opportunistic-xbee/packet.h

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#ifndef _PACKET_H_
#define _PACKET_H_
#include "protocol.h"
#include <Wire.h>
#define PKTREAD_OK 0
#define PKTREAD_EMPTY 1
#define PKTREAD_OVERFLOW 2
#define PKTREAD_INVALID_DISCOVER_FORMAT 3
#define PKTREAD_INVALID_MESSAGE_FORMAT 4
class Packet {
private:
// 1. common
uint8_t opcode; // 0 = discover ; 1 = message
// 2. wrappers
struct discover dsc;
struct message msg;
// 3. helpers
uint8_t read_discover(uint8_t* buf, const size_t size);
uint8_t read_message(uint8_t* buf, const size_t size);
size_t write_discover(uint8_t* buf);
size_t write_message(uint8_t* buf);
public:
Packet();
// builds a packet from raw data and returns the status code
uint8_t read(uint8_t* buf, const size_t size);
// writes the binary representation of the packet returns the size
size_t write(uint8_t* buf);
// GETTERS / SETTERS
uint8_t getOpcode();
void setOpcode(uint8_t value);
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uint8_t getSender();
void setSender(uint8_t value);
uint8_t getWave();
void setWave(uint8_t value);
uint8_t getDist();
void setDist(uint8_t value);
uint8_t getTTL();
void setTTL(uint8_t value);
uint8_t getSize();
uint8_t* getData();
void setData(uint8_t *buffer);
protected:
resizeMessage(){
msg.data = realloc(msg.data, (msg.size+1) * sizeof(uint8_t));
// memset(msg.data, 0, msg.size+1);
}
};
#endif