/* packet-iec104.c * Routines for IEC-60870-5-104 (iec104) Protocol disassembly * * * $Id$ * * Copyright (c) 2008 by Joan Ramio * Joan is a masculine catalan name. Search the Internet for Joan Pujol (alias Garbo). * * Wireshark - Network traffic analyzer * By Gerald Combs * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include #include /* IEC-104 comment: Fields are little endian. */ #define MAXS 256 static dissector_handle_t iec104asdu_handle; /******* Utility to add to 'value_string.c' *******/ /* Tries to match val against each element in the value_string array vs. Returns the associated string length on a match. Returns 100, on failure. */ guint8 val_to_strlen(guint32 val, const value_string *vs); guint8 val_to_strlen(guint32 val, const value_string *vs) { const gchar *ret; ret = match_strval(val, vs); if (ret != NULL) return strlen(ret); return 100; } /* the asdu header structure */ struct asduheader { guint8 AddrLow; guint8 AddrHigh; guint8 OA; guint8 TypeId; guint8 TNCause; guint32 IOA; guint8 NumIx; guint8 SQ; }; /* the apci header structure */ struct apciheader { guint8 ApduLen; guint8 Type; guint8 UType; guint16 Tx; guint16 Rx; }; static guint iec104port = 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 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 */ #define I_TYPE 0 #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" }, { 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 } }; /* Protocol fields to be filtered */ static int hf_apdulen = -1; static int hf_apcitype = -1; static int hf_apciutype = -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 gint ett_apci = -1; static gint ett_asdu = -1; /* 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_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_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) { guint8 Len = tvb_length(tvb); /* Investigate also: 'reported Length' */ guint8 Bytex = 0; guint8 Ind = 0; struct asduheader * asduh; char * res = NULL; proto_item * it104 = NULL; proto_tree * trHead; if (!(check_col(pinfo->cinfo, COL_INFO) || tree)) return; /* Be sure that the function is only called twice */ asduh = ep_alloc(sizeof(struct asduheader)); res = ep_alloc(MAXS); res[0] = '\0'; if (check_col(pinfo->cinfo, COL_PROTOCOL)) { col_set_str(pinfo->cinfo, COL_PROTOCOL, "104asdu"); } if (check_col(pinfo->cinfo, COL_INFO)) { col_clear(pinfo->cinfo, COL_INFO); } /*** *** START: Common to 'Packet List' and 'Packet Details' *** ***/ if (Len >= ASDU_HEAD_LEN) { /* Get fields */ asduh->AddrLow = tvb_get_guint8(tvb, 4); asduh->AddrHigh = tvb_get_guint8(tvb, 5); asduh->OA = tvb_get_guint8(tvb, 3); asduh->TypeId = tvb_get_guint8(tvb, 0); asduh->TNCause = tvb_get_guint8(tvb, 2); asduh->IOA = tvb_get_letoh24(tvb, 6); Bytex = tvb_get_guint8(tvb, 1); asduh->NumIx = Bytex & 0x7F; asduh->SQ = Bytex & F_SQ; /* Build common string for 'Packet List' and 'Packet Details' */ g_snprintf(res, MAXS, "%u,%u%s%u ", asduh->AddrLow, asduh->AddrHigh, pinfo->srcport == iec104port ? "->" : "<-", asduh->OA); g_strlcat(res, val_to_str(asduh->TypeId, asdu_types, ""), MAXS); g_strlcat(res, " ", MAXS); g_strlcat(res, val_to_str(asduh->TNCause & F_CAUSE, causetx_types, " "), MAXS); if (asduh->TNCause & F_NEGA) g_strlcat(res, "_NEGA", MAXS); if (asduh->TNCause & F_TEST) g_strlcat(res, "_TEST", MAXS); if (asduh->TNCause & (F_TEST | F_NEGA)) { Bytex = val_to_strlen(asduh->TNCause & F_CAUSE, causetx_types); for (Ind=Bytex; Ind< 7; Ind++) g_strlcat(res, " ", MAXS); } g_snprintf(res+strlen(res), MAXS-strlen(res), " IOA=%d", asduh->IOA); if (asduh->NumIx > 1) { if (asduh->SQ == F_SQ) g_snprintf(res+strlen(res), MAXS-strlen(res), "-%d", asduh->IOA+ asduh->NumIx- 1); else g_strlcat(res, ",...", MAXS); g_snprintf(res+strlen(res), MAXS-strlen(res), " (%u)", asduh->NumIx); } } else { g_snprintf(res, MAXS, "", Len); } g_strlcat(res, " ", MAXS); /* We add an space to separate possible APCIs/ASDUs in the same packet */ /*** *** END: Common to 'Packet List' and 'Packet Details' *** ***/ /*** *** DISSECT 'Packet List' *** ***/ if (check_col(pinfo->cinfo, COL_INFO)) { col_add_str(pinfo->cinfo, COL_INFO, res); col_set_fence(pinfo->cinfo, COL_INFO); } if(!tree) return; /*** *** DISSECT 'Packet Details' *** ***/ it104 = proto_tree_add_item(tree, proto_iec104asdu, tvb, 0, -1, FALSE); /* 'Packet Details': ROOT ITEM */ proto_item_append_text(it104, ": %s'%s'", res, Len >= ASDU_HEAD_LEN ? val_to_str(asduh->TypeId, asdu_lngtypes, "") : ""); /* 'Packet Details': TREE */ if (Len < ASDU_HEAD_LEN) return; trHead = proto_item_add_subtree(it104, ett_asdu); /* Remember: add_uint, add_boolean, _add_text: value from last parameter. add_item: value from tvb. */ proto_tree_add_uint(trHead, hf_typeid, tvb, 0, 1, asduh->TypeId); proto_tree_add_uint(trHead, hf_numix, tvb, 1, 1, asduh->NumIx); proto_tree_add_uint(trHead, hf_causetx, tvb, 2, 1, asduh->TNCause & F_CAUSE); proto_tree_add_boolean(trHead, hf_nega, tvb, 2, 1, asduh->TNCause); proto_tree_add_boolean(trHead, hf_test, tvb, 2, 1, asduh->TNCause); proto_tree_add_uint(trHead, hf_oa, tvb, 3, 1, asduh->OA); proto_tree_add_uint(trHead, hf_addr, tvb, 4, 2, asduh->AddrLow+ 256* asduh->AddrHigh); proto_tree_add_uint(trHead, hf_ioa, tvb, 6, 3, asduh->IOA); if (asduh->NumIx > 1) proto_tree_add_boolean(trHead, hf_sq, tvb, 1, 1, asduh->SQ); } /* Is is called twice: For 'Packet List' and for 'Packet Details' */ static void dissect_iec104apci(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { guint8 TcpLen = tvb_length(tvb); guint16 Brossa = 0; guint8 Start; guint8 Off; guint8 Byte1 = 0; struct apciheader * apcih; char * res = NULL; proto_item * it104 = NULL; proto_tree * trHead; if (!(check_col(pinfo->cinfo, COL_INFO) || tree)) return; /* Be sure that the function is only called twice */ apcih = ep_alloc(sizeof(struct apciheader)); res = ep_alloc(MAXS); res[0] = '\0'; if (check_col(pinfo->cinfo, COL_PROTOCOL)) { col_set_str(pinfo->cinfo, COL_PROTOCOL, "104apci"); } if (check_col(pinfo->cinfo, COL_INFO)) { col_clear(pinfo->cinfo, COL_INFO); } /*** *** START: Common to 'Packet List' and 'Packet Details' *** ***/ Start = 0; for (Off= 0; Off <= TcpLen- 2; Off++) { Start = tvb_get_guint8(tvb, Off); if (Start == APCI_START) { Brossa = Off; apcih->ApduLen = tvb_get_guint8(tvb, Off+ 1); if (apcih->ApduLen >= APDU_MIN_LEN) { Byte1 = tvb_get_guint8(tvb, Off+ 2); apcih->Type = Byte1 & 0x03; /* Type I is only lowest bit set to 0 */ if (apcih->Type == 2) apcih->Type = 0; switch(apcih->Type) { case I_TYPE: apcih->Tx = tvb_get_letohs(tvb, Off+ 2) >> 1; case S_TYPE: apcih->Rx = tvb_get_letohs(tvb, Off+ 4) >> 1; break; case U_TYPE: apcih->UType = (Byte1 & 0xFC); /* Don't shift */ break; } } else { /* WireShark can crash if we process packets with length less than expected (6). We consider that everything is bad */ Brossa = TcpLen; } /* Don't search more the APCI_START */ break; } } if (Start != APCI_START) { /* Everything is bad (no APCI found) */ Brossa = TcpLen; } /* Construir string comu a List i Details */ if (Brossa > 0) g_snprintf(res, MAXS, " ", Brossa); if (Brossa != TcpLen) { if (apcih->ApduLen <= APDU_MAX_LEN) { /* APCI in 'Paquet List' */ g_snprintf(res+strlen(res), MAXS-strlen(res), "%s%s(", pinfo->srcport == iec104port ? "->" : "<-", val_to_str(apcih->Type, apci_types, "")); switch(apcih->Type) { /* APCI in 'Packet List' */ case I_TYPE: g_snprintf(res+strlen(res), MAXS-strlen(res), "%d,", apcih->Tx); case S_TYPE: g_snprintf(res+strlen(res), MAXS-strlen(res), "%d)", apcih->Rx); /* Align first packets */ if (apcih->Tx < 10) g_strlcat(res, " ", MAXS); if (apcih->Rx < 10) g_strlcat(res, " ", MAXS); break; case U_TYPE: g_snprintf(res+strlen(res), MAXS-strlen(res), "%s)", val_to_str(apcih->UType >> 2, u_types, "")); break; } if (apcih->Type != I_TYPE && apcih->ApduLen > APDU_MIN_LEN) g_snprintf(res+strlen(res), MAXS-strlen(res), " ", apcih->ApduLen- APDU_MIN_LEN); } else { g_snprintf(res+strlen(res), MAXS-strlen(res), " ", apcih->ApduLen); } } g_strlcat(res, " ", MAXS); /* We add an space to separate possible APCIs/ASDUs in the same packet */ /*** *** END: Common to 'Packet List' and 'Packet Details' *** ***/ /*** *** Dissect 'Packet List' *** ***/ if (check_col(pinfo->cinfo, COL_INFO)) { col_add_str(pinfo->cinfo, COL_INFO, res); if(apcih->Type == I_TYPE && Brossa != TcpLen) { call_dissector(iec104asdu_handle, tvb_new_subset(tvb, Off+ APCI_LEN, -1, apcih->ApduLen- APCI_LEN), pinfo, tree); } else { col_set_fence(pinfo->cinfo, COL_INFO); } } if(!tree) return; /*** *** DISSECT 'Packet Details' *** ***/ it104 = proto_tree_add_item(tree, proto_iec104apci, tvb, 0, Off+ APCI_LEN, FALSE); /* 'Packet Details': ROOT ITEM */ proto_item_append_text(it104, ": %s", res); if(Brossa == TcpLen) return; /* Don't call ASDU dissector if it was called before */ if(apcih->Type == I_TYPE && (!check_col(pinfo->cinfo, COL_INFO))) call_dissector(iec104asdu_handle, tvb_new_subset(tvb, Off+ APCI_LEN, -1, apcih->ApduLen- APCI_LEN), pinfo, tree); /* 'Packet Details': TREE */ trHead = proto_item_add_subtree(it104, ett_apci); /* Remember: add_uint, add_boolean, _add_text: value from last parameter. add_item: value from tvb. */ proto_tree_add_uint(trHead, hf_apdulen, tvb, Off+ 1, 1, apcih->ApduLen); proto_tree_add_uint(trHead, hf_apcitype, tvb, Off+ 2, 1, apcih->Type); switch(apcih->Type){ case U_TYPE: proto_tree_add_uint(trHead, hf_apciutype, tvb, Off+ 2, 1, apcih->UType); /* Don't shift the value */ break; } } 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, { "ApciType", "104apci.type", FT_UINT8, BASE_HEX, VALS(apci_types), 0x03, "APCI type", HFILL }}, { &hf_apciutype, { "ApciUType", "104apci.utype", FT_UINT8, BASE_HEX, VALS(u_types), 0xFC, "Apci U type", 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), 0x3F, "Cause of Transmision", HFILL }}, { &hf_nega, { "Negative", "104asdu.nega", FT_BOOLEAN, 8, NULL, F_NEGA, "Negative", HFILL }}, { &hf_test, { "Test", "104asdu.test", FT_BOOLEAN, 8, NULL, F_TEST, "Test", 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 }}, }; static gint *ett_as[] = { &ett_asdu, }; 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("tcp.port", iec104port, iec104apci_handle); }