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/*
* Copyright (c) 2007, Technische Universitaet Berlin
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - Neither the name of the Technische Universitaet Berlin nor the names
* of its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @author Philipp Huppertz <huppertz@tkn.tu-berlin.de>
*/
#ifndef SFPACKET_H
#define SFPACKET_H
// #define DEBUG_SFPACKET
#undef DEBUG
#ifdef DEBUG_SFPACKET
#include <iostream>
#define DEBUG(message) std::cout << message << std::endl;
#else
#define DEBUG(message)
#endif
#include <iostream>
#include <stdint.h>
#include "serialprotocol.h"
enum {
SYNC_BYTE = SERIAL_HDLC_FLAG_BYTE,
ESCAPE_BYTE = SERIAL_HDLC_CTLESC_BYTE,
SF_ACK = SERIAL_SERIAL_PROTO_ACK,
SF_PACKET_ACK = SERIAL_SERIAL_PROTO_PACKET_ACK,
SF_PACKET_NO_ACK = SERIAL_SERIAL_PROTO_PACKET_NOACK,
SF_UNKNOWN = SERIAL_SERIAL_PROTO_PACKET_UNKNOWN
};
class SFPacket{
public:
/* max packet length in bytes */
static const int cMaxPacketLength = 256;
/** member vars **/
protected:
/* internal buffer */
char buffer[cMaxPacketLength + 1];
/* length of byte buffer */
int length;
/* type */
int type;
/* sequence number */
int seqno;
/** member functions **/
protected:
public:
SFPacket(int type = SF_PACKET_ACK, int pSeqno = 0);
~SFPacket();
SFPacket(const SFPacket &pPacket);
/* returns buffer */
const char* getPayload() const;
/* returns length of buffer */
int getLength() const;
/* return the length that shall be transmitted via TCP */
int getTcpLength() const;
/* return the payload of the TCP packet */
const char* getTcpPayload();
/* returns the seqno of this packet */
int getSeqno() const;
/* returns type of packet */
int getType() const;
/* sets buffer and length and constructs frame (incl crc) */
bool setPayload(const char* pBuffer, uint8_t pLength);
/* sets the seqno */
void setSeqno(int pSeqno);
/* sets the type */
void setType(int pType);
/* returns max payload length */
static const int getMaxPayloadLength();
/* == operator */
bool operator==(SFPacket const& pPacket);
};
#endif
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