forked from osmocom/wireshark
328 lines
9.4 KiB
C
328 lines
9.4 KiB
C
/* packet-sv.c
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* Routines for IEC 61850 Sampled Values packet dissection
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* Michael Bernhard 2008
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/asn1.h>
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#include <epan/etypes.h>
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#include <epan/expert.h>
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#include <epan/prefs.h>
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#include "packet-ber.h"
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#include "packet-acse.h"
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#include "tap.h"
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#include "packet-sv.h"
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#define PNAME "IEC61850 Sampled Values"
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#define PSNAME "SV"
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#define PFNAME "sv"
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/* see IEC61850-8-1 8.2 */
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#define Q_VALIDITY_GOOD (0x0U << 0)
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#define Q_VALIDITY_INVALID (0x1U << 0)
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#define Q_VALIDITY_QUESTIONABLE (0x3U << 0)
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#define Q_VALIDITY_MASK (0x3U << 0)
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#define Q_OVERFLOW (1U << 2)
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#define Q_OUTOFRANGE (1U << 3)
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#define Q_BADREFERENCE (1U << 4)
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#define Q_OSCILLATORY (1U << 5)
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#define Q_FAILURE (1U << 6)
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#define Q_OLDDATA (1U << 7)
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#define Q_INCONSISTENT (1U << 8)
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#define Q_INACCURATE (1U << 9)
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#define Q_SOURCE_PROCESS (0U << 10)
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#define Q_SOURCE_SUBSTITUTED (1U << 10)
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#define Q_SOURCE_MASK (1U << 10)
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#define Q_TEST (1U << 11)
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#define Q_OPERATORBLOCKED (1U << 12)
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/* see UCA Implementation Guideline for IEC 61850-9-2 */
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#define Q_DERIVED (1U << 13)
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void proto_register_sv(void);
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void proto_reg_handoff_sv(void);
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/* Data for SV tap */
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static int sv_tap = -1;
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static sv_frame_data sv_data;
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/* Initialize the protocol and registered fields */
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static int proto_sv = -1;
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static int hf_sv_appid = -1;
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static int hf_sv_length = -1;
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static int hf_sv_reserve1 = -1;
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static int hf_sv_reserve2 = -1;
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static int hf_sv_phmeas_instmag_i = -1;
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static int hf_sv_phsmeas_q = -1;
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static int hf_sv_phsmeas_q_validity = -1;
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static int hf_sv_phsmeas_q_overflow = -1;
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static int hf_sv_phsmeas_q_outofrange = -1;
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static int hf_sv_phsmeas_q_badreference = -1;
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static int hf_sv_phsmeas_q_oscillatory = -1;
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static int hf_sv_phsmeas_q_failure = -1;
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static int hf_sv_phsmeas_q_olddata = -1;
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static int hf_sv_phsmeas_q_inconsistent = -1;
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static int hf_sv_phsmeas_q_inaccurate = -1;
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static int hf_sv_phsmeas_q_source = -1;
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static int hf_sv_phsmeas_q_test = -1;
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static int hf_sv_phsmeas_q_operatorblocked = -1;
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static int hf_sv_phsmeas_q_derived = -1;
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#include "packet-sv-hf.c"
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/* Initialize the subtree pointers */
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static int ett_sv = -1;
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static int ett_phsmeas = -1;
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static int ett_phsmeas_q = -1;
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#include "packet-sv-ett.c"
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static expert_field ei_sv_mal_utctime = EI_INIT;
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static expert_field ei_sv_zero_pdu = EI_INIT;
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static gboolean sv_decode_data_as_phsmeas = FALSE;
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static dissector_handle_t sv_handle;
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static const value_string sv_q_validity_vals[] = {
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{ 0, "good" },
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{ 1, "invalid" },
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{ 3, "questionable" },
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{ 0, NULL }
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};
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static const value_string sv_q_source_vals[] = {
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{ 0, "process" },
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{ 1, "substituted" },
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{ 0, NULL }
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};
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static int
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dissect_PhsMeas1(gboolean implicit_tag, packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, int hf_id _U_)
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{
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gint8 ber_class;
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gboolean pc;
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gint32 tag;
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guint32 len;
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proto_tree *subtree;
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gint32 value;
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guint32 qual;
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guint32 i;
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static int * const q_flags[] = {
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&hf_sv_phsmeas_q_validity,
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&hf_sv_phsmeas_q_overflow,
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&hf_sv_phsmeas_q_outofrange,
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&hf_sv_phsmeas_q_badreference,
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&hf_sv_phsmeas_q_oscillatory,
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&hf_sv_phsmeas_q_failure,
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&hf_sv_phsmeas_q_olddata,
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&hf_sv_phsmeas_q_inconsistent,
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&hf_sv_phsmeas_q_inaccurate,
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&hf_sv_phsmeas_q_source,
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&hf_sv_phsmeas_q_test,
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&hf_sv_phsmeas_q_operatorblocked,
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&hf_sv_phsmeas_q_derived,
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NULL
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};
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if (!implicit_tag) {
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offset=dissect_ber_identifier(pinfo, tree, tvb, offset, &ber_class, &pc, &tag);
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offset=dissect_ber_length(pinfo, tree, tvb, offset, &len, NULL);
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} else {
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len=tvb_reported_length_remaining(tvb, offset);
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}
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subtree = proto_tree_add_subtree(tree, tvb, offset, len, ett_phsmeas, NULL, "PhsMeas1");
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sv_data.num_phsMeas = 0;
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for (i = 0; i < len/8; i++) {
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if (tree && subtree) {
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value = tvb_get_ntohl(tvb, offset);
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qual = tvb_get_ntohl(tvb, offset + 4);
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proto_tree_add_item(subtree, hf_sv_phmeas_instmag_i, tvb, offset, 4, ENC_BIG_ENDIAN);
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proto_tree_add_bitmask(subtree, tvb, offset + 4, hf_sv_phsmeas_q, ett_phsmeas_q, q_flags, ENC_BIG_ENDIAN);
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if (i < IEC61850_SV_MAX_PHSMEAS_ENTRIES) {
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sv_data.phsMeas[i].value = value;
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sv_data.phsMeas[i].qual = qual;
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sv_data.num_phsMeas++;
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}
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}
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offset += 8;
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}
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return offset;
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}
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#include "packet-sv-fn.c"
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/*
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* Dissect SV PDUs inside a PPDU.
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*/
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static int
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dissect_sv(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, void* data _U_)
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{
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int offset = 0;
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int old_offset;
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guint sv_length = 0;
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proto_item *item;
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proto_tree *tree;
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asn1_ctx_t asn1_ctx;
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asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
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item = proto_tree_add_item(parent_tree, proto_sv, tvb, 0, -1, ENC_NA);
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tree = proto_item_add_subtree(item, ett_sv);
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col_set_str(pinfo->cinfo, COL_PROTOCOL, PNAME);
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col_clear(pinfo->cinfo, COL_INFO);
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/* APPID */
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proto_tree_add_item(tree, hf_sv_appid, tvb, offset, 2, ENC_BIG_ENDIAN);
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/* Length */
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proto_tree_add_item_ret_uint(tree, hf_sv_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN, &sv_length);
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/* Reserved 1 */
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proto_tree_add_item(tree, hf_sv_reserve1, tvb, offset + 4, 2, ENC_BIG_ENDIAN);
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/* Reserved 2 */
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proto_tree_add_item(tree, hf_sv_reserve2, tvb, offset + 6, 2, ENC_BIG_ENDIAN);
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offset = 8;
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while ((tvb_reported_length_remaining(tvb, offset) > 0) && ((guint)offset < sv_length)) {
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old_offset = offset;
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offset = dissect_sv_SampledValues(FALSE, tvb, offset, &asn1_ctx , tree, -1);
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if (offset == old_offset) {
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proto_tree_add_expert(tree, pinfo, &ei_sv_zero_pdu, tvb, offset, -1);
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break;
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}
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}
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tap_queue_packet(sv_tap, pinfo, &sv_data);
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return tvb_captured_length(tvb);
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}
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/*--- proto_register_sv -------------------------------------------*/
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void proto_register_sv(void) {
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/* List of fields */
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static hf_register_info hf[] = {
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{ &hf_sv_appid,
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{ "APPID", "sv.appid", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
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{ &hf_sv_length,
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{ "Length", "sv.length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
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{ &hf_sv_reserve1,
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{ "Reserved 1", "sv.reserve1", FT_UINT16, BASE_HEX_DEC, NULL, 0x0, NULL, HFILL }},
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{ &hf_sv_reserve2,
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{ "Reserved 2", "sv.reserve2", FT_UINT16, BASE_HEX_DEC, NULL, 0x0, NULL, HFILL }},
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{ &hf_sv_phmeas_instmag_i,
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{ "value", "sv.meas_value", FT_INT32, BASE_DEC, NULL, 0x0, NULL, HFILL}},
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{ &hf_sv_phsmeas_q,
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{ "quality", "sv.meas_quality", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},
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{ &hf_sv_phsmeas_q_validity,
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{ "validity", "sv.meas_quality.validity", FT_UINT32, BASE_HEX, VALS(sv_q_validity_vals), Q_VALIDITY_MASK, NULL, HFILL}},
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{ &hf_sv_phsmeas_q_overflow,
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{ "overflow", "sv.meas_quality.overflow", FT_BOOLEAN, 32, NULL, Q_OVERFLOW, NULL, HFILL}},
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{ &hf_sv_phsmeas_q_outofrange,
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{ "out of range", "sv.meas_quality.outofrange", FT_BOOLEAN, 32, NULL, Q_OUTOFRANGE, NULL, HFILL}},
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{ &hf_sv_phsmeas_q_badreference,
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{ "bad reference", "sv.meas_quality.badreference", FT_BOOLEAN, 32, NULL, Q_BADREFERENCE, NULL, HFILL}},
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{ &hf_sv_phsmeas_q_oscillatory,
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{ "oscillatory", "sv.meas_quality.oscillatory", FT_BOOLEAN, 32, NULL, Q_OSCILLATORY, NULL, HFILL}},
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{ &hf_sv_phsmeas_q_failure,
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{ "failure", "sv.meas_quality.failure", FT_BOOLEAN, 32, NULL, Q_FAILURE, NULL, HFILL}},
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{ &hf_sv_phsmeas_q_olddata,
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{ "old data", "sv.meas_quality.olddata", FT_BOOLEAN, 32, NULL, Q_OLDDATA, NULL, HFILL}},
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{ &hf_sv_phsmeas_q_inconsistent,
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{ "inconsistent", "sv.meas_quality.inconsistent", FT_BOOLEAN, 32, NULL, Q_INCONSISTENT, NULL, HFILL}},
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{ &hf_sv_phsmeas_q_inaccurate,
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{ "inaccurate", "sv.meas_quality.inaccurate", FT_BOOLEAN, 32, NULL, Q_INACCURATE, NULL, HFILL}},
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{ &hf_sv_phsmeas_q_source,
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{ "source", "sv.meas_quality.source", FT_UINT32, BASE_HEX, VALS(sv_q_source_vals), Q_SOURCE_MASK, NULL, HFILL}},
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{ &hf_sv_phsmeas_q_test,
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{ "test", "sv.meas_quality.teset", FT_BOOLEAN, 32, NULL, Q_TEST, NULL, HFILL}},
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{ &hf_sv_phsmeas_q_operatorblocked,
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{ "operator blocked", "sv.meas_quality.operatorblocked", FT_BOOLEAN, 32, NULL, Q_OPERATORBLOCKED, NULL, HFILL}},
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{ &hf_sv_phsmeas_q_derived,
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{ "derived", "sv.meas_quality.derived", FT_BOOLEAN, 32, NULL, Q_DERIVED, NULL, HFILL}},
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#include "packet-sv-hfarr.c"
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};
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/* List of subtrees */
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static gint *ett[] = {
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&ett_sv,
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&ett_phsmeas,
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&ett_phsmeas_q,
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#include "packet-sv-ettarr.c"
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};
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static ei_register_info ei[] = {
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{ &ei_sv_mal_utctime, { "sv.malformed.utctime", PI_MALFORMED, PI_WARN, "BER Error: malformed UTCTime encoding", EXPFILL }},
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{ &ei_sv_zero_pdu, { "sv.zero_pdu", PI_PROTOCOL, PI_ERROR, "Internal error, zero-byte SV PDU", EXPFILL }},
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};
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expert_module_t* expert_sv;
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module_t *sv_module;
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/* Register protocol */
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proto_sv = proto_register_protocol(PNAME, PSNAME, PFNAME);
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sv_handle = register_dissector("sv", dissect_sv, proto_sv);
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/* Register fields and subtrees */
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proto_register_field_array(proto_sv, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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expert_sv = expert_register_protocol(proto_sv);
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expert_register_field_array(expert_sv, ei, array_length(ei));
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sv_module = prefs_register_protocol(proto_sv, NULL);
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prefs_register_bool_preference(sv_module, "decode_data_as_phsmeas",
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"Force decoding of seqData as PhsMeas",
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NULL, &sv_decode_data_as_phsmeas);
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/* Register tap */
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sv_tap = register_tap("sv");
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}
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/*--- proto_reg_handoff_sv --- */
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void proto_reg_handoff_sv(void) {
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dissector_add_uint("ethertype", ETHERTYPE_IEC61850_SV, sv_handle);
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}
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