Len < (guint)(offset+12) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_FLTspt( tvb, &offset, trSignal );
get_QOS( tvb, &offset, trSignal );
get_CP56Time( tvb, &offset, trSignal );
break;
case C_BO_TA_1: /* 64 Bitstring of 32 bits with time tag CP56Time2a */
/* check length */
if( Len < (guint)(offset+11) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_BSIspt( tvb, &offset, trSignal );
get_CP56Time( tvb, &offset, trSignal );
break;
case C_CS_NA_1: /* 103 clock synchronization command */
/* check length */
if( Len < (guint)(offset+7) ) {
expert_add_info_format(pinfo, ioa_item, PI_MALFORMED, PI_ERROR, "<ERR Short Asdu>");
return;
}
get_CP56Time( tvb, &offset, trSignal );
break;
default:
break;
} /* end 'switch (asduh.TypeId)' */
} /* end 'for(i = 0; i < dui.asdu_vsq_no_of_obj; i++)' */
break;
default:
break;
} /* end 'switch (asdu_typeid)' */
}
/* Is is called twice: For 'Packet List' and for 'Packet Details' */
static void dissect_iec104apci(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint TcpLen = tvb_reported_length(tvb);
guint8 Start = 0, len, type = 0, temp8;
guint8 temp16;
guint Off;
proto_item *it104, *ti;
proto_tree *it104tree;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "104apci");
col_clear(pinfo->cinfo, COL_INFO);
it104 = proto_tree_add_item(tree, proto_iec104apci, tvb, 0, -1, ENC_NA);
it104tree = proto_item_add_subtree(it104, ett_apci);
for (Off= 0; Off <= TcpLen- 2; Off++) {
Start = tvb_get_guint8(tvb, Off);
if (Start == APCI_START) {
if (Off > 0)
{
proto_tree_add_item(it104tree, hf_apcidata, tvb, 0, Off, ENC_NA);
col_append_fstr( pinfo->cinfo, COL_INFO, "<ERR prefix %u bytes> ", Off);
}
proto_item_set_len(it104, Off+ APCI_LEN);
proto_tree_add_text(it104tree, tvb, Off, 1, "START");
ti = proto_tree_add_item(it104tree, hf_apdulen, tvb, Off+ 1, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(it104tree, hf_apcitype, tvb, Off+ 2, 1, ENC_LITTLE_ENDIAN);
len = tvb_get_guint8(tvb, Off+ 1);
if (len < APDU_MIN_LEN) {
expert_add_info_format(pinfo, ti, PI_MALFORMED, PI_ERROR, "APDU less than %d bytes", APDU_MIN_LEN);
col_append_fstr( pinfo->cinfo, COL_INFO, "<ERR ApduLen=%u bytes> ", len);
return;
}
temp8 = tvb_get_guint8(tvb, Off+ 2);
type = temp8 & 0x03;
if (len <= APDU_MAX_LEN) {
col_append_fstr( pinfo->cinfo, COL_INFO, "%s %s (",
(pinfo->srcport == IEC104_PORT ? "->" : "<-"),
val_to_str_const(type, apci_types, "<ERR>"));
}
else {
col_append_fstr( pinfo->cinfo, COL_INFO, "<ERR ApduLen=%u bytes> ", len);
}
switch(type) {
case I_TYPE:
case I_TYPE2:
temp16 = tvb_get_letohs(tvb, Off+ 2) >> 1;
col_append_fstr( pinfo->cinfo, COL_INFO, "%2.2d,", temp16);
proto_tree_add_uint(it104tree, hf_apcitx, tvb, Off+2, 2, temp16);
case S_TYPE:
temp16 = tvb_get_letohs(tvb, Off+ 4) >> 1;
col_append_fstr( pinfo->cinfo, COL_INFO, "%2.2d) ", temp16);
proto_tree_add_uint(it104tree, hf_apcirx, tvb, Off+4, 2, temp16);
break;
case U_TYPE:
col_append_fstr( pinfo->cinfo, COL_INFO, "%s) ", val_to_str_const((temp8 >> 2) & 0x3F, u_types, "<ERR>"));
proto_tree_add_item(it104tree, hf_apciutype, tvb, Off+ 2, 1, ENC_LITTLE_ENDIAN);
break;
}
/* Don't search more the APCI_START */
break;
}
}
if (Start != APCI_START) {
/* Everything is bad (no APCI found) */
proto_tree_add_item(it104tree, hf_apcidata, tvb, 0, Off, ENC_NA);
return;
}
if ((type == I_TYPE) || (type == I_TYPE2)) {
call_dissector(iec104asdu_handle, tvb_new_subset(tvb, Off+ APCI_LEN, -1, len - APCI_DATA_LEN), pinfo, tree);
} else {
col_set_fence(pinfo->cinfo, COL_INFO);
}
}
static void dissect_iec104reas(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
/* 5th parameter = 6 = minimum bytes received to calculate the length.
* (Not 2 in order to find more APCIs in case of 'noisy' bytes between the APCIs)
*/
tcp_dissect_pdus(tvb, pinfo, tree, TRUE, APCI_LEN,
get_iec104apdu_len, dissect_iec104apci);
}
/* The protocol has two subprotocols: Register APCI */
void
proto_register_iec104apci(void)
{
static hf_register_info hf_ap[] = {
{ &hf_apdulen,
{ "ApduLen", "104apci.apdulen", FT_UINT8, BASE_DEC, NULL, 0x0,
"APDU Len", HFILL }},
{ &hf_apcitype,
{ "Type", "104apci.type", FT_UINT8, BASE_HEX, VALS(apci_types), 0x03,
"APCI type", HFILL }},
{ &hf_apciutype,
{ "UType", "104apci.utype", FT_UINT8, BASE_HEX, VALS(u_types), 0xFC,
"Apci U type", HFILL }},
{ &hf_apcitx,
{ "Tx", "104apci.tx", FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }},
{ &hf_apcirx,
{ "Rx", "104apci.rx", FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }},
{ &hf_apcidata,
{ "Data", "104apci.data", FT_BYTES, BASE_NONE, NULL, 0,
NULL, HFILL }},
};
static gint *ett_ap[] = {
&ett_apci,
};
proto_iec104apci = proto_register_protocol(
"IEC 60870-5-104-Apci",
"104apci",
"104apci"
);
proto_register_field_array(proto_iec104apci, hf_ap, array_length(hf_ap));
proto_register_subtree_array(ett_ap, array_length(ett_ap));
}
/* The protocol has two subprotocols: Register ASDU */
void
proto_register_iec104asdu(void)
{
static hf_register_info hf_as[] = {
{ &hf_addr,
{ "Addr", "104asdu.addr", FT_UINT16, BASE_DEC, NULL, 0x0,
"Common Address of Asdu", HFILL }},
{ &hf_oa,
{ "OA", "104asdu.oa", FT_UINT8, BASE_DEC, NULL, 0x0,
"Originator Address", HFILL }},
{ &hf_typeid,
{ "TypeId", "104asdu.typeid", FT_UINT8, BASE_DEC, VALS(asdu_types), 0x0,
"Asdu Type Id", HFILL }},
{ &hf_causetx,
{ "CauseTx", "104asdu.causetx", FT_UINT8, BASE_DEC, VALS(causetx_types), F_CAUSE,
"Cause of Transmision", HFILL }},
{ &hf_nega,
{ "Negative", "104asdu.nega", FT_BOOLEAN, 8, NULL, F_NEGA,
NULL, HFILL }},
{ &hf_test,
{ "Test", "104asdu.test", FT_BOOLEAN, 8, NULL, F_TEST,
NULL, HFILL }},
{ &hf_ioa,
{ "IOA", "104asdu.ioa", FT_UINT24, BASE_DEC, NULL, 0x0,
"Information Object Address", HFILL }},
{ &hf_numix,
{ "NumIx", "104asdu.numix", FT_UINT8, BASE_DEC, NULL, 0x7F,
"Number of Information Objects/Elements", HFILL }},
{ &hf_sq,
{ "SQ", "104asdu.sq", FT_BOOLEAN, 8, NULL, F_SQ,
"Sequence", HFILL }},
{ &hf_cp56time,
{ "CP56Time", "104asdu.cp56time", FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL, NULL, 0,
NULL, HFILL }},
{ &hf_siq,
{ "SIQ", "104asdu.siq", FT_UINT8, BASE_HEX, NULL, 0,
NULL, HFILL }},
{ &hf_siq_on,
{ "SQ", "104asdu.siq.on", FT_BOOLEAN, 8, TFS(&tfs_on_off), 0x01,
"SIQ SQ", HFILL }},
{ &hf_siq_bl,
{ "BL", "104asdu.siq.bl", FT_BOOLEAN, 8, TFS(&tfs_blocked_not_blocked), 0x02,
"SIQ BL", HFILL }},
{ &hf_siq_sb,
{ "SB", "104asdu.siq.sb", FT_BOOLEAN, 8, TFS(&tfs_substituted_not_substituted), 0x04,
"SIQ SB", HFILL }},
{ &hf_siq_nt,
{ "NT", "104asdu.siq.nt", FT_BOOLEAN, 8, TFS(&tfs_not_topical_topical), 0x08,
"SIQ NT", HFILL }},
{ &hf_siq_iv,
{ "IV", "104asdu.siq.iv", FT_BOOLEAN, 8, TFS(&tfs_invalid_valid), 0x10,
"SIQ IV", HFILL }},
{ &hf_diq,
{ "DIQ", "104asdu.diq", FT_UINT8, BASE_HEX, NULL, 0,
NULL, HFILL }},
{ &hf_diq_value,
{ "Value", "104asdu.diq.value", FT_UINT8, BASE_DEC, VALS(diq_types), 0x03,
"DIQ Value", HFILL }},
{ &hf_diq_bl,
{ "BL", "104asdu.diq.bl", FT_BOOLEAN, 8, TFS(&tfs_blocked_not_blocked), 0x10,
"DIQ BL", HFILL }},
{ &hf_diq_sb,
{ "SB", "104asdu.diq.sb", FT_BOOLEAN, 8, TFS(&tfs_substituted_not_substituted), 0x20,
"DIQ SB", HFILL }},
{ &hf_diq_nt,
{ "NT", "104asdu.diq.nt", FT_BOOLEAN, 8, TFS(&tfs_not_topical_topical), 0x40,
"DIQ NT", HFILL }},
{ &hf_diq_iv,
{ "IV", "104asdu.diq.iv", FT_BOOLEAN, 8, TFS(&tfs_invalid_valid), 0x80,
"DIQ IV", HFILL }},
{ &hf_qds,
{ "QDS", "104asdu.qds", FT_UINT8, BASE_HEX, NULL, 0,
NULL, HFILL }},
{ &hf_qds_ov,
{ "OV", "104asdu.qds.ov", FT_BOOLEAN, 8, TFS(&tfs_overflow_no_overflow), 0x01,
"QDS OV", HFILL }},
{ &hf_qds_bl,
{ "BL", "104asdu.qds.bl", FT_BOOLEAN, 8, TFS(&tfs_blocked_not_blocked), 0x02,
"QDS BL", HFILL }},
{ &hf_qds_sb,
{ "SB", "104asdu.qds.sb", FT_BOOLEAN, 8, TFS(&tfs_substituted_not_substituted), 0x04,
"QDS SB", HFILL }},
{ &hf_qds_nt,
{ "NT", "104asdu.qds.nt", FT_BOOLEAN, 8, TFS(&tfs_not_topical_topical), 0x08,
"QDS NT", HFILL }},
{ &hf_qds_iv,
{ "IV", "104asdu.qds.iv", FT_BOOLEAN, 8, TFS(&tfs_invalid_valid), 0x10,
"QDS IV", HFILL }},
{ &hf_vti,
{ "VTI", "104asdu.vti", FT_UINT8, BASE_DEC, NULL, 0x7F,
NULL, HFILL }},
{ &hf_vti_tr,
{ "VTI Transient", "104asdu.qds.ov", FT_BOOLEAN, 8, TFS(&tfs_yes_no), 0x80,
NULL, HFILL }},
{ &hf_qos_ql,
{ "QOS Qualifier", "104asdu.qos_ql", FT_UINT8, BASE_DEC, NULL, 0x7F,
NULL, HFILL }},
{ &hf_qos_se,
{ "QOS S/E", "104asdu.qos_se", FT_BOOLEAN, 8, TFS(&tfs_select_execute), 0x80,
NULL, HFILL }},
{ &hf_sco,
{ "SCO", "104asdu.sco", FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL }},
{ &hf_sco_on,
{ "SCO ON/OFF", "104asdu.sco.on", FT_BOOLEAN, 8, TFS(&tfs_on_off), 0x01,
NULL, HFILL }},
{ &hf_sco_qu,
{ "SCO QU", "104asdu.sco.qu", FT_UINT8, BASE_DEC, VALS(qos_qu_types), 0x70,
NULL, HFILL }},
{ &hf_sco_se,
{ "SCO S/E", "104asdu.sco.se", FT_BOOLEAN, 8, TFS(&tfs_select_execute), 0x80,
NULL, HFILL }},
{ &hf_dco,
{ "DCO", "104asdu.dco", FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL }},
{ &hf_dco_on,
{ "DCO ON/OFF", "104asdu.dco.on", FT_UINT8, BASE_DEC, VALS(dco_on_types), 0x03,
NULL, HFILL }},
{ &hf_dco_qu,
{ "DCO QU", "104asdu.dco.qu", FT_UINT8, BASE_DEC, VALS(qos_qu_types), 0x70,
NULL, HFILL }},
{ &hf_dco_se,
{ "DCO S/E", "104asdu.dco.se", FT_BOOLEAN, 8, TFS(&tfs_select_execute), 0x80,
NULL, HFILL }},
{ &hf_rco,
{ "RCO", "104asdu.rco", FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL }},
{ &hf_rco_up,
{ "RCO UP/DOWN", "104asdu.rco.up", FT_UINT8, BASE_DEC, VALS(rco_up_types), 0x03,
NULL, HFILL }},
{ &hf_rco_qu,
{ "RCO QU", "104asdu.rco.qu", FT_UINT8, BASE_DEC, VALS(qos_qu_types), 0x70,
NULL, HFILL }},
{ &hf_rco_se,
{ "RCO S/E", "104asdu.rco.se", FT_BOOLEAN, 8, TFS(&tfs_select_execute), 0x80,
NULL, HFILL }},
{ &hf_asdu_bitstring,
{ "Object value", "104asdu.bitstring", FT_UINT32, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_asdu_float,
{ "Object value", "104asdu.float", FT_FLOAT, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_asdu_normval,
{ "Object value", "104asdu.normval", FT_INT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
};
static gint *ett_as[] = {
&ett_asdu,
&ett_asdu_objects,
&ett_siq,
&ett_diq,
&ett_qds,
&ett_sco,
&ett_dco,
&ett_rco
};
proto_iec104asdu = proto_register_protocol(
"IEC 60870-5-104-Asdu",
"104asdu",
"104asdu"
);
proto_register_field_array(proto_iec104asdu, hf_as, array_length(hf_as));
proto_register_subtree_array(ett_as, array_length(ett_as));
}
/* The registration hand-off routine */
void
proto_reg_handoff_iec104(void)
{
dissector_handle_t iec104apci_handle;
iec104apci_handle = create_dissector_handle(dissect_iec104reas, proto_iec104apci);
iec104asdu_handle = create_dissector_handle(dissect_iec104asdu, proto_iec104asdu);
dissector_add_uint("tcp.port", IEC104_PORT, iec104apci_handle);
}
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