createEventMessage.c

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 *  This file is part of OpenJAUS.  OpenJAUS is distributed under the BSD 
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// File Name: createEventMessage.c
//
// Written By: Danny Kent (jaus AT dannykent DOT com), Tom Galluzzo (galluzzo AT gmail DOT com)
//
// Version: 3.3.0a
//
// Date: 08/07/08
//
// Description: This file defines the functionality of a CreateEventMessage



#include <stdlib.h>
#include <string.h>
#include "jaus.h"

static const int commandCode = JAUS_CREATE_EVENT;
static const int maxDataSizeBytes = 512000; // Max Message size: 500K

static JausBoolean headerFromBuffer(CreateEventMessage message, unsigned char *buffer, unsigned int bufferSizeBytes);
static JausBoolean headerToBuffer(CreateEventMessage message, unsigned char *buffer, unsigned int bufferSizeBytes);

static JausBoolean dataFromBuffer(CreateEventMessage message, unsigned char *buffer, unsigned int bufferSizeBytes);
static int dataToBuffer(CreateEventMessage message, unsigned char *buffer, unsigned int bufferSizeBytes);
static void dataInitialize(CreateEventMessage message);
static void dataDestroy(CreateEventMessage message);
static unsigned int dataSize(CreateEventMessage message);

// ************************************************************************************************************** //
//                                    USER CONFIGURED FUNCTIONS
// ************************************************************************************************************** //

// Initializes the message-specific fields
static void dataInitialize(CreateEventMessage message)
{
	// Set initial values of message fields

	message->presenceVector = newJausByte(JAUS_BYTE_PRESENCE_VECTOR_ALL_ON);	// 1: Presence Vector
	message->requestId = newJausByte(0);					// Local request ID for use in confirm event
	message->reportMessageCode = newJausUnsignedShort(0);	// Command Code of the resulting report
	message->eventType = newJausByte(0);					// Enumeration of Event types
	message->eventBoundary = newJausByte(0);				// Enumeration of Event Boundary Conditions
	message->limitDataField = newJausByte(0);				// Field from Report for Limit Trigger
	message->lowerLimit = jausEventLimitCreate();			// Lower Event Limit
	message->lowerLimit->dataType = EVENT_LIMIT_BYTE_TYPE;
	message->upperLimit = jausEventLimitCreate();			// Upper Event Limit
	message->upperLimit->dataType = EVENT_LIMIT_BYTE_TYPE;
	message->stateLimit = jausEventLimitCreate();			// State Event Limit used for Equal Boundary
	message->stateLimit->dataType = EVENT_LIMIT_BYTE_TYPE;
	message->requestedMinimumRate = newJausDouble(0.0);		// For Periodic Events for unchanging value, Scaled UnsignedShort (0, 1092)
	message->requestedUpdateRate = newJausDouble(0.0);		// For Periodic Events, Scaled UnsignedShort (0, 1092)
	message->queryMessage = NULL;							// Query Message (not including header) to use for response	
}

// Destructs the message-specific fields
static void dataDestroy(CreateEventMessage message)
{
	// Free message fields
	if(message->queryMessage) jausMessageDestroy(message->queryMessage);
	if(message->lowerLimit) jausEventLimitDestroy(message->lowerLimit);
	if(message->upperLimit) jausEventLimitDestroy(message->upperLimit);
	if(message->stateLimit) jausEventLimitDestroy(message->stateLimit);
}

// Return boolean of success
static JausBoolean dataFromBuffer(CreateEventMessage message, unsigned char *buffer, unsigned int bufferSizeBytes)
{
	int index = 0;
	JausUnsignedShort tempUShort;
	JausUnsignedInteger queryMessageSize;

	if(bufferSizeBytes == message->dataSize)
	{
		// Unpack Message Fields from Buffer
		// Presence Vector
		if(!jausByteFromBuffer(&message->presenceVector, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
		index += JAUS_BYTE_SIZE_BYTES;

		// Request ID
		if(!jausByteFromBuffer(&message->requestId, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
		index += JAUS_BYTE_SIZE_BYTES;

		// Report Message Code
		if(!jausUnsignedShortFromBuffer(&message->reportMessageCode, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
		index += JAUS_UNSIGNED_SHORT_SIZE_BYTES;		

		// Event Type
		if(!jausByteFromBuffer(&message->eventType, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
		index += JAUS_BYTE_SIZE_BYTES;
		
		if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_BOUNDARY_BIT))
		{
			// Event Boundary
			if(!jausByteFromBuffer(&message->eventBoundary, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
			index += JAUS_BYTE_SIZE_BYTES;
		}

		if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_DATA_FIELD_BIT))
		{
			// Limit Data Field
			if(!jausByteFromBuffer(&message->limitDataField, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
			index += JAUS_BYTE_SIZE_BYTES;
		}
		
		if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_LOWER_LIMIT_BIT))
		{		
			// Lower Limit
			if(!jausEventLimitFromBuffer(&message->lowerLimit, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
			index += jausEventLimitSize(message->lowerLimit);
		}
		else
		{
			message->lowerLimit = NULL;
		}
		
		if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_UPPER_LIMIT_BIT))
		{		
			// Upper Limit
			if(!jausEventLimitFromBuffer(&message->upperLimit, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
			index += jausEventLimitSize(message->upperLimit);
		}
		else
		{
			message->upperLimit = NULL;
		}

		if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_STATE_LIMIT_BIT))
		{		
			// State Limit
			if(!jausEventLimitFromBuffer(&message->stateLimit, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
			index += jausEventLimitSize(message->stateLimit);
		}
		else
		{
			message->stateLimit = NULL;
		}
		
		if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_MINIMUM_RATE_BIT))
		{		
			// Minimum Periodic Rate 
			if(!jausUnsignedShortFromBuffer(&tempUShort, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
			index += JAUS_UNSIGNED_SHORT_SIZE_BYTES;
			
			// Scaled Int (0, 1092);
			message->requestedMinimumRate = jausUnsignedShortToDouble(tempUShort, 0, 1092);
		}
		
		if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_REQUESTED_RATE_BIT))
		{		
			// Periodic Rate 
			if(!jausUnsignedShortFromBuffer(&tempUShort, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
			index += JAUS_UNSIGNED_SHORT_SIZE_BYTES;
			
			// Scaled Int (0, 1092);
			message->requestedUpdateRate = jausUnsignedShortToDouble(tempUShort, 0, 1092);
		}
		
		if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_QUERY_MESSAGE_BIT))
		{		
			// Query Message Size
			if(!jausUnsignedIntegerFromBuffer(&queryMessageSize, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
			index += JAUS_UNSIGNED_INTEGER_SIZE_BYTES;
			
			// Query Message Body
			if(bufferSizeBytes-index < queryMessageSize) return JAUS_FALSE;

			// Setup our Query Message
			message->queryMessage = jausMessageCreate();
			if(!message->queryMessage) return JAUS_FALSE;

			message->queryMessage->dataSize = queryMessageSize;
			jausAddressCopy(message->queryMessage->source, message->source);
			jausAddressCopy(message->queryMessage->destination, message->destination);
			
			message->queryMessage->commandCode = jausMessageGetComplimentaryCommandCode(message->reportMessageCode);

			// Allocate Memory
			message->queryMessage->data = (unsigned char *) malloc(queryMessageSize);
			
			// Copy query message body to the data member
			memcpy(message->queryMessage->data, buffer+index, queryMessageSize);
			index += queryMessageSize;
		}
		return JAUS_TRUE;
	}
	else
	{
		return JAUS_FALSE;
	}
}

// Returns number of bytes put into the buffer
static int dataToBuffer(CreateEventMessage message, unsigned char *buffer, unsigned int bufferSizeBytes)
{
	int index = 0;
	JausUnsignedShort tempUShort;

	if(bufferSizeBytes >= dataSize(message))
	{
		// Unpack Message Fields from Buffer
		// Presence Vector
		if(!jausByteToBuffer(message->presenceVector, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
		index += JAUS_BYTE_SIZE_BYTES;
		
		// Request Id
		if(!jausByteToBuffer(message->requestId, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
		index += JAUS_BYTE_SIZE_BYTES;

		// Message Code
		if(!jausUnsignedShortToBuffer(message->reportMessageCode, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
		index += JAUS_UNSIGNED_SHORT_SIZE_BYTES;
		
		// Event Type
		if(!jausByteToBuffer(message->eventType, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
		index += JAUS_BYTE_SIZE_BYTES;
		
		if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_BOUNDARY_BIT))
		{
			// Event Boundary
			if(!jausByteToBuffer(message->eventBoundary, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
			index += JAUS_BYTE_SIZE_BYTES;
		}

		if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_DATA_FIELD_BIT))
		{
			// Data Field
			if(!jausByteToBuffer(message->limitDataField, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
			index += JAUS_BYTE_SIZE_BYTES;
		}
		
		if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_LOWER_LIMIT_BIT))
		{		
			// Lower Limit
			if(!jausEventLimitToBuffer(message->lowerLimit, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
			index += jausEventLimitSize(message->lowerLimit);
		}
		
		if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_UPPER_LIMIT_BIT))
		{		
			// Upper Limit
			if(!jausEventLimitToBuffer(message->upperLimit, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
			index += jausEventLimitSize(message->upperLimit);
		}

		if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_STATE_LIMIT_BIT))
		{		
			// State Limit
			if(!jausEventLimitToBuffer(message->stateLimit, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
			index += jausEventLimitSize(message->stateLimit);
		}
		
		if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_MINIMUM_RATE_BIT))
		{		
			// Scaled Int (0, 1092);
			tempUShort = jausUnsignedShortFromDouble(message->requestedMinimumRate, 0, 1092);

			// Minimum Periodic Rate 
			if(!jausUnsignedShortToBuffer(tempUShort, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
			index += JAUS_UNSIGNED_SHORT_SIZE_BYTES;
		}
		
		if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_REQUESTED_RATE_BIT))
		{		
			// Scaled Int (0, 1092);
			tempUShort = jausUnsignedShortFromDouble(message->requestedUpdateRate, 0, 1092);

			// Minimum Periodic Rate 
			if(!jausUnsignedShortToBuffer(tempUShort, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
			index += JAUS_UNSIGNED_SHORT_SIZE_BYTES;
		}
	
		if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_QUERY_MESSAGE_BIT))
		{		
			//Query Message Size 
			if(message->queryMessage)
			{
				if(!jausUnsignedIntegerToBuffer(message->queryMessage->dataSize, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
				index += JAUS_UNSIGNED_INTEGER_SIZE_BYTES;
			
				// Query Message Body
				if(bufferSizeBytes-index < message->queryMessage->dataSize) return JAUS_FALSE;
				memcpy(buffer+index, message->queryMessage->data, message->queryMessage->dataSize);
				index += message->queryMessage->dataSize;
			}
			else
			{
				if(!jausUnsignedIntegerToBuffer(0, buffer+index, bufferSizeBytes-index)) return JAUS_FALSE;
				index += JAUS_UNSIGNED_INTEGER_SIZE_BYTES;
			}
		}
	}

	return index;
}

// Returns number of bytes put into the buffer
static unsigned int dataSize(CreateEventMessage message)
{
	int index = 0;

	// Presence Vector
	index += JAUS_BYTE_SIZE_BYTES;

	// Request ID
	index += JAUS_BYTE_SIZE_BYTES;
	
	// Message Code
	index += JAUS_UNSIGNED_SHORT_SIZE_BYTES;
	
	// Event Type
	index += JAUS_BYTE_SIZE_BYTES;
	
	if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_BOUNDARY_BIT))
	{
		index += JAUS_BYTE_SIZE_BYTES;
	}

	if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_DATA_FIELD_BIT))
	{
		index += JAUS_BYTE_SIZE_BYTES;
	}
	
	if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_LOWER_LIMIT_BIT))
	{		
		index += jausEventLimitSize(message->lowerLimit);
	}
	
	if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_UPPER_LIMIT_BIT))
	{		
		index += jausEventLimitSize(message->upperLimit);
	}

	if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_STATE_LIMIT_BIT))
	{		
		index += jausEventLimitSize(message->stateLimit);
	}
	
	if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_MINIMUM_RATE_BIT))
	{		
		index += JAUS_UNSIGNED_SHORT_SIZE_BYTES;
	}
	
	if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_REQUESTED_RATE_BIT))
	{		
		index += JAUS_UNSIGNED_SHORT_SIZE_BYTES;
	}

	if(jausByteIsBitSet(message->presenceVector, CREATE_EVENT_PV_QUERY_MESSAGE_BIT))
	{		
		index += JAUS_UNSIGNED_INTEGER_SIZE_BYTES;

		// Jaus Message
		if(message->queryMessage) index += message->queryMessage->dataSize;
	}


	return index;
}


// ************************************************************************************************************** //
//                                    NON-USER CONFIGURED FUNCTIONS
// ************************************************************************************************************** //

CreateEventMessage createEventMessageCreate(void)
{
	CreateEventMessage message;

	message = (CreateEventMessage)malloc( sizeof(CreateEventMessageStruct) );
	if(message == NULL)
	{
		return NULL;
	}
	
	// Initialize Values
	message->properties.priority = JAUS_DEFAULT_PRIORITY;
	message->properties.ackNak = JAUS_ACK_NAK_NOT_REQUIRED;
	message->properties.scFlag = JAUS_NOT_SERVICE_CONNECTION_MESSAGE;
	message->properties.expFlag = JAUS_NOT_EXPERIMENTAL_MESSAGE;
	message->properties.version = JAUS_VERSION_3_3;
	message->properties.reserved = 0;
	message->commandCode = commandCode;
	message->destination = jausAddressCreate();
	message->source = jausAddressCreate();
	message->dataFlag = JAUS_SINGLE_DATA_PACKET;
	message->dataSize = maxDataSizeBytes;
	message->sequenceNumber = 0;
	
	dataInitialize(message);
	message->dataSize = dataSize(message);
	
	return message;	
}

void createEventMessageDestroy(CreateEventMessage message)
{
	dataDestroy(message);
	jausAddressDestroy(message->source);
	jausAddressDestroy(message->destination);
	free(message);
	message = NULL;
}

JausBoolean createEventMessageFromBuffer(CreateEventMessage message, unsigned char* buffer, unsigned int bufferSizeBytes)
{
	int index = 0;
	
	if(headerFromBuffer(message, buffer+index, bufferSizeBytes-index))
	{
		index += JAUS_HEADER_SIZE_BYTES;
		if(dataFromBuffer(message, buffer+index, bufferSizeBytes-index))
		{
			return JAUS_TRUE;
		}
		else
		{
			return JAUS_FALSE;
		}
	}
	else
	{
		return JAUS_FALSE;
	}
}

JausBoolean createEventMessageToBuffer(CreateEventMessage message, unsigned char *buffer, unsigned int bufferSizeBytes)
{
	if(bufferSizeBytes < createEventMessageSize(message))
	{
		return JAUS_FALSE; //improper size	
	}
	else
	{	
		message->dataSize = dataToBuffer(message, buffer+JAUS_HEADER_SIZE_BYTES, bufferSizeBytes - JAUS_HEADER_SIZE_BYTES);
		if(headerToBuffer(message, buffer, bufferSizeBytes))
		{
			return JAUS_TRUE;
		}
		else
		{
			return JAUS_FALSE; // headerToCreateEventBuffer failed
		}
	}
}

CreateEventMessage createEventMessageFromJausMessage(JausMessage jausMessage)
{
	CreateEventMessage message;

	if(jausMessage->commandCode != commandCode)
	{
		return NULL; // Wrong message type
	}
	else
	{
		message = (CreateEventMessage)malloc( sizeof(CreateEventMessageStruct) );
		if(message == NULL)
		{
			return NULL;
		}
		
		message->properties.priority = jausMessage->properties.priority;
		message->properties.ackNak = jausMessage->properties.ackNak;
		message->properties.scFlag = jausMessage->properties.scFlag;
		message->properties.expFlag = jausMessage->properties.expFlag;
		message->properties.version = jausMessage->properties.version;
		message->properties.reserved = jausMessage->properties.reserved;
		message->commandCode = jausMessage->commandCode;
		message->destination = jausAddressCreate();
		*message->destination = *jausMessage->destination;
		message->source = jausAddressCreate();
		*message->source = *jausMessage->source;
		message->dataSize = jausMessage->dataSize;
		message->dataFlag = jausMessage->dataFlag;
		message->sequenceNumber = jausMessage->sequenceNumber;
		
		// Unpack jausMessage->data
		if(dataFromBuffer(message, jausMessage->data, jausMessage->dataSize))
		{
			return message;
		}
		else
		{
			return NULL;
		}
	}
}

JausMessage createEventMessageToJausMessage(CreateEventMessage message)
{
	JausMessage jausMessage;

	jausMessage = (JausMessage)malloc( sizeof(struct JausMessageStruct) );
	if(jausMessage == NULL)
	{
		return NULL;
	}	
	
	jausMessage->properties.priority = message->properties.priority;
	jausMessage->properties.ackNak = message->properties.ackNak;
	jausMessage->properties.scFlag = message->properties.scFlag;
	jausMessage->properties.expFlag = message->properties.expFlag;
	jausMessage->properties.version = message->properties.version;
	jausMessage->properties.reserved = message->properties.reserved;
	jausMessage->commandCode = message->commandCode;
	jausMessage->destination = jausAddressCreate();
	*jausMessage->destination = *message->destination;
	jausMessage->source = jausAddressCreate();
	*jausMessage->source = *message->source;
	jausMessage->dataSize = dataSize(message);
	jausMessage->dataFlag = message->dataFlag;
	jausMessage->sequenceNumber = message->sequenceNumber;
	
	jausMessage->data = (unsigned char *)malloc(jausMessage->dataSize);
	jausMessage->dataSize = dataToBuffer(message, jausMessage->data, jausMessage->dataSize);
	
	return jausMessage;
}


unsigned int createEventMessageSize(CreateEventMessage message)
{
	return (unsigned int)(dataSize(message) + JAUS_HEADER_SIZE_BYTES);
}

//********************* PRIVATE HEADER FUNCTIONS **********************//

static JausBoolean headerFromBuffer(CreateEventMessage message, unsigned char *buffer, unsigned int bufferSizeBytes)
{
	if(bufferSizeBytes < JAUS_HEADER_SIZE_BYTES)
	{ 
		return JAUS_FALSE;
	}
	else
	{
		// unpack header
		message->properties.priority = (buffer[0] & 0x0F);
		message->properties.ackNak	 = ((buffer[0] >> 4) & 0x03);
		message->properties.scFlag	 = ((buffer[0] >> 6) & 0x01);
		message->properties.expFlag	 = ((buffer[0] >> 7) & 0x01);
		message->properties.version	 = (buffer[1] & 0x3F);
		message->properties.reserved = ((buffer[1] >> 6) & 0x03);
		
		message->commandCode = buffer[2] + (buffer[3] << 8);
	
		message->destination->instance = buffer[4];
		message->destination->component = buffer[5];
		message->destination->node = buffer[6];
		message->destination->subsystem = buffer[7];
	
		message->source->instance = buffer[8];
		message->source->component = buffer[9];
		message->source->node = buffer[10];
		message->source->subsystem = buffer[11];
		
		message->dataSize = buffer[12] + ((buffer[13] & 0x0F) << 8);

		message->dataFlag = ((buffer[13] >> 4) & 0x0F);

		message->sequenceNumber = buffer[14] + (buffer[15] << 8);
		
		return JAUS_TRUE;
	}
}

static JausBoolean headerToBuffer(CreateEventMessage message, unsigned char *buffer, unsigned int bufferSizeBytes)
{
	JausUnsignedShort *propertiesPtr = (JausUnsignedShort*)&message->properties;
	
	if(bufferSizeBytes < JAUS_HEADER_SIZE_BYTES)
	{
		return JAUS_FALSE;
	}
	else
	{	
		buffer[0] = (unsigned char)(*propertiesPtr & 0xFF);
		buffer[1] = (unsigned char)((*propertiesPtr & 0xFF00) >> 8);

		buffer[2] = (unsigned char)(message->commandCode & 0xFF);
		buffer[3] = (unsigned char)((message->commandCode & 0xFF00) >> 8);

		buffer[4] = (unsigned char)(message->destination->instance & 0xFF);
		buffer[5] = (unsigned char)(message->destination->component & 0xFF);
		buffer[6] = (unsigned char)(message->destination->node & 0xFF);
		buffer[7] = (unsigned char)(message->destination->subsystem & 0xFF);

		buffer[8] = (unsigned char)(message->source->instance & 0xFF);
		buffer[9] = (unsigned char)(message->source->component & 0xFF);
		buffer[10] = (unsigned char)(message->source->node & 0xFF);
		buffer[11] = (unsigned char)(message->source->subsystem & 0xFF);
		
		buffer[12] = (unsigned char)(message->dataSize & 0xFF);
		buffer[13] = (unsigned char)((message->dataFlag & 0xFF) << 4) | (unsigned char)((message->dataSize & 0x0F00) >> 8);

		buffer[14] = (unsigned char)(message->sequenceNumber & 0xFF);
		buffer[15] = (unsigned char)((message->sequenceNumber & 0xFF00) >> 8);
		
		return JAUS_TRUE;
	}
}