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|
/* packet-dis-pdus.c
* Routines and definitions for DIS PDU parsing.
* Copyright 2005, Scientific Research Corporation
* Initial implementation by Jeremy Ouellette <jouellet@scires.com>
*
* $Id$
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include "packet-dis-pdus.h"
#include "packet-dis-fields.h"
guint32 numArticulations;
guint32 numFixedData;
guint32 numVariableData;
gint ettArticulations[DIS_PDU_MAX_ARTICULATIONS];
gint ettFixedData;
gint ettVariableData;
DIS_ParserNode DIS_PARSER_ENTITY_STATE_PDU[] =
{
{ DIS_FIELDTYPE_ENTITY_ID, "Entity ID",0,0,0 },
{ DIS_FIELDTYPE_FORCE_ID, "Force ID",0,0,0 },
{ DIS_FIELDTYPE_UINT8, "Number of Articulation Parameters",0,0,&numArticulations },
{ DIS_FIELDTYPE_ENTITY_TYPE, "Entity Type",0,0,0 },
{ DIS_FIELDTYPE_ENTITY_TYPE, "Alternative Entity Type",0,0,0 },
{ DIS_FIELDTYPE_LINEAR_VELOCITY, "Entity Linear Velocity",0,0,0 },
{ DIS_FIELDTYPE_LOCATION_WORLD, "Entity Location",0,0,0 },
{ DIS_FIELDTYPE_ORIENTATION, "Entity Orientation",0,0,0 },
{ DIS_FIELDTYPE_APPEARANCE, "Entity Appearance",0,0,0 },
{ DIS_FIELDTYPE_DEAD_RECKONING_PARAMS, "Dead Reckoning Parameters",0,0,0 },
{ DIS_FIELDTYPE_ENTITY_MARKING, "Entity Marking",0,0,0 },
{ DIS_FIELDTYPE_CAPABILITIES, "Capabilities",0,0,0 },
{ DIS_FIELDTYPE_ARTICULATION_PARAMETERS, "Articulation Parameters",0,0,0 },
{ DIS_FIELDTYPE_END, NULL,0,0,0 }
};
DIS_ParserNode DIS_PARSER_FIRE_PDU[] =
{
{ DIS_FIELDTYPE_ENTITY_ID, "Firing Entity ID",0,0,0 },
{ DIS_FIELDTYPE_ENTITY_ID, "Target Entity ID",0,0,0 },
{ DIS_FIELDTYPE_ENTITY_ID, "Munition ID",0,0,0 },
{ DIS_FIELDTYPE_EVENT_ID, "Event ID",0,0,0 },
{ DIS_FIELDTYPE_UINT32, "Fire Mission Index",0,0,0 },
{ DIS_FIELDTYPE_LOCATION_WORLD, "Location in World Coordinates",0,0,0 },
{ DIS_FIELDTYPE_BURST_DESCRIPTOR, "Burst Descriptor",0,0,0 },
{ DIS_FIELDTYPE_LINEAR_VELOCITY, "Velocity",0,0,0 },
{ DIS_FIELDTYPE_FLOAT32, "Range",0,0,0 },
{ DIS_FIELDTYPE_END, NULL,0,0,0 }
};
DIS_ParserNode DIS_PARSER_DETONATION_PDU[] =
{
{ DIS_FIELDTYPE_ENTITY_ID, "Firing Entity ID",0,0,0 },
{ DIS_FIELDTYPE_ENTITY_ID, "Target Entity ID",0,0,0 },
{ DIS_FIELDTYPE_ENTITY_ID, "Munition ID",0,0,0 },
{ DIS_FIELDTYPE_EVENT_ID, "Event ID",0,0,0 },
{ DIS_FIELDTYPE_LINEAR_VELOCITY, "Velocity",0,0,0 },
{ DIS_FIELDTYPE_LOCATION_WORLD, "Location in World Coordinates",0,0,0 },
{ DIS_FIELDTYPE_BURST_DESCRIPTOR, "Burst Descriptor",0,0,0 },
{ DIS_FIELDTYPE_LOCATION_ENTITY, "Location in Entity Coordinates",0,0,0 },
{ DIS_FIELDTYPE_DETONATION_RESULT, "Detonation Result",0,0,0 },
{ DIS_FIELDTYPE_UINT8, "Number of Articulation Parameters",0,0,0 },
{ DIS_FIELDTYPE_PAD16, "Padding",0,0,0 },
{ DIS_FIELDTYPE_ARTICULATION_PARAMETERS, "Articulation Parameters",0,0,0 },
{ DIS_FIELDTYPE_END, NULL,0,0,0 }
};
DIS_ParserNode DIS_PARSER_DATA_PDU[] =
{
{ DIS_FIELDTYPE_ENTITY_ID, "Originating Entity ID",0,0,0 },
{ DIS_FIELDTYPE_ENTITY_ID, "Receiving Entity ID",0,0,0 },
{ DIS_FIELDTYPE_REQUEST_ID, "Request ID",0,0,0 },
{ DIS_FIELDTYPE_PAD32, "Padding",0,0,0 },
{ DIS_FIELDTYPE_NUM_FIXED_DATA, "Number of fixed data fields",0,0,&numFixedData },
{ DIS_FIELDTYPE_NUM_VARIABLE_DATA, "Number of variable data fields",0,0,&numVariableData },
{ DIS_FIELDTYPE_FIXED_DATUM, "Fixed data",0,0,0 },
{ DIS_FIELDTYPE_VARIABLE_DATUM, "Variable data",0,0,0 },
{ DIS_FIELDTYPE_END, NULL,0,0,0 }
};
DIS_ParserNode DIS_PARSER_DATA_QUERY_PDU[] =
{
{ DIS_FIELDTYPE_ENTITY_ID, "Originating Entity ID",0,0,0 },
{ DIS_FIELDTYPE_ENTITY_ID, "Receiving Entity ID",0,0,0 },
{ DIS_FIELDTYPE_REQUEST_ID, "Request ID",0,0,0 },
{ DIS_FIELDTYPE_TIME_INTERVAL, "Time interval",0,0,0 },
{ DIS_FIELDTYPE_NUM_FIXED_DATA, "Number of fixed data fields",0,0,&numFixedData },
{ DIS_FIELDTYPE_NUM_VARIABLE_DATA, "Number of variable data fields",0,0,&numVariableData },
{ DIS_FIELDTYPE_FIXED_DATUM, "Fixed data",0,0,0 },
{ DIS_FIELDTYPE_VARIABLE_DATUM, "Variable data",0,0,0 },
{ DIS_FIELDTYPE_END, NULL,0,0,0 }
};
/* Initialize the parsers for each PDU type and the standard DIS header.
*/
void initializeParsers(void)
{
initializeParser(DIS_PARSER_ENTITY_STATE_PDU);
initializeParser(DIS_PARSER_FIRE_PDU);
initializeParser(DIS_PARSER_DETONATION_PDU);
initializeParser(DIS_FIELDS_PDU_HEADER);
initializeParser(DIS_PARSER_DATA_PDU);
initializeParser(DIS_PARSER_DATA_QUERY_PDU);
}
/* Create a specific subtree for a PDU or a composite PDU field.
*/
DIS_ParserNode *createSubtree(DIS_ParserNode parserNodes[], gint *ettVar)
{
guint fieldIndex = 0;
guint fieldCount;
gint *ett[1];
DIS_ParserNode *newSubtree;
while (parserNodes[fieldIndex].fieldType != DIS_FIELDTYPE_END)
{
++fieldIndex;
}
fieldCount = fieldIndex + 1;
newSubtree = (DIS_ParserNode*)g_malloc(sizeof(DIS_ParserNode) * fieldCount);
memcpy(newSubtree, parserNodes, sizeof(DIS_ParserNode) * fieldCount);
initializeParser(newSubtree);
*ettVar = -1;
ett[0] = ettVar;
proto_register_subtree_array(ett, array_length(ett));
return newSubtree;
}
/* Initialize an array of parser nodes.
*/
void initializeParser(DIS_ParserNode parserNodes[])
{
guint parserIndex = 0;
/* Create the parser subtrees for each of the composite field types.
*/
while (parserNodes[parserIndex].fieldType != DIS_FIELDTYPE_END)
{
switch (parserNodes[parserIndex].fieldType)
{
case DIS_FIELDTYPE_APPEARANCE:
parserNodes[parserIndex].children = createSubtree(
DIS_FIELDS_NONE,
&parserNodes[parserIndex].ettVar);
break;
case DIS_FIELDTYPE_ARTICULATION_PARAMETERS:
parserNodes[parserIndex].children = createSubtree(
DIS_FIELDS_ARTICULATION_PARAMETER,
&parserNodes[parserIndex].ettVar);
break;
case DIS_FIELDTYPE_BURST_DESCRIPTOR:
parserNodes[parserIndex].children = createSubtree(
DIS_FIELDS_BURST_DESCRIPTOR,
&parserNodes[parserIndex].ettVar);
break;
case DIS_FIELDTYPE_ENTITY_ID:
parserNodes[parserIndex].children = createSubtree(
DIS_FIELDS_ENTITY_ID,
&parserNodes[parserIndex].ettVar);
break;
case DIS_FIELDTYPE_ENTITY_TYPE:
parserNodes[parserIndex].children = createSubtree(
DIS_FIELDS_ENTITY_TYPE,
&parserNodes[parserIndex].ettVar);
break;
case DIS_FIELDTYPE_EVENT_ID:
parserNodes[parserIndex].children = createSubtree(
DIS_FIELDS_EVENT_ID,
&parserNodes[parserIndex].ettVar);
break;
case DIS_FIELDTYPE_LINEAR_VELOCITY:
parserNodes[parserIndex].children = createSubtree(
DIS_FIELDS_LINEAR_VELOCITY,
&parserNodes[parserIndex].ettVar);
break;
case DIS_FIELDTYPE_LOCATION_WORLD:
parserNodes[parserIndex].children = createSubtree(
DIS_FIELDS_LOCATION_WORLD,
&parserNodes[parserIndex].ettVar);
break;
case DIS_FIELDTYPE_LOCATION_ENTITY:
parserNodes[parserIndex].children = createSubtree(
DIS_FIELDS_LOCATION_ENTITY,
&parserNodes[parserIndex].ettVar);
break;
case DIS_FIELDTYPE_ORIENTATION:
parserNodes[parserIndex].children = createSubtree(
DIS_FIELDS_ORIENTATION,
&parserNodes[parserIndex].ettVar);
break;
case DIS_FIELDTYPE_FIXED_DATUM:
parserNodes[parserIndex].children = createSubtree(
DIS_FIELDS_FIXED_DATUM,
&parserNodes[parserIndex].ettVar);
break;
case DIS_FIELDTYPE_VARIABLE_DATUM:
parserNodes[parserIndex].children = createSubtree(
DIS_FIELDS_VARIABLE_DATUM,
&parserNodes[parserIndex].ettVar);
break;
default:
break;
}
++parserIndex;
}
}
/* Parse packet data based on a specified array of DIS_ParserNodes.
*/
gint parseFields(tvbuff_t *tvb, proto_tree *tree, gint offset, DIS_ParserNode parserNodes[])
{
guint fieldIndex = 0;
while (parserNodes[fieldIndex].fieldType != DIS_FIELDTYPE_END)
{
proto_item *newField = 0;
switch(parserNodes[fieldIndex].fieldType)
{
case DIS_FIELDTYPE_INT8:
offset = parseField_Int(tvb, tree, offset,
parserNodes[fieldIndex], 1);
break;
case DIS_FIELDTYPE_INT16:
offset = parseField_Int(tvb, tree, offset,
parserNodes[fieldIndex], 2);
break;
case DIS_FIELDTYPE_INT32:
offset = parseField_Int(tvb, tree, offset,
parserNodes[fieldIndex], 4);
break;
case DIS_FIELDTYPE_INT64:
offset = parseField_Int(tvb, tree, offset,
parserNodes[fieldIndex], 8);
break;
case DIS_FIELDTYPE_UINT8:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 1);
break;
case DIS_FIELDTYPE_UINT16:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 2);
break;
case DIS_FIELDTYPE_UINT32:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 4);
break;
case DIS_FIELDTYPE_UINT64:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 8);
break;
case DIS_FIELDTYPE_FLOAT32:
offset = parseField_Float(tvb, tree, offset,
parserNodes[fieldIndex]);
break;
case DIS_FIELDTYPE_FLOAT64:
offset = parseField_Double(tvb, tree, offset,
parserNodes[fieldIndex]);
break;
case DIS_FIELDTYPE_PAD8:
offset = parseField_Pad(tvb, tree, offset,
parserNodes[fieldIndex], 1);
break;
case DIS_FIELDTYPE_PAD16:
offset = parseField_Pad(tvb, tree, offset,
parserNodes[fieldIndex], 2);
break;
case DIS_FIELDTYPE_PAD32:
offset = parseField_Pad(tvb, tree, offset,
parserNodes[fieldIndex], 4);
break;
case DIS_FIELDTYPE_APPEARANCE:
{
proto_item *newSubtree;
newField = proto_tree_add_text(tree, tvb, offset, 4, "%s",
parserNodes[fieldIndex].fieldLabel);
newSubtree = proto_item_add_subtree(newField,
parserNodes[fieldIndex].ettVar);
offset = parseField_Bitmask(tvb, newSubtree, offset,
parserNodes[fieldIndex], 4);
}
break;
case DIS_FIELDTYPE_ARTIC_PARAM_TYPE_DESIGNATOR:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 1);
break;
case DIS_FIELDTYPE_ARTIC_PARAM_TYPE:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 4);
break;
case DIS_FIELDTYPE_CAPABILITIES:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 4);
break;
case DIS_FIELDTYPE_CATEGORY:
offset = parseField_Enum(tvb, tree, offset,
parserNodes[fieldIndex], 1);
break;
case DIS_FIELDTYPE_COUNTRY:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 2);
break;
case DIS_FIELDTYPE_DEAD_RECKONING_PARAMS:
/* This is really a struct... needs a field parser.
* For now, just skip the 12 bytes.
*/
offset = parseField_Bytes(tvb, tree, offset,
parserNodes[fieldIndex], 40);
break;
case DIS_FIELDTYPE_DETONATION_RESULT:
offset = parseField_Enum(tvb, tree, offset,
parserNodes[fieldIndex], 1);
break;
case DIS_FIELDTYPE_DOMAIN:
offset = parseField_Enum(tvb, tree, offset,
parserNodes[fieldIndex], 1);
break;
case DIS_FIELDTYPE_ENTITY_KIND:
offset = parseField_Enum(tvb, tree, offset,
parserNodes[fieldIndex], 1);
break;
case DIS_FIELDTYPE_ENTITY_MARKING:
/* This is really a struct... needs a field parser.
* For now, just skip the 12 bytes.
*/
offset = parseField_Bytes(tvb, tree, offset,
parserNodes[fieldIndex], 12);
break;
case DIS_FIELDTYPE_EXTRA:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 1);
break;
case DIS_FIELDTYPE_FORCE_ID:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 1);
break;
case DIS_FIELDTYPE_FUSE:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 2);
break;
case DIS_FIELDTYPE_PDU_TYPE:
offset = parseField_Enum(tvb, tree, offset,
parserNodes[fieldIndex], 1);
break;
case DIS_FIELDTYPE_PROTOCOL_FAMILY:
offset = parseField_Enum(tvb, tree, offset,
parserNodes[fieldIndex], 1);
break;
case DIS_FIELDTYPE_PROTOCOL_VERSION:
offset = parseField_Enum(tvb, tree, offset,
parserNodes[fieldIndex], 1);
break;
case DIS_FIELDTYPE_SPECIFIC:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 1);
break;
case DIS_FIELDTYPE_SUBCATEGORY:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 1);
break;
case DIS_FIELDTYPE_TIMESTAMP:
offset = parseField_Timestamp(tvb, tree, offset,
parserNodes[fieldIndex]);
break;
case DIS_FIELDTYPE_WARHEAD:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 2);
break;
case DIS_FIELDTYPE_BURST_DESCRIPTOR:
case DIS_FIELDTYPE_ENTITY_ID:
case DIS_FIELDTYPE_EVENT_ID:
case DIS_FIELDTYPE_LINEAR_VELOCITY:
case DIS_FIELDTYPE_LOCATION_WORLD:
case DIS_FIELDTYPE_LOCATION_ENTITY:
case DIS_FIELDTYPE_ENTITY_TYPE:
case DIS_FIELDTYPE_ORIENTATION:
newField = proto_tree_add_text(tree, tvb, offset, -1, "%s",
parserNodes[fieldIndex].fieldLabel);
if (parserNodes[fieldIndex].children != 0)
{
proto_item *newSubtree = proto_item_add_subtree(newField,
parserNodes[fieldIndex].ettVar);
offset = parseFields(tvb, newSubtree, offset,
parserNodes[fieldIndex].children);
}
proto_item_set_end(newField, tvb, offset);
break;
case DIS_FIELDTYPE_ARTICULATION_PARAMETERS:
{
guint i;
if (numArticulations > DIS_PDU_MAX_ARTICULATIONS)
{
numArticulations = DIS_PDU_MAX_ARTICULATIONS;
}
for (i = 0; i < numArticulations; ++i)
{
proto_item *newSubtree;
newField = proto_tree_add_text(tree, tvb, offset, -1, "%s",
parserNodes[fieldIndex].fieldLabel);
newSubtree = proto_item_add_subtree(newField,
ettArticulations[i]);
offset = parseFields(tvb, newSubtree, offset,
parserNodes[fieldIndex].children);
proto_item_set_end(newField, tvb, offset);
}
}
break;
case DIS_FIELDTYPE_NUM_FIXED_DATA:
case DIS_FIELDTYPE_NUM_VARIABLE_DATA:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 4);
break;
case DIS_FIELDTYPE_FIXED_DATUM:
{
guint i;
if (numFixedData > INT32_MAX)
{
numFixedData = INT32_MAX;
}
for (i = 0; i < numFixedData; ++i)
{
proto_item *newSubtree;
newField = proto_tree_add_text(tree, tvb, offset, -1, "%s",
parserNodes[fieldIndex].fieldLabel);
newSubtree = proto_item_add_subtree(newField, ettFixedData);
offset = parseFields(tvb, newSubtree, offset, parserNodes[fieldIndex].children);
proto_item_set_end(newField, tvb, offset);
}
}
break;
case DIS_FIELDTYPE_VARIABLE_DATUM:
{
guint i;
if (numVariableData > INT32_MAX)
{
numVariableData = INT32_MAX;
}
for (i = 0; i < numVariableData; ++i)
{
proto_item *newSubtree;
newField = proto_tree_add_text(tree, tvb, offset, -1, "%s",
parserNodes[fieldIndex].fieldLabel);
newSubtree = proto_item_add_subtree(newField, ettVariableData);
offset = parseFields(tvb, newSubtree, offset, parserNodes[fieldIndex].children);
proto_item_set_end(newField, tvb, offset);
}
}
break;
case DIS_FIELDTYPE_DATUM_ID:
case DIS_FIELDTYPE_DATUM_LENGTH:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 4);
break;
case DIS_FIELDTYPE_FIXED_DATUM_VALUE:
offset = parseField_Bytes(tvb, tree, offset,
parserNodes[fieldIndex], 4);
break;
case DIS_FIELDTYPE_VARIABLE_DATUM_VALUE:
{
guint lengthInBytes;
lengthInBytes = variableDatumLength / 8;
if (variableDatumLength % 8 > 0)
{
lengthInBytes++;
}
offset = parseField_Bytes(tvb, tree, offset,
parserNodes[fieldIndex], lengthInBytes);
}
break;
case DIS_FIELDTYPE_REQUEST_ID:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 4);
break;
case DIS_FIELDTYPE_TIME_INTERVAL:
offset = parseField_UInt(tvb, tree, offset,
parserNodes[fieldIndex], 4);
break;
default:
break;
}
++fieldIndex;
}
return offset;
}
|
