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/* packet-sv.c
* Routines for IEC 61850 Sampled Vales packet dissection
* Michael Bernhard 2008
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/asn1.h>
#include <epan/etypes.h>
#include <epan/expert.h>
#include "packet-ber.h"
#include "packet-acse.h"
#include "tap.h"
#include "packet-sv.h"
#define PNAME "IEC61850 Sampled Values"
#define PSNAME "SV"
#define PFNAME "sv"
/* see IEC61850-8-1 8.2 */
#define Q_VALIDITY_GOOD (0x0U << 0)
#define Q_VALIDITY_INVALID (0x1U << 0)
#define Q_VALIDITY_QUESTIONABLE (0x3U << 0)
#define Q_VALIDITY_MASK (0x3U << 0)
#define Q_OVERFLOW (1U << 2)
#define Q_OUTOFRANGE (1U << 3)
#define Q_BADREFERENCE (1U << 4)
#define Q_OSCILLATORY (1U << 5)
#define Q_FAILURE (1U << 6)
#define Q_OLDDATA (1U << 7)
#define Q_INCONSISTENT (1U << 8)
#define Q_INACCURATE (1U << 9)
#define Q_SOURCE_PROCESS (0U << 10)
#define Q_SOURCE_SUBSTITUTED (1U << 10)
#define Q_SOURCE_MASK (1U << 10)
#define Q_TEST (1U << 11)
#define Q_OPERATORBLOCKED (1U << 12)
/* see UCA Implementation Guideline for IEC 61850-9-2 */
#define Q_DERIVED (1U << 13)
void proto_register_sv(void);
void proto_reg_handoff_sv(void);
/* Data for SV tap */
static int sv_tap = -1;
static sv_frame_data sv_data;
/* Initialize the protocol and registered fields */
static int proto_sv = -1;
static int hf_sv_appid = -1;
static int hf_sv_length = -1;
static int hf_sv_reserve1 = -1;
static int hf_sv_reserve2 = -1;
#include "packet-sv-hf.c"
/* Initialize the subtree pointers */
static int ett_sv = -1;
static int ett_phsmeas = -1;
static int ett_phsmeas_q = -1;
#include "packet-sv-ett.c"
static expert_field ei_sv_mal_utctime = EI_INIT;
static expert_field ei_sv_zero_pdu = EI_INIT;
#include "packet-sv-fn.c"
/*
* Dissect SV PDUs inside a PPDU.
*/
static void
dissect_sv(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
{
int offset = 0;
int old_offset;
proto_item *item;
proto_tree *tree;
asn1_ctx_t asn1_ctx;
asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
item = proto_tree_add_item(parent_tree, proto_sv, tvb, 0, -1, ENC_NA);
tree = proto_item_add_subtree(item, ett_sv);
col_set_str(pinfo->cinfo, COL_PROTOCOL, PNAME);
col_clear(pinfo->cinfo, COL_INFO);
/* APPID */
if (tree && tvb_reported_length_remaining(tvb, offset) >= 2)
proto_tree_add_item(tree, hf_sv_appid, tvb, offset, 2, ENC_BIG_ENDIAN);
/* Length */
if (tree && tvb_reported_length_remaining(tvb, offset) >= 4)
proto_tree_add_item(tree, hf_sv_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
/* Reserved 1 */
if (tree && tvb_reported_length_remaining(tvb, offset) >= 6)
proto_tree_add_item(tree, hf_sv_reserve1, tvb, offset + 4, 2, ENC_BIG_ENDIAN);
/* Reserved 2 */
if (tree && tvb_reported_length_remaining(tvb, offset) >= 8)
proto_tree_add_item(tree, hf_sv_reserve2, tvb, offset + 6, 2, ENC_BIG_ENDIAN);
offset = 8;
while (tree && tvb_reported_length_remaining(tvb, offset) > 0){
old_offset = offset;
offset = dissect_sv_SampledValues(FALSE, tvb, offset, &asn1_ctx , tree, -1);
if (offset == old_offset) {
proto_tree_add_expert(tree, pinfo, &ei_sv_zero_pdu, tvb, offset, -1);
break;
}
}
if(tree)
tap_queue_packet(sv_tap, pinfo, &sv_data);
}
/*--- proto_register_sv -------------------------------------------*/
void proto_register_sv(void) {
/* List of fields */
static hf_register_info hf[] = {
{ &hf_sv_appid,
{ "APPID", "sv.appid", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sv_length,
{ "Length", "sv.length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_sv_reserve1,
{ "Reserved 1", "sv.reserve1", FT_UINT16, BASE_HEX_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_sv_reserve2,
{ "Reserved 2", "sv.reserve2", FT_UINT16, BASE_HEX_DEC, NULL, 0x0, NULL, HFILL }},
#if 0
{ &hf_sv_phmeas_instmag_i,
{ "value", "sv.meas_value", FT_INT32, BASE_DEC, NULL, 0x0, NULL, HFILL}},
{ &hf_sv_phsmeas_q,
{ "quality", "sv.meas_quality", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},
{ &hf_sv_phsmeas_q_validity,
{ "validity", "sv.meas_quality.validity", FT_UINT32, BASE_HEX, VALS(sv_q_validity_vals), Q_VALIDITY_MASK, NULL, HFILL}},
{ &hf_sv_phsmeas_q_overflow,
{ "overflow", "sv.meas_quality.overflow", FT_BOOLEAN, 32, NULL, Q_OVERFLOW, NULL, HFILL}},
{ &hf_sv_phsmeas_q_outofrange,
{ "out of range", "sv.meas_quality.outofrange", FT_BOOLEAN, 32, NULL, Q_OUTOFRANGE, NULL, HFILL}},
{ &hf_sv_phsmeas_q_badreference,
{ "bad reference", "sv.meas_quality.badreference", FT_BOOLEAN, 32, NULL, Q_BADREFERENCE, NULL, HFILL}},
{ &hf_sv_phsmeas_q_oscillatory,
{ "oscillatory", "sv.meas_quality.oscillatory", FT_BOOLEAN, 32, NULL, Q_OSCILLATORY, NULL, HFILL}},
{ &hf_sv_phsmeas_q_failure,
{ "failure", "sv.meas_quality.failure", FT_BOOLEAN, 32, NULL, Q_FAILURE, NULL, HFILL}},
{ &hf_sv_phsmeas_q_olddata,
{ "old data", "sv.meas_quality.olddata", FT_BOOLEAN, 32, NULL, Q_OLDDATA, NULL, HFILL}},
{ &hf_sv_phsmeas_q_inconsistent,
{ "inconsistent", "sv.meas_quality.inconsistent", FT_BOOLEAN, 32, NULL, Q_INCONSISTENT, NULL, HFILL}},
{ &hf_sv_phsmeas_q_inaccurate,
{ "inaccurate", "sv.meas_quality.inaccurate", FT_BOOLEAN, 32, NULL, Q_INACCURATE, NULL, HFILL}},
{ &hf_sv_phsmeas_q_source,
{ "source", "sv.meas_quality.source", FT_UINT32, BASE_HEX, VALS(sv_q_source_vals), Q_SOURCE_MASK, NULL, HFILL}},
{ &hf_sv_phsmeas_q_test,
{ "test", "sv.meas_quality.teset", FT_BOOLEAN, 32, NULL, Q_TEST, NULL, HFILL}},
{ &hf_sv_phsmeas_q_operatorblocked,
{ "operator blocked", "sv.meas_quality.operatorblocked", FT_BOOLEAN, 32, NULL, Q_OPERATORBLOCKED, NULL, HFILL}},
{ &hf_sv_phsmeas_q_derived,
{ "derived", "sv.meas_quality.derived", FT_BOOLEAN, 32, NULL, Q_DERIVED, NULL, HFILL}},
#endif
#include "packet-sv-hfarr.c"
};
/* List of subtrees */
static gint *ett[] = {
&ett_sv,
&ett_phsmeas,
&ett_phsmeas_q,
#include "packet-sv-ettarr.c"
};
static ei_register_info ei[] = {
{ &ei_sv_mal_utctime, { "sv.malformed.utctime", PI_MALFORMED, PI_WARN, "BER Error: malformed UTCTime encoding", EXPFILL }},
{ &ei_sv_zero_pdu, { "sv.zero_pdu", PI_PROTOCOL, PI_ERROR, "Internal error, zero-byte SV PDU", EXPFILL }},
};
expert_module_t* expert_sv;
/* Register protocol */
proto_sv = proto_register_protocol(PNAME, PSNAME, PFNAME);
register_dissector("sv", dissect_sv, proto_sv);
/* Register fields and subtrees */
proto_register_field_array(proto_sv, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_sv = expert_register_protocol(proto_sv);
expert_register_field_array(expert_sv, ei, array_length(ei));
/* Register tap */
sv_tap = register_tap("sv");
}
/*--- proto_reg_handoff_sv --- */
void proto_reg_handoff_sv(void) {
dissector_handle_t sv_handle;
sv_handle = find_dissector("sv");
dissector_add_uint("ethertype", ETHERTYPE_IEC61850_SV, sv_handle);
}
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