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wireshark/plugins/opcua/opcua_simpletypes.c

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/******************************************************************************
** $Id$
**
** Copyright (C) 2006-2007 ascolab GmbH. All Rights Reserved.
** Web: http://www.ascolab.com
**
** 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 file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** Project: OpcUa Wireshark Plugin
**
** Description: Implementation of OpcUa built-in type parsers.
** This contains all the simple types and some complex types.
**
** Author: Gerhard Gappmeier <gerhard.gappmeier@ascolab.com>
** Last change by: $Author: gergap $
**
******************************************************************************/
#include "config.h"
#include <glib.h>
#include <epan/packet.h>
#include <epan/dissectors/packet-windows-common.h>
#include "opcua_simpletypes.h"
#include "opcua_hfindeces.h"
#include "opcua_extensionobjectids.h"
#include <epan/emem.h>
#define DIAGNOSTICINFO_ENCODINGMASK_SYMBOLICID_FLAG 0x01
#define DIAGNOSTICINFO_ENCODINGMASK_NAMESPACE_FLAG 0x02
#define DIAGNOSTICINFO_ENCODINGMASK_LOCALIZEDTEXT_FLAG 0x04
#define DIAGNOSTICINFO_ENCODINGMASK_ADDITIONALINFO_FLAG 0x08
#define DIAGNOSTICINFO_ENCODINGMASK_INNERSTATUSCODE_FLAG 0x10
#define DIAGNOSTICINFO_ENCODINGMASK_INNERDIAGNOSTICINFO_FLAG 0x20
#define LOCALIZEDTEXT_ENCODINGBYTE_LOCALE 0x01
#define LOCALIZEDTEXT_ENCODINGBYTE_TEXT 0x02
#define NODEID_URIMASK 0x80
#define NODEID_SERVERINDEXFLAG 0x40
#define DATAVALUE_ENCODINGBYTE_VALUE 0x01
#define DATAVALUE_ENCODINGBYTE_STATUSCODE 0x02
#define DATAVALUE_ENCODINGBYTE_SOURCETIMESTAMP 0x04
#define DATAVALUE_ENCODINGBYTE_SERVERTIMESTAMP 0x08
#define DATAVALUE_ENCODINGBYTE_SOURCEPICOSECONDS 0x10
#define DATAVALUE_ENCODINGBYTE_SERVERPICOSECONDS 0x20
#define EXTOBJ_ENCODINGMASK_BINBODY_FLAG 0x01
#define EXTOBJ_ENCODINGMASK_XMLBODY_FLAG 0x02
/* Chosen arbitrarily */
#define MAX_ARRAY_LEN 10000
void dispatchExtensionObjectType(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int TypeId);
static int hf_opcua_diag_mask_symbolicflag = -1;
static int hf_opcua_diag_mask_namespaceflag = -1;
static int hf_opcua_diag_mask_localizedtextflag = -1;
static int hf_opcua_diag_mask_additionalinfoflag = -1;
static int hf_opcua_diag_mask_innerstatuscodeflag = -1;
static int hf_opcua_diag_mask_innerdiaginfoflag = -1;
static int hf_opcua_loctext_mask_localeflag = -1;
static int hf_opcua_loctext_mask_textflag = -1;
static int hf_opcua_datavalue_mask_valueflag = -1;
static int hf_opcua_datavalue_mask_statuscodeflag = -1;
static int hf_opcua_datavalue_mask_sourcetimestampflag = -1;
static int hf_opcua_datavalue_mask_servertimestampflag = -1;
static int hf_opcua_datavalue_mask_sourcepicoseconds = -1;
static int hf_opcua_datavalue_mask_serverpicoseconds = -1;
static int hf_opcua_nodeid_encodingmask = -1;
static int hf_opcua_variant_encodingmask = -1;
static int hf_opcua_nodeid_nsid = -1;
static int hf_opcua_nodeid_numeric = -1;
static int hf_opcua_localizedtext_locale = -1;
static int hf_opcua_localizedtext_text = -1;
static int hf_opcua_qualifiedname_id = -1;
static int hf_opcua_qualifiedname_name = -1;
static int hf_opcua_SourceTimestamp = -1;
static int hf_opcua_SourcePicoseconds = -1;
static int hf_opcua_ServerTimestamp = -1;
static int hf_opcua_ServerPicoseconds = -1;
static int hf_opcua_diag_symbolicid = -1;
static int hf_opcua_diag_namespace = -1;
static int hf_opcua_diag_localizedtext = -1;
static int hf_opcua_diag_additionalinfo = -1;
static int hf_opcua_diag_innerstatuscode = -1;
static int hf_opcua_extobj_mask_binbodyflag = -1;
static int hf_opcua_extobj_mask_xmlbodyflag = -1;
static int hf_opcua_ArraySize = -1;
static int hf_opcua_Uri = -1;
static int hf_opcua_ServerIndex = -1;
/** NodeId encoding mask table */
static const value_string g_nodeidmasks[] = {
{ 0, "Two byte encoded Numeric" },
{ 1, "Four byte encoded Numeric" },
{ 2, "Numeric of arbitrary length" },
{ 3, "String" },
{ 4, "URI" },
{ 5, "GUID" },
{ 6, "ByteString" },
{ 0x80, "UriMask" },
{ 0, NULL }
};
/** UA Variant Type enum */
typedef enum _OpcUa_BuiltInType
{
OpcUaType_Null = 0,
OpcUaType_Boolean = 1,
OpcUaType_SByte = 2,
OpcUaType_Byte = 3,
OpcUaType_Int16 = 4,
OpcUaType_UInt16 = 5,
OpcUaType_Int32 = 6,
OpcUaType_UInt32 = 7,
OpcUaType_Int64 = 8,
OpcUaType_UInt64 = 9,
OpcUaType_Float = 10,
OpcUaType_Double = 11,
OpcUaType_String = 12,
OpcUaType_DateTime = 13,
OpcUaType_Guid = 14,
OpcUaType_ByteString = 15,
OpcUaType_XmlElement = 16,
OpcUaType_NodeId = 17,
OpcUaType_ExpandedNodeId = 18,
OpcUaType_StatusCode = 19,
OpcUaType_QualifiedName = 20,
OpcUaType_LocalizedText = 21,
OpcUaType_ExtensionObject = 22,
OpcUaType_DataValue = 23,
OpcUaType_Variant = 24,
OpcUaType_DiagnosticInfo = 25
}
OpcUa_BuiltInType;
/** Variant encoding mask table */
static const value_string g_VariantTypes[] = {
{ 0, "Null" },
{ 1, "Boolean" },
{ 2, "SByte" },
{ 3, "Byte" },
{ 4, "Int16" },
{ 5, "UInt16" },
{ 6, "Int32" },
{ 7, "UInt32" },
{ 8, "Int64" },
{ 9, "UInt64" },
{ 10, "Float" },
{ 11, "Double" },
{ 12, "String" },
{ 13, "DateTime" },
{ 14, "Guid" },
{ 15, "ByteString" },
{ 16, "XmlElement" },
{ 17, "NodeId" },
{ 18, "ExpandedNodeId" },
{ 19, "StatusCode" },
{ 20, "QualifiedName" },
{ 21, "LocalizedText" },
{ 22, "ExtensionObject" },
{ 23, "DataValue" },
{ 24, "Variant" },
{ 25, "DiagnosticInfo" },
{ 0x80, "Array of Null" },
{ 0x80+1, "Array of Boolean" },
{ 0x80+2, "Array of SByte" },
{ 0x80+3, "Array of Byte" },
{ 0x80+4, "Array of Int16" },
{ 0x80+5, "Array of UInt16" },
{ 0x80+6, "Array of Int32" },
{ 0x80+7, "Array of UInt32" },
{ 0x80+8, "Array of Int64" },
{ 0x80+9, "Array of UInt64" },
{ 0x80+10, "Array of Float" },
{ 0x80+11, "Array of Double" },
{ 0x80+12, "Array of String" },
{ 0x80+13, "Array of DateTime" },
{ 0x80+14, "Array of Guid" },
{ 0x80+15, "Array of ByteString" },
{ 0x80+16, "Array of XmlElement" },
{ 0x80+17, "Array of NodeId" },
{ 0x80+18, "Array of ExpandedNodeId" },
{ 0x80+19, "Array of StatusCode" },
{ 0x80+20, "Array of QualifiedName" },
{ 0x80+21, "Array of LocalizedText" },
{ 0x80+22, "Array of ExtensionObject" },
{ 0x80+23, "Array of DataValue" },
{ 0x80+24, "Array of Variant" },
{ 0x80+25, "Array of DiagnosticInfo" },
{ 0, NULL }
};
#define VARIANT_ARRAYDIMENSIONS 0x40
#define VARIANT_ARRAYMASK 0x80
/* trees */
static gint ett_opcua_array = -1;
static gint ett_opcua_diagnosticinfo = -1;
static gint ett_opcua_nodeid = -1;
static gint ett_opcua_localeid = -1;
static gint ett_opcua_localizedtext = -1;
static gint ett_opcua_qualifiedname = -1;
static gint ett_opcua_datavalue = -1;
static gint ett_opcua_variant = -1;
static gint ett_opcua_extensionobject = -1;
static gint ett_opcua_extobj_encodingmask = -1;
static gint *ett[] =
{
&ett_opcua_array,
&ett_opcua_diagnosticinfo,
&ett_opcua_nodeid,
&ett_opcua_localeid,
&ett_opcua_localizedtext,
&ett_opcua_qualifiedname,
&ett_opcua_datavalue,
&ett_opcua_variant,
&ett_opcua_extensionobject,
&ett_opcua_extobj_encodingmask
};
void registerSimpleTypes(int proto)
{
static hf_register_info hf[] =
{
/* full name , abbreviation , type , display , strings, bitmask, blurb, id, parent, ref_count, bitshift */
{ &hf_opcua_diag_mask_symbolicflag,
{ "has symbolic id", "opcua.has_symbolic_id", FT_BOOLEAN, 8, NULL, DIAGNOSTICINFO_ENCODINGMASK_SYMBOLICID_FLAG, NULL, HFILL }
},
{ &hf_opcua_diag_mask_namespaceflag,
{ "has namespace", "opcua.has_namespace", FT_BOOLEAN, 8, NULL, DIAGNOSTICINFO_ENCODINGMASK_NAMESPACE_FLAG, NULL, HFILL }
},
{ &hf_opcua_diag_mask_localizedtextflag,
{ "has localizedtext", "opcua.has_localizedtext", FT_BOOLEAN, 8, NULL, DIAGNOSTICINFO_ENCODINGMASK_LOCALIZEDTEXT_FLAG, NULL, HFILL }
},
{ &hf_opcua_diag_mask_additionalinfoflag,
{ "has additional info", "opcua.has_additional_info", FT_BOOLEAN, 8, NULL, DIAGNOSTICINFO_ENCODINGMASK_ADDITIONALINFO_FLAG, NULL, HFILL }
},
{ &hf_opcua_diag_mask_innerstatuscodeflag,
{ "has inner statuscode", "opcua.has_inner_statuscode", FT_BOOLEAN, 8, NULL, DIAGNOSTICINFO_ENCODINGMASK_INNERSTATUSCODE_FLAG, NULL, HFILL }
},
{ &hf_opcua_diag_mask_innerdiaginfoflag,
{ "has inner diagnostic info", "opcua.has_inner_diagnostic_code", FT_BOOLEAN, 8, NULL, DIAGNOSTICINFO_ENCODINGMASK_INNERDIAGNOSTICINFO_FLAG, NULL, HFILL }
},
{ &hf_opcua_loctext_mask_localeflag,
{ "has locale information", "opcua.has_locale_information", FT_BOOLEAN, 8, NULL, LOCALIZEDTEXT_ENCODINGBYTE_LOCALE, NULL, HFILL }
},
{ &hf_opcua_loctext_mask_textflag,
{ "has text", "opcua.has_text", FT_BOOLEAN, 8, NULL, LOCALIZEDTEXT_ENCODINGBYTE_TEXT, NULL, HFILL }
},
{ &hf_opcua_nodeid_encodingmask,
{ "NodeId EncodingMask", "application.nodeid.encodingmask", FT_UINT8, BASE_HEX, VALS(g_nodeidmasks), 0x0, NULL, HFILL }
},
{ &hf_opcua_nodeid_nsid,
{ "NodeId Namespace Id", "application.nodeid.nsid", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_opcua_nodeid_numeric,
{ "NodeId Identifier Numeric", "application.nodeid.numeric", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_opcua_localizedtext_locale, { "Locale", "opcua.Locale", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_opcua_localizedtext_text, { "Text", "opcua.Text", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_opcua_qualifiedname_id, { "Id", "opcua.Id", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_opcua_qualifiedname_name, { "Name", "opcua.Name", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_opcua_datavalue_mask_valueflag, { "has value", "opcua.has_value", FT_BOOLEAN, 8, NULL, DATAVALUE_ENCODINGBYTE_VALUE, NULL, HFILL } },
{ &hf_opcua_datavalue_mask_statuscodeflag, { "has statuscode", "opcua.has_statuscode", FT_BOOLEAN, 8, NULL, DATAVALUE_ENCODINGBYTE_STATUSCODE, NULL, HFILL } },
{ &hf_opcua_datavalue_mask_sourcetimestampflag, { "has source timestamp", "opcua.has_source_timestamp", FT_BOOLEAN, 8, NULL, DATAVALUE_ENCODINGBYTE_SOURCETIMESTAMP, NULL, HFILL } },
{ &hf_opcua_datavalue_mask_servertimestampflag, { "has server timestamp", "opcua.has_server_timestamp", FT_BOOLEAN, 8, NULL, DATAVALUE_ENCODINGBYTE_SERVERTIMESTAMP, NULL, HFILL } },
{ &hf_opcua_datavalue_mask_sourcepicoseconds, { "has source picoseconds", "opcua.has_source_picoseconds", FT_BOOLEAN, 8, NULL, DATAVALUE_ENCODINGBYTE_SOURCEPICOSECONDS, NULL, HFILL } },
{ &hf_opcua_datavalue_mask_serverpicoseconds, { "has server picoseconds", "opcua.has_server_picoseconds", FT_BOOLEAN, 8, NULL, DATAVALUE_ENCODINGBYTE_SERVERPICOSECONDS, NULL, HFILL } },
{ &hf_opcua_variant_encodingmask, { "Variant Type", "opcua.has_value", FT_UINT8, BASE_HEX, VALS(g_VariantTypes), 0x0, NULL, HFILL } },
{ &hf_opcua_SourceTimestamp, { "SourceTimestamp", "opcua.SourceTimestamp", FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL, NULL, 0x0, NULL, HFILL } },
{ &hf_opcua_SourcePicoseconds, { "SourcePicoseconds", "opcua.SourcePicoseconds", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_opcua_ServerTimestamp, { "ServerTimestamp", "opcua.ServerTimestamp", FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL, NULL, 0x0, NULL, HFILL } },
{ &hf_opcua_ServerPicoseconds, { "ServerPicoseconds", "opcua.ServerPicoseconds", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_opcua_diag_symbolicid, { "SymbolicId", "opcua.SymbolicId", FT_INT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_opcua_diag_namespace, { "Namespace", "opcua.Namespace", FT_INT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_opcua_diag_localizedtext, { "LocaliezdText", "opcua.LocaliezdText", FT_INT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_opcua_diag_additionalinfo, { "AdditionalInfo", "opcua.AdditionalInfo", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_opcua_diag_innerstatuscode, { "InnerStatusCode", "opcua.InnerStatusCode", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
{ &hf_opcua_extobj_mask_binbodyflag, { "has binary body", "opcua.has_binary_body", FT_BOOLEAN, 8, NULL, EXTOBJ_ENCODINGMASK_BINBODY_FLAG, NULL, HFILL } },
{ &hf_opcua_extobj_mask_xmlbodyflag, { "has xml body", "opcua.has_xml_body", FT_BOOLEAN, 8, NULL, EXTOBJ_ENCODINGMASK_XMLBODY_FLAG, NULL, HFILL } },
{ &hf_opcua_ArraySize, { "ArraySize", "opcua.ArraySize", FT_INT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_opcua_Uri, { "Uri", "opcua.Uri", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_opcua_ServerIndex, { "ServerIndex", "opcua.ServerIndex", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }
};
proto_register_field_array(proto, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void parseBoolean(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex)
{
proto_tree_add_item(tree, hfIndex, tvb, *pOffset, 1, ENC_LITTLE_ENDIAN); *pOffset+=1;
}
void parseByte(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex)
{
proto_tree_add_item(tree, hfIndex, tvb, *pOffset, 1, ENC_LITTLE_ENDIAN); *pOffset+=1;
}
void parseSByte(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex)
{
proto_tree_add_item(tree, hfIndex, tvb, *pOffset, 1, ENC_LITTLE_ENDIAN); *pOffset+=1;
}
void parseUInt16(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex)
{
proto_tree_add_item(tree, hfIndex, tvb, *pOffset, 2, ENC_LITTLE_ENDIAN); *pOffset+=2;
}
void parseInt16(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex)
{
proto_tree_add_item(tree, hfIndex, tvb, *pOffset, 2, ENC_LITTLE_ENDIAN); *pOffset+=2;
}
void parseUInt32(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex)
{
proto_tree_add_item(tree, hfIndex, tvb, *pOffset, 4, ENC_LITTLE_ENDIAN); *pOffset+=4;
}
void parseInt32(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex)
{
proto_tree_add_item(tree, hfIndex, tvb, *pOffset, 4, ENC_LITTLE_ENDIAN); *pOffset+=4;
}
void parseUInt64(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex)
{
proto_tree_add_item(tree, hfIndex, tvb, *pOffset, 8, ENC_LITTLE_ENDIAN); *pOffset+=8;
}
void parseInt64(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex)
{
proto_tree_add_item(tree, hfIndex, tvb, *pOffset, 8, ENC_LITTLE_ENDIAN); *pOffset+=8;
}
void parseString(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex)
{
char *szValue;
gint iOffset = *pOffset;
gint32 iLen = tvb_get_letohl(tvb, *pOffset);
iOffset+=4;
if (iLen == -1)
{
proto_item *item = proto_tree_add_item(tree, hfIndex, tvb, iOffset, 0, ENC_ASCII|ENC_NA);
proto_item_append_text(item, "[OpcUa Null String]");
}
else if (iLen == 0)
{
proto_item *item = proto_tree_add_item(tree, hfIndex, tvb, iOffset, 0, ENC_ASCII|ENC_NA);
proto_item_append_text(item, "[OpcUa Empty String]");
}
else if (iLen > 0)
{
proto_tree_add_item(tree, hfIndex, tvb, iOffset, iLen, ENC_ASCII|ENC_NA);
iOffset += iLen; /* eat the whole string */
}
else
{
proto_item *item = proto_tree_add_item(tree, hfIndex, tvb, iOffset, 0, ENC_ASCII|ENC_NA);
szValue = ep_strdup_printf("[Invalid String] Invalid length: %d", iLen);
proto_item_append_text(item, "%s", szValue);
}
*pOffset = iOffset;
}
void parseStatusCode(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex)
{
proto_tree_add_item(tree, hfIndex, tvb, *pOffset, 4, ENC_LITTLE_ENDIAN);
*pOffset += 4;
}
void parseLocalizedText(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, const char *szFieldName)
{
gint iOffset = *pOffset;
guint8 EncodingMask;
proto_tree *mask_tree;
proto_tree *subtree;
proto_item *ti;
ti = proto_tree_add_text(tree, tvb, 0, -1, "%s: LocalizedText", szFieldName);
subtree = proto_item_add_subtree(ti, ett_opcua_localizedtext);
/* parse encoding mask */
EncodingMask = tvb_get_guint8(tvb, iOffset);
ti = proto_tree_add_text(subtree, tvb, 0, -1, "EncodingMask");
mask_tree = proto_item_add_subtree(ti, ett_opcua_localizedtext);
proto_tree_add_item(mask_tree, hf_opcua_loctext_mask_localeflag, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(mask_tree, hf_opcua_loctext_mask_textflag, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
iOffset++;
if (EncodingMask & LOCALIZEDTEXT_ENCODINGBYTE_LOCALE)
{
parseString(subtree, tvb, &iOffset, hf_opcua_localizedtext_locale);
}
if (EncodingMask & LOCALIZEDTEXT_ENCODINGBYTE_TEXT)
{
parseString(subtree, tvb, &iOffset, hf_opcua_localizedtext_text);
}
*pOffset = iOffset;
}
void parseGuid(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex)
{
proto_tree_add_item(tree, hfIndex, tvb, *pOffset, GUID_LEN, ENC_NA); *pOffset+=GUID_LEN;
}
void parseByteString(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex)
{
char *szValue;
int iOffset = *pOffset;
gint32 iLen = tvb_get_letohl(tvb, iOffset);
iOffset += 4;
if (iLen == -1)
{
proto_item *item = proto_tree_add_item(tree, hfIndex, tvb, iOffset, 0, ENC_NA);
proto_item_append_text(item, "[OpcUa Null ByteString]");
}
else if (iLen == 0)
{
proto_item *item = proto_tree_add_item(tree, hfIndex, tvb, iOffset, 0, ENC_NA);
proto_item_append_text(item, "[OpcUa Empty ByteString]");
}
else if (iLen > 0)
{
proto_tree_add_item(tree, hfIndex, tvb, iOffset, iLen, ENC_NA);
iOffset += iLen; /* eat the whole bytestring */
}
else
{
proto_item *item = proto_tree_add_item(tree, hfIndex, tvb, iOffset, 0, ENC_NA);
szValue = ep_strdup_printf("[Invalid ByteString] Invalid length: %d", iLen);
proto_item_append_text(item, "%s", szValue);
}
*pOffset = iOffset;
}
void parseXmlElement(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex)
{
parseByteString(tree, tvb, pOffset, hfIndex);
}
void parseFloat(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex)
{
proto_tree_add_item(tree, hfIndex, tvb, *pOffset, sizeof(gfloat), ENC_LITTLE_ENDIAN);
*pOffset += sizeof(gfloat);
}
void parseDouble(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex)
{
proto_tree_add_item(tree, hfIndex, tvb, *pOffset, sizeof(gdouble), ENC_LITTLE_ENDIAN);
*pOffset += sizeof(gdouble);
}
void parseDateTime(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex)
{
*pOffset = dissect_nt_64bit_time(tvb, tree, *pOffset, hfIndex);
}
void parseDiagnosticInfo(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, const char *szFieldName)
{
gint iOffset = *pOffset;
guint8 EncodingMask;
proto_tree *mask_tree;
proto_tree *subtree;
proto_item *ti;
ti = proto_tree_add_text(tree, tvb, 0, -1, "%s: DiagnosticInfo", szFieldName);
subtree = proto_item_add_subtree(ti, ett_opcua_diagnosticinfo);
/* parse encoding mask */
EncodingMask = tvb_get_guint8(tvb, iOffset);
ti = proto_tree_add_text(subtree, tvb, 0, -1, "EncodingMask");
mask_tree = proto_item_add_subtree(ti, ett_opcua_diagnosticinfo);
proto_tree_add_item(mask_tree, hf_opcua_diag_mask_symbolicflag, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(mask_tree, hf_opcua_diag_mask_namespaceflag, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(mask_tree, hf_opcua_diag_mask_localizedtextflag, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(mask_tree, hf_opcua_diag_mask_additionalinfoflag, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(mask_tree, hf_opcua_diag_mask_innerstatuscodeflag, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(mask_tree, hf_opcua_diag_mask_innerdiaginfoflag, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
iOffset++;
if (EncodingMask & DIAGNOSTICINFO_ENCODINGMASK_SYMBOLICID_FLAG)
{
parseInt32(subtree, tvb, &iOffset, hf_opcua_diag_symbolicid);
}
if (EncodingMask & DIAGNOSTICINFO_ENCODINGMASK_NAMESPACE_FLAG)
{
parseInt32(subtree, tvb, &iOffset, hf_opcua_diag_namespace);
}
if (EncodingMask & DIAGNOSTICINFO_ENCODINGMASK_LOCALIZEDTEXT_FLAG)
{
parseInt32(subtree, tvb, &iOffset, hf_opcua_diag_localizedtext);
}
if (EncodingMask & DIAGNOSTICINFO_ENCODINGMASK_ADDITIONALINFO_FLAG)
{
parseString(subtree, tvb, &iOffset, hf_opcua_diag_additionalinfo);
}
if (EncodingMask & DIAGNOSTICINFO_ENCODINGMASK_INNERSTATUSCODE_FLAG)
{
parseStatusCode(subtree, tvb, &iOffset, hf_opcua_diag_innerstatuscode);
}
if (EncodingMask & DIAGNOSTICINFO_ENCODINGMASK_INNERDIAGNOSTICINFO_FLAG)
{
parseDiagnosticInfo(subtree, tvb, &iOffset, "Inner DiagnosticInfo");
}
*pOffset = iOffset;
}
void parseQualifiedName(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, const char *szFieldName)
{
proto_item *ti = proto_tree_add_text(tree, tvb, 0, -1, "%s: QualifiedName", szFieldName);
proto_tree *subtree = proto_item_add_subtree(ti, ett_opcua_qualifiedname);
parseUInt16(subtree, tvb, pOffset, hf_opcua_qualifiedname_id);
parseString(subtree, tvb, pOffset, hf_opcua_qualifiedname_name);
}
void parseDataValue(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, const char *szFieldName)
{
proto_item *ti = proto_tree_add_text(tree, tvb, 0, -1, "%s: DataValue", szFieldName);
proto_tree *subtree = proto_item_add_subtree(ti, ett_opcua_datavalue);
proto_tree *mask_tree;
gint iOffset = *pOffset;
guint8 EncodingMask;
EncodingMask = tvb_get_guint8(tvb, iOffset);
ti = proto_tree_add_text(subtree, tvb, 0, -1, "EncodingMask");
mask_tree = proto_item_add_subtree(ti, ett_opcua_datavalue);
proto_tree_add_item(mask_tree, hf_opcua_datavalue_mask_valueflag, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(mask_tree, hf_opcua_datavalue_mask_statuscodeflag, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(mask_tree, hf_opcua_datavalue_mask_sourcetimestampflag, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(mask_tree, hf_opcua_datavalue_mask_servertimestampflag, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(mask_tree, hf_opcua_datavalue_mask_sourcepicoseconds, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(mask_tree, hf_opcua_datavalue_mask_serverpicoseconds, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
iOffset++;
if (EncodingMask & DATAVALUE_ENCODINGBYTE_VALUE)
{
parseVariant(subtree, tvb, &iOffset, "Value");
}
if (EncodingMask & DATAVALUE_ENCODINGBYTE_STATUSCODE)
{
parseStatusCode(subtree, tvb, &iOffset, hf_opcua_StatusCode);
}
if (EncodingMask & DATAVALUE_ENCODINGBYTE_SOURCETIMESTAMP)
{
parseDateTime(subtree, tvb, &iOffset, hf_opcua_SourceTimestamp);
}
if (EncodingMask & DATAVALUE_ENCODINGBYTE_SOURCEPICOSECONDS)
{
parseUInt16(subtree, tvb, &iOffset, hf_opcua_SourcePicoseconds);
}
if (EncodingMask & DATAVALUE_ENCODINGBYTE_SERVERTIMESTAMP)
{
parseDateTime(subtree, tvb, &iOffset, hf_opcua_ServerTimestamp);
}
if (EncodingMask & DATAVALUE_ENCODINGBYTE_SERVERPICOSECONDS)
{
parseUInt16(subtree, tvb, &iOffset, hf_opcua_ServerPicoseconds);
}
*pOffset = iOffset;
}
void parseVariant(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, const char *szFieldName)
{
proto_item *ti = proto_tree_add_text(tree, tvb, 0, -1, "%s: Variant", szFieldName);
proto_tree *subtree = proto_item_add_subtree(ti, ett_opcua_variant);
gint iOffset = *pOffset;
guint8 EncodingMask;
gint32 ArrayLength = 0;
EncodingMask = tvb_get_guint8(tvb, iOffset);
proto_tree_add_item(subtree, hf_opcua_variant_encodingmask, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
iOffset++;
if (EncodingMask & VARIANT_ARRAYMASK)
{
ArrayLength = tvb_get_letohl(tvb, iOffset);
/* type is encoded in bits 0-5 */
switch(EncodingMask & 0x3f)
{
case OpcUaType_Null: break;
case OpcUaType_Boolean: parseArraySimple(subtree, tvb, &iOffset, hf_opcua_Boolean, parseBoolean); break;
case OpcUaType_SByte: parseArraySimple(subtree, tvb, &iOffset, hf_opcua_SByte, parseSByte); break;
case OpcUaType_Byte: parseArraySimple(subtree, tvb, &iOffset, hf_opcua_Byte, parseByte); break;
case OpcUaType_Int16: parseArraySimple(subtree, tvb, &iOffset, hf_opcua_Int16, parseInt16); break;
case OpcUaType_UInt16: parseArraySimple(subtree, tvb, &iOffset, hf_opcua_UInt16, parseUInt16); break;
case OpcUaType_Int32: parseArraySimple(subtree, tvb, &iOffset, hf_opcua_Int32, parseInt32); break;
case OpcUaType_UInt32: parseArraySimple(subtree, tvb, &iOffset, hf_opcua_UInt32, parseUInt32); break;
case OpcUaType_Int64: parseArraySimple(subtree, tvb, &iOffset, hf_opcua_Int64, parseInt64); break;
case OpcUaType_UInt64: parseArraySimple(subtree, tvb, &iOffset, hf_opcua_UInt64, parseUInt64); break;
case OpcUaType_Float: parseArraySimple(subtree, tvb, &iOffset, hf_opcua_Float, parseFloat); break;
case OpcUaType_Double: parseArraySimple(subtree, tvb, &iOffset, hf_opcua_Double, parseDouble); break;
case OpcUaType_String: parseArraySimple(subtree, tvb, &iOffset, hf_opcua_String, parseString); break;
case OpcUaType_DateTime: parseArraySimple(subtree, tvb, &iOffset, hf_opcua_DateTime, parseDateTime); break;
case OpcUaType_Guid: parseArraySimple(subtree, tvb, &iOffset, hf_opcua_Guid, parseGuid); break;
case OpcUaType_ByteString: parseArraySimple(subtree, tvb, &iOffset, hf_opcua_ByteString, parseByteString); break;
case OpcUaType_XmlElement: parseArraySimple(subtree, tvb, &iOffset, hf_opcua_XmlElement, parseXmlElement); break;
case OpcUaType_NodeId: parseArrayComplex(subtree, tvb, &iOffset, "NodeId", parseNodeId); break;
case OpcUaType_ExpandedNodeId: parseArrayComplex(subtree, tvb, &iOffset, "ExpandedNodeId", parseExpandedNodeId); break;
case OpcUaType_StatusCode: parseArraySimple(subtree, tvb, &iOffset, hf_opcua_StatusCode, parseStatusCode); break;
case OpcUaType_DiagnosticInfo: parseArrayComplex(subtree, tvb, &iOffset, "DiagnosticInfo", parseDiagnosticInfo); break;
case OpcUaType_QualifiedName: parseArrayComplex(subtree, tvb, &iOffset, "QualifiedName", parseQualifiedName); break;
case OpcUaType_LocalizedText: parseArrayComplex(subtree, tvb, &iOffset, "LocalizedText", parseLocalizedText); break;
case OpcUaType_ExtensionObject: parseArrayComplex(subtree, tvb, &iOffset, "ExtensionObject", parseExtensionObject); break;
case OpcUaType_DataValue: parseArrayComplex(subtree, tvb, &iOffset, "DataValue", parseDataValue); break;
case OpcUaType_Variant: parseArrayComplex(subtree, tvb, &iOffset, "Variant", parseVariant); break;
}
if (EncodingMask & VARIANT_ARRAYDIMENSIONS)
{
proto_item *ti_2 = proto_tree_add_text(tree, tvb, 0, -1, "Array Dimensions");
proto_tree *subtree_2 = proto_item_add_subtree(ti_2, ett_opcua_array);
int i;
if (ArrayLength < MAX_ARRAY_LEN)
{
for (i=0; i<ArrayLength; i++)
{
parseInt32(subtree_2, tvb, pOffset, hf_opcua_Int32);
}
}
else
{
proto_item *pi;
/* XXX - This should be expert_add_info_format, but we need pinfo for that */
pi = proto_tree_add_text(tree, tvb, iOffset, 4, "Array length %d too large to process", ArrayLength);
PROTO_ITEM_SET_GENERATED(pi);
}
}
}
else
{
/* type is encoded in bits 0-5 */
switch(EncodingMask & 0x3f)
{
case OpcUaType_Null: break;
case OpcUaType_Boolean: parseBoolean(subtree, tvb, &iOffset, hf_opcua_Boolean); break;
case OpcUaType_SByte: parseSByte(subtree, tvb, &iOffset, hf_opcua_SByte); break;
case OpcUaType_Byte: parseByte(subtree, tvb, &iOffset, hf_opcua_Byte); break;
case OpcUaType_Int16: parseInt16(subtree, tvb, &iOffset, hf_opcua_Int16); break;
case OpcUaType_UInt16: parseUInt16(subtree, tvb, &iOffset, hf_opcua_UInt16); break;
case OpcUaType_Int32: parseInt32(subtree, tvb, &iOffset, hf_opcua_Int32); break;
case OpcUaType_UInt32: parseUInt32(subtree, tvb, &iOffset, hf_opcua_UInt32); break;
case OpcUaType_Int64: parseInt64(subtree, tvb, &iOffset, hf_opcua_Int64); break;
case OpcUaType_UInt64: parseUInt64(subtree, tvb, &iOffset, hf_opcua_UInt64); break;
case OpcUaType_Float: parseFloat(subtree, tvb, &iOffset, hf_opcua_Float); break;
case OpcUaType_Double: parseDouble(subtree, tvb, &iOffset, hf_opcua_Double); break;
case OpcUaType_String: parseString(subtree, tvb, &iOffset, hf_opcua_String); break;
case OpcUaType_DateTime: parseDateTime(subtree, tvb, &iOffset, hf_opcua_DateTime); break;
case OpcUaType_Guid: parseGuid(subtree, tvb, &iOffset, hf_opcua_Guid); break;
case OpcUaType_ByteString: parseByteString(subtree, tvb, &iOffset, hf_opcua_ByteString); break;
case OpcUaType_XmlElement: parseXmlElement(subtree, tvb, &iOffset, hf_opcua_XmlElement); break;
case OpcUaType_NodeId: parseNodeId(subtree, tvb, &iOffset, "Value"); break;
case OpcUaType_ExpandedNodeId: parseExpandedNodeId(subtree, tvb, &iOffset, "Value"); break;
case OpcUaType_StatusCode: parseStatusCode(subtree, tvb, &iOffset, hf_opcua_StatusCode); break;
case OpcUaType_DiagnosticInfo: parseDiagnosticInfo(subtree, tvb, &iOffset, "Value"); break;
case OpcUaType_QualifiedName: parseQualifiedName(subtree, tvb, &iOffset, "Value"); break;
case OpcUaType_LocalizedText: parseLocalizedText(subtree, tvb, &iOffset, "Value"); break;
case OpcUaType_ExtensionObject: parseExtensionObject(subtree, tvb, &iOffset, "Value"); break;
case OpcUaType_DataValue: parseDataValue(subtree, tvb, &iOffset, "Value"); break;
case OpcUaType_Variant: parseVariant(subtree, tvb, &iOffset, "Value"); break;
}
}
*pOffset = iOffset;
}
/** General parsing function for arrays of simple types.
* All arrays have one 4 byte signed integer length information,
* followed by n data elements.
*/
void parseArraySimple(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int hfIndex, fctSimpleTypeParser pParserFunction)
{
static const char szFieldName[] = "Array of Simple Type";
proto_item *ti = proto_tree_add_text(tree, tvb, 0, -1, "%s", szFieldName);
proto_tree *subtree = proto_item_add_subtree(ti, ett_opcua_array);
int i;
gint32 iLen;
/* read array length */
iLen = tvb_get_letohl(tvb, *pOffset);
proto_tree_add_item(subtree, hf_opcua_ArraySize, tvb, *pOffset, 4, ENC_LITTLE_ENDIAN);
if (iLen > MAX_ARRAY_LEN)
{
proto_item *pi;
pi = proto_tree_add_text(tree, tvb, *pOffset, 4, "Array length %d too large to process", iLen);
PROTO_ITEM_SET_GENERATED(pi);
return;
}
*pOffset += 4;
for (i=0; i<iLen; i++)
{
(*pParserFunction)(subtree, tvb, pOffset, hfIndex);
}
}
/** General parsing function for arrays of enums.
* All arrays have one 4 byte signed integer length information,
* followed by n data elements.
*/
void parseArrayEnum(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, fctEnumParser pParserFunction)
{
static const char szFieldName[] = "Array of Enum Type";
proto_item *ti = proto_tree_add_text(tree, tvb, 0, -1, "%s", szFieldName);
proto_tree *subtree = proto_item_add_subtree(ti, ett_opcua_array);
int i;
gint32 iLen;
/* read array length */
iLen = tvb_get_letohl(tvb, *pOffset);
proto_tree_add_item(subtree, hf_opcua_ArraySize, tvb, *pOffset, 4, ENC_LITTLE_ENDIAN);
if (iLen > MAX_ARRAY_LEN)
{
proto_item *pi;
pi = proto_tree_add_text(tree, tvb, *pOffset, 4, "Array length %d too large to process", iLen);
PROTO_ITEM_SET_GENERATED(pi);
return;
}
*pOffset += 4;
for (i=0; i<iLen; i++)
{
(*pParserFunction)(subtree, tvb, pOffset);
}
}
/** General parsing function for arrays of complex types.
* All arrays have one 4 byte signed integer length information,
* followed by n data elements.
*/
void parseArrayComplex(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, const char *szFieldName, fctComplexTypeParser pParserFunction)
{
proto_item *ti = proto_tree_add_text(tree, tvb, 0, -1, "Array of %s", szFieldName);
proto_tree *subtree = proto_item_add_subtree(ti, ett_opcua_array);
int i;
gint32 iLen;
/* read array length */
iLen = tvb_get_letohl(tvb, *pOffset);
proto_tree_add_item(subtree, hf_opcua_ArraySize, tvb, *pOffset, 4, ENC_LITTLE_ENDIAN);
if (iLen > MAX_ARRAY_LEN)
{
proto_item *pi;
pi = proto_tree_add_text(tree, tvb, *pOffset, 4, "Array length %d too large to process", iLen);
PROTO_ITEM_SET_GENERATED(pi);
return;
}
*pOffset += 4;
for (i=0; i<iLen; i++)
{
char szNum[20];
g_snprintf(szNum, 20, "[%i]", i);
(*pParserFunction)(subtree, tvb, pOffset, szNum);
}
}
void parseNodeId(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, const char *szFieldName)
{
proto_item *ti = proto_tree_add_text(tree, tvb, 0, -1, "%s: NodeId", szFieldName);
proto_tree *subtree = proto_item_add_subtree(ti, ett_opcua_nodeid);
gint iOffset = *pOffset;
guint8 EncodingMask;
EncodingMask = tvb_get_guint8(tvb, iOffset);
proto_tree_add_item(subtree, hf_opcua_nodeid_encodingmask, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
iOffset++;
switch(EncodingMask)
{
case 0x00: /* two byte node id */
proto_tree_add_item(subtree, hf_opcua_nodeid_numeric, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
iOffset+=1;
break;
case 0x01: /* four byte node id */
proto_tree_add_item(subtree, hf_opcua_nodeid_nsid, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
iOffset+=1;
proto_tree_add_item(subtree, hf_opcua_nodeid_numeric, tvb, iOffset, 2, ENC_LITTLE_ENDIAN);
iOffset+=2;
break;
case 0x02: /* numeric, that does not fit into four bytes */
proto_tree_add_item(subtree, hf_opcua_nodeid_nsid, tvb, iOffset, 2, ENC_LITTLE_ENDIAN);
iOffset+=2;
proto_tree_add_item(subtree, hf_opcua_nodeid_numeric, tvb, iOffset, 4, ENC_LITTLE_ENDIAN);
iOffset+=4;
break;
case 0x03: /* string */
proto_tree_add_item(subtree, hf_opcua_nodeid_nsid, tvb, iOffset, 2, ENC_LITTLE_ENDIAN);
iOffset+=2;
parseString(subtree, tvb, &iOffset, hf_opcua_String);
break;
case 0x04: /* guid */
proto_tree_add_item(subtree, hf_opcua_nodeid_nsid, tvb, iOffset, 2, ENC_LITTLE_ENDIAN);
iOffset+=2;
parseGuid(subtree, tvb, &iOffset, hf_opcua_Guid);
break;
case 0x05: /* byte string */
proto_tree_add_item(subtree, hf_opcua_nodeid_nsid, tvb, iOffset, 2, ENC_LITTLE_ENDIAN);
iOffset+=2;
parseByteString(subtree, tvb, &iOffset, hf_opcua_ByteString);
break;
};
*pOffset = iOffset;
}
void parseExtensionObject(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, const char *szFieldName)
{
gint iOffset = *pOffset;
guint8 EncodingMask;
guint32 TypeId;
proto_tree *extobj_tree;
proto_tree *mask_tree;
proto_item *ti;
/* add extension object subtree */
ti = proto_tree_add_text(tree, tvb, 0, -1, "%s : ExtensionObject", szFieldName);
extobj_tree = proto_item_add_subtree(ti, ett_opcua_extensionobject);
/* add nodeid subtree */
TypeId = getExtensionObjectType(tvb, &iOffset);
parseExpandedNodeId(extobj_tree, tvb, &iOffset, "TypeId");
/* parse encoding mask */
EncodingMask = tvb_get_guint8(tvb, iOffset);
ti = proto_tree_add_text(extobj_tree, tvb, 0, -1, "EncodingMask");
mask_tree = proto_item_add_subtree(ti, ett_opcua_extobj_encodingmask);
proto_tree_add_item(mask_tree, hf_opcua_extobj_mask_binbodyflag, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(mask_tree, hf_opcua_extobj_mask_xmlbodyflag, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
iOffset++;
if (EncodingMask & EXTOBJ_ENCODINGMASK_BINBODY_FLAG) /* has binary body ? */
{
dispatchExtensionObjectType(extobj_tree, tvb, &iOffset, TypeId);
}
*pOffset = iOffset;
}
void parseExpandedNodeId(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, const char *szFieldName)
{
proto_item *ti = proto_tree_add_text(tree, tvb, 0, -1, "%s: ExpandedNodeId", szFieldName);
proto_tree *subtree = proto_item_add_subtree(ti, ett_opcua_nodeid);
gint iOffset = *pOffset;
guint8 EncodingMask;
EncodingMask = tvb_get_guint8(tvb, iOffset);
proto_tree_add_item(subtree, hf_opcua_nodeid_encodingmask, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
iOffset++;
switch(EncodingMask)
{
case 0x00: /* two byte node id */
proto_tree_add_item(subtree, hf_opcua_nodeid_numeric, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
iOffset+=1;
break;
case 0x01: /* four byte node id */
proto_tree_add_item(subtree, hf_opcua_nodeid_nsid, tvb, iOffset, 1, ENC_LITTLE_ENDIAN);
iOffset+=1;
proto_tree_add_item(subtree, hf_opcua_nodeid_numeric, tvb, iOffset, 2, ENC_LITTLE_ENDIAN);
iOffset+=2;
break;
case 0x02: /* numeric, that does not fit into four bytes */
proto_tree_add_item(subtree, hf_opcua_nodeid_nsid, tvb, iOffset, 2, ENC_LITTLE_ENDIAN);
iOffset+=2;
proto_tree_add_item(subtree, hf_opcua_nodeid_numeric, tvb, iOffset, 4, ENC_LITTLE_ENDIAN);
iOffset+=4;
break;
case 0x03: /* string */
proto_tree_add_item(subtree, hf_opcua_nodeid_nsid, tvb, iOffset, 2, ENC_LITTLE_ENDIAN);
iOffset+=2;
parseString(subtree, tvb, &iOffset, hf_opcua_String);
break;
case 0x04: /* guid */
proto_tree_add_item(subtree, hf_opcua_nodeid_nsid, tvb, iOffset, 2, ENC_LITTLE_ENDIAN);
iOffset+=2;
parseGuid(subtree, tvb, &iOffset, hf_opcua_Guid);
break;
case 0x05: /* byte string */
proto_tree_add_item(subtree, hf_opcua_nodeid_nsid, tvb, iOffset, 2, ENC_LITTLE_ENDIAN);
iOffset+=2;
parseByteString(subtree, tvb, &iOffset, hf_opcua_ByteString);
break;
};
if (EncodingMask & NODEID_URIMASK)
{
parseString(subtree, tvb, &iOffset, hf_opcua_Uri);
}
if (EncodingMask & NODEID_SERVERINDEXFLAG)
{
parseUInt32(subtree, tvb, &iOffset, hf_opcua_ServerIndex);
}
*pOffset = iOffset;
}
guint32 getExtensionObjectType(tvbuff_t *tvb, gint *pOffset)
{
gint iOffset = *pOffset;
guint8 EncodingMask;
guint32 Numeric = 0;
EncodingMask = tvb_get_guint8(tvb, iOffset);
iOffset++;
switch(EncodingMask)
{
case 0x00: /* two byte node id */
Numeric = tvb_get_guint8(tvb, iOffset);
iOffset+=1;
break;
case 0x01: /* four byte node id */
iOffset+=1;
Numeric = tvb_get_letohs(tvb, iOffset);
break;
case 0x02: /* numeric, that does not fit into four bytes */
iOffset+=4;
Numeric = tvb_get_letohl(tvb, iOffset);
break;
case 0x03: /* string */
case 0x04: /* uri */
case 0x05: /* guid */
case 0x06: /* byte string */
/* NOT USED */
break;
};
return Numeric;
}
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